/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 15:18:50,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 15:18:50,504 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 15:18:50,551 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 15:18:50,560 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 15:18:50,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 15:18:50,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 15:18:50,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 15:18:50,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 15:18:50,563 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 15:18:50,564 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 15:18:50,572 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 15:18:50,574 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 15:18:50,575 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 15:18:50,576 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 15:18:50,577 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 15:18:50,579 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 15:18:50,585 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 15:18:50,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 15:18:50,593 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 15:18:50,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 15:18:50,596 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 15:18:50,605 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 15:18:50,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 15:18:50,606 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 15:18:50,606 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 15:18:50,606 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 15:18:50,607 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 15:18:50,607 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 15:18:50,607 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 15:18:50,607 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 15:18:50,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 15:18:50,608 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 15:18:50,608 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 15:18:50,608 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 15:18:50,608 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 15:18:50,608 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:18:50,609 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 15:18:50,609 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 15:18:50,610 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 15:18:50,610 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 15:18:50,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 15:18:50,851 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 15:18:50,853 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 15:18:50,854 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 15:18:50,854 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 15:18:50,855 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-20 15:18:50,913 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75b481c3e/107f447b2d484e6ba51f25f6cb4d5d0b/FLAG7e30edecf [2022-03-20 15:18:51,318 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 15:18:51,318 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-20 15:18:51,325 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75b481c3e/107f447b2d484e6ba51f25f6cb4d5d0b/FLAG7e30edecf [2022-03-20 15:18:51,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/75b481c3e/107f447b2d484e6ba51f25f6cb4d5d0b [2022-03-20 15:18:51,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 15:18:51,702 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 15:18:51,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 15:18:51,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 15:18:51,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 15:18:51,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@374f568d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51, skipping insertion in model container [2022-03-20 15:18:51,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,713 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 15:18:51,725 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 15:18:51,866 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-03-20 15:18:51,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:18:51,904 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 15:18:51,918 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-03-20 15:18:51,938 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 15:18:51,950 INFO L208 MainTranslator]: Completed translation [2022-03-20 15:18:51,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51 WrapperNode [2022-03-20 15:18:51,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 15:18:51,952 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 15:18:51,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 15:18:51,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 15:18:51,961 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,961 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,968 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,982 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 15:18:51,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 15:18:51,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 15:18:51,989 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 15:18:51,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (1/1) ... [2022-03-20 15:18:51,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 15:18:52,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:52,016 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 15:18:52,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 15:18:52,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 15:18:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 15:18:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 15:18:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 15:18:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 15:18:52,064 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 15:18:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 15:18:52,064 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 15:18:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 15:18:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 15:18:52,065 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 15:18:52,066 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 15:18:52,067 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 15:18:52,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 15:18:52,126 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 15:18:52,129 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 15:18:52,292 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 15:18:52,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 15:18:52,298 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 15:18:52,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:52 BoogieIcfgContainer [2022-03-20 15:18:52,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 15:18:52,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 15:18:52,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 15:18:52,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 15:18:52,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 03:18:51" (1/3) ... [2022-03-20 15:18:52,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc529cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:52, skipping insertion in model container [2022-03-20 15:18:52,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 03:18:51" (2/3) ... [2022-03-20 15:18:52,305 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc529cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 03:18:52, skipping insertion in model container [2022-03-20 15:18:52,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 03:18:52" (3/3) ... [2022-03-20 15:18:52,306 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-03-20 15:18:52,311 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 15:18:52,311 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 15:18:52,377 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 15:18:52,382 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 15:18:52,382 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 15:18:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:18:52,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 15:18:52,415 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:52,415 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:52,416 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:52,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:52,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-20 15:18:52,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:52,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896280729] [2022-03-20 15:18:52,450 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 2 times [2022-03-20 15:18:52,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:52,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003563474] [2022-03-20 15:18:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:52,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:52,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:52,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1467848302] [2022-03-20 15:18:52,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:18:52,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:52,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:52,567 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:52,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 15:18:52,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:18:52,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:52,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-20 15:18:52,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-20 15:18:52,728 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:18:52,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:52,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003563474] [2022-03-20 15:18:52,729 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:52,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467848302] [2022-03-20 15:18:52,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467848302] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:52,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:52,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 15:18:52,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:52,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896280729] [2022-03-20 15:18:52,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896280729] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:52,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:52,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-20 15:18:52,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891102801] [2022-03-20 15:18:52,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:52,739 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-20 15:18:52,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:52,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-20 15:18:52,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 15:18:52,767 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:18:52,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:52,788 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-20 15:18:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-20 15:18:52,789 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2022-03-20 15:18:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:52,795 INFO L225 Difference]: With dead ends: 53 [2022-03-20 15:18:52,795 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 15:18:52,798 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-20 15:18:52,803 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:52,804 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:52,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 15:18:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 15:18:52,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 15:18:52,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-20 15:18:52,834 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-20 15:18:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:52,834 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-20 15:18:52,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:18:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-20 15:18:52,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 15:18:52,836 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:52,836 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:52,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:53,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-20 15:18:53,038 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:53,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:53,038 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-20 15:18:53,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:53,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98521193] [2022-03-20 15:18:53,039 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:53,040 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 2 times [2022-03-20 15:18:53,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:53,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475917124] [2022-03-20 15:18:53,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:53,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:53,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:53,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [187004641] [2022-03-20 15:18:53,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:18:53,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:53,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:53,068 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:53,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 15:18:53,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:18:53,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:53,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 15:18:53,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:53,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:53,258 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:18:53,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:53,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475917124] [2022-03-20 15:18:53,259 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:53,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187004641] [2022-03-20 15:18:53,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187004641] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:53,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:53,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:18:53,260 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:53,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98521193] [2022-03-20 15:18:53,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98521193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:53,260 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:53,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 15:18:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725347793] [2022-03-20 15:18:53,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:53,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 15:18:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 15:18:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:18:53,263 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:18:53,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:53,285 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-20 15:18:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 15:18:53,286 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-20 15:18:53,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:53,288 INFO L225 Difference]: With dead ends: 34 [2022-03-20 15:18:53,288 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 15:18:53,289 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 15:18:53,289 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:53,290 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 15:18:53,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 15:18:53,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 15:18:53,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-20 15:18:53,299 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-20 15:18:53,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:53,300 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-20 15:18:53,301 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 15:18:53,301 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-20 15:18:53,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 15:18:53,302 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:53,302 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:53,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:53,502 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-03-20 15:18:53,503 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:53,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:53,503 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-20 15:18:53,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:53,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [145456486] [2022-03-20 15:18:53,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:53,505 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 2 times [2022-03-20 15:18:53,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:53,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11343422] [2022-03-20 15:18:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:53,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:53,515 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:53,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683784531] [2022-03-20 15:18:53,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:18:53,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:53,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:53,517 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:53,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 15:18:53,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-03-20 15:18:53,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:53,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:18:53,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:54,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:54,328 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 15:18:54,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11343422] [2022-03-20 15:18:54,329 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:54,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683784531] [2022-03-20 15:18:54,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683784531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:54,329 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:54,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:18:54,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:54,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [145456486] [2022-03-20 15:18:54,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [145456486] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:54,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:54,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:18:54,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178857453] [2022-03-20 15:18:54,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:54,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:18:54,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:54,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:18:54,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 15:18:54,332 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:18:55,952 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 15:18:55,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:55,968 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2022-03-20 15:18:55,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 15:18:55,969 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-20 15:18:55,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:55,970 INFO L225 Difference]: With dead ends: 39 [2022-03-20 15:18:55,970 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 15:18:55,970 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 15:18:55,971 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 8 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:55,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 91 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 15:18:55,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 15:18:55,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-03-20 15:18:55,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 15:18:55,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-03-20 15:18:55,980 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 23 [2022-03-20 15:18:55,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:55,981 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-03-20 15:18:55,981 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-20 15:18:55,981 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-03-20 15:18:55,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 15:18:55,982 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:55,982 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:56,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:56,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:56,190 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:56,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:56,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-20 15:18:56,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:56,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136385658] [2022-03-20 15:18:56,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:56,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 2 times [2022-03-20 15:18:56,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:56,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016898966] [2022-03-20 15:18:56,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:56,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:56,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:56,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2015466449] [2022-03-20 15:18:56,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:18:56,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:56,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:56,204 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:56,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 15:18:56,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:18:56,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:56,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-20 15:18:56,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:56,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:56,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:18:56,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:56,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016898966] [2022-03-20 15:18:56,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:56,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015466449] [2022-03-20 15:18:56,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015466449] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:18:56,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:18:56,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-20 15:18:56,665 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:56,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136385658] [2022-03-20 15:18:56,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136385658] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:56,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:56,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:18:56,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933404791] [2022-03-20 15:18:56,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:56,666 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:18:56,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:56,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:18:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:18:56,667 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:18:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:56,755 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-03-20 15:18:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:18:56,755 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 29 [2022-03-20 15:18:56,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:56,758 INFO L225 Difference]: With dead ends: 43 [2022-03-20 15:18:56,758 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 15:18:56,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-20 15:18:56,761 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:56,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 113 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:56,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 15:18:56,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 29. [2022-03-20 15:18:56,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-20 15:18:56,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-20 15:18:56,772 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-20 15:18:56,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:56,772 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-20 15:18:56,773 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 15:18:56,773 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-20 15:18:56,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 15:18:56,773 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:56,774 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:56,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:56,987 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:56,987 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:56,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:56,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-20 15:18:56,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:56,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89824025] [2022-03-20 15:18:56,989 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:56,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 2 times [2022-03-20 15:18:56,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:56,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201870853] [2022-03-20 15:18:56,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:56,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:57,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:57,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152571774] [2022-03-20 15:18:57,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:18:57,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:57,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:57,006 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:57,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 15:18:57,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:18:57,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:57,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 15:18:57,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:57,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:57,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:18:57,240 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:57,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:57,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201870853] [2022-03-20 15:18:57,241 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152571774] [2022-03-20 15:18:57,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152571774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:18:57,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:18:57,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-20 15:18:57,242 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:57,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89824025] [2022-03-20 15:18:57,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89824025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:57,243 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:57,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 15:18:57,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415267570] [2022-03-20 15:18:57,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:57,243 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 15:18:57,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:57,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 15:18:57,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-20 15:18:57,244 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 15:18:57,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:57,281 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-20 15:18:57,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 15:18:57,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2022-03-20 15:18:57,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:57,285 INFO L225 Difference]: With dead ends: 43 [2022-03-20 15:18:57,285 INFO L226 Difference]: Without dead ends: 38 [2022-03-20 15:18:57,285 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-03-20 15:18:57,286 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:57,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 78 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:57,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-20 15:18:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-03-20 15:18:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-20 15:18:57,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-03-20 15:18:57,308 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2022-03-20 15:18:57,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:57,309 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-03-20 15:18:57,309 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-20 15:18:57,309 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-03-20 15:18:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 15:18:57,312 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:57,312 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:57,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:57,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:57,528 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:57,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:57,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 3 times [2022-03-20 15:18:57,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:57,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082254721] [2022-03-20 15:18:57,529 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:57,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 4 times [2022-03-20 15:18:57,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:57,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494161651] [2022-03-20 15:18:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:57,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:57,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:57,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1372297970] [2022-03-20 15:18:57,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:18:57,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:57,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:57,546 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:57,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 15:18:57,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:18:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:57,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 15:18:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:57,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:18:57,854 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-03-20 15:18:57,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494161651] [2022-03-20 15:18:57,855 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:57,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372297970] [2022-03-20 15:18:57,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372297970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:18:57,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:18:57,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-03-20 15:18:57,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:57,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082254721] [2022-03-20 15:18:57,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082254721] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:57,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:57,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 15:18:57,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005171668] [2022-03-20 15:18:57,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:57,861 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 15:18:57,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 15:18:57,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-03-20 15:18:57,862 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:18:57,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:57,910 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-03-20 15:18:57,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 15:18:57,910 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2022-03-20 15:18:57,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:57,911 INFO L225 Difference]: With dead ends: 52 [2022-03-20 15:18:57,911 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 15:18:57,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:18:57,912 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:57,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 86 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:57,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 15:18:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 15:18:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-20 15:18:57,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-03-20 15:18:57,930 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2022-03-20 15:18:57,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:57,931 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-03-20 15:18:57,933 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-20 15:18:57,933 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-03-20 15:18:57,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 15:18:57,934 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:57,935 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:57,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:58,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:58,140 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:58,140 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 5 times [2022-03-20 15:18:58,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:58,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912285862] [2022-03-20 15:18:58,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:58,141 INFO L85 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 6 times [2022-03-20 15:18:58,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:58,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629189416] [2022-03-20 15:18:58,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:58,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:58,161 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:58,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1647777687] [2022-03-20 15:18:58,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:18:58,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:58,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:58,176 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:58,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 15:18:58,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-20 15:18:58,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:58,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 15:18:58,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:58,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:18:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-20 15:18:58,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629189416] [2022-03-20 15:18:58,485 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:58,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647777687] [2022-03-20 15:18:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647777687] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:18:58,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:18:58,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2022-03-20 15:18:58,485 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:58,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912285862] [2022-03-20 15:18:58,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912285862] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:58,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:58,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 15:18:58,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763511130] [2022-03-20 15:18:58,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:58,486 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 15:18:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:58,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 15:18:58,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2022-03-20 15:18:58,487 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:18:58,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:58,548 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2022-03-20 15:18:58,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 15:18:58,549 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2022-03-20 15:18:58,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:58,550 INFO L225 Difference]: With dead ends: 61 [2022-03-20 15:18:58,550 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 15:18:58,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2022-03-20 15:18:58,551 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:58,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 100 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:58,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 15:18:58,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-20 15:18:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-20 15:18:58,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-20 15:18:58,564 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2022-03-20 15:18:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:58,564 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-20 15:18:58,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-20 15:18:58,565 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-20 15:18:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 15:18:58,566 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:58,566 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:58,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:58,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:58,779 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:58,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:58,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 7 times [2022-03-20 15:18:58,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1636720015] [2022-03-20 15:18:58,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 8 times [2022-03-20 15:18:58,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:58,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412403517] [2022-03-20 15:18:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:58,793 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:58,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [760831818] [2022-03-20 15:18:58,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:18:58,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:58,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:58,796 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:58,797 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 15:18:58,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:18:58,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:58,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 15:18:58,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:58,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:18:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-20 15:18:59,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:18:59,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412403517] [2022-03-20 15:18:59,134 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:18:59,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760831818] [2022-03-20 15:18:59,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760831818] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:18:59,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:18:59,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-20 15:18:59,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:18:59,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1636720015] [2022-03-20 15:18:59,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1636720015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:18:59,135 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:18:59,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 15:18:59,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691920203] [2022-03-20 15:18:59,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:18:59,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 15:18:59,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:59,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 15:18:59,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-20 15:18:59,137 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:18:59,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:18:59,211 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2022-03-20 15:18:59,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 15:18:59,212 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2022-03-20 15:18:59,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:18:59,215 INFO L225 Difference]: With dead ends: 70 [2022-03-20 15:18:59,216 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 15:18:59,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:18:59,217 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 11 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:18:59,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 114 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:18:59,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 15:18:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 15:18:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-20 15:18:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2022-03-20 15:18:59,233 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2022-03-20 15:18:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:18:59,234 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2022-03-20 15:18:59,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-20 15:18:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2022-03-20 15:18:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 15:18:59,235 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:18:59,235 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:18:59,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 15:18:59,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-20 15:18:59,452 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:18:59,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:18:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 9 times [2022-03-20 15:18:59,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:18:59,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1812821368] [2022-03-20 15:18:59,453 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:18:59,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 10 times [2022-03-20 15:18:59,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:18:59,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912322710] [2022-03-20 15:18:59,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:18:59,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:18:59,462 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:18:59,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288544889] [2022-03-20 15:18:59,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:18:59,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:18:59,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:18:59,464 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:18:59,471 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 15:18:59,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:18:59,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:18:59,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 15:18:59,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:18:59,844 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:18:59,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-03-20 15:19:00,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:00,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912322710] [2022-03-20 15:19:00,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:00,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288544889] [2022-03-20 15:19:00,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288544889] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:00,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:00,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2022-03-20 15:19:00,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:00,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1812821368] [2022-03-20 15:19:00,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1812821368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:00,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:00,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 15:19:00,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922367116] [2022-03-20 15:19:00,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:00,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 15:19:00,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:00,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 15:19:00,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2022-03-20 15:19:00,058 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:19:00,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:00,141 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-03-20 15:19:00,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 15:19:00,142 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2022-03-20 15:19:00,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:00,143 INFO L225 Difference]: With dead ends: 79 [2022-03-20 15:19:00,143 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 15:19:00,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=249, Unknown=0, NotChecked=0, Total=420 [2022-03-20 15:19:00,144 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 19 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:00,144 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 116 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:00,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 15:19:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-03-20 15:19:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-20 15:19:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2022-03-20 15:19:00,160 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2022-03-20 15:19:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:00,160 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2022-03-20 15:19:00,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 15:19:00,161 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2022-03-20 15:19:00,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 15:19:00,162 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:00,162 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:00,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:00,385 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:00,385 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:00,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 11 times [2022-03-20 15:19:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:00,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377959383] [2022-03-20 15:19:00,386 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:00,386 INFO L85 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 12 times [2022-03-20 15:19:00,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:00,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228415908] [2022-03-20 15:19:00,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:00,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:00,400 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:00,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587198150] [2022-03-20 15:19:00,400 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:00,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:00,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:00,402 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:00,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 15:19:00,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-20 15:19:00,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:00,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 15:19:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:00,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:01,003 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 87 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 15:19:01,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228415908] [2022-03-20 15:19:01,004 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:01,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587198150] [2022-03-20 15:19:01,004 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587198150] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:01,004 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:01,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-03-20 15:19:01,004 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:01,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377959383] [2022-03-20 15:19:01,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377959383] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:01,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:01,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 15:19:01,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144786056] [2022-03-20 15:19:01,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:01,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 15:19:01,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:01,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 15:19:01,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-03-20 15:19:01,006 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:19:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:01,123 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2022-03-20 15:19:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 15:19:01,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2022-03-20 15:19:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:01,125 INFO L225 Difference]: With dead ends: 88 [2022-03-20 15:19:01,125 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 15:19:01,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=227, Invalid=325, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:01,126 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 29 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:01,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 118 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:01,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 15:19:01,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 15:19:01,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 15:19:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2022-03-20 15:19:01,143 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2022-03-20 15:19:01,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:01,144 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2022-03-20 15:19:01,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-20 15:19:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2022-03-20 15:19:01,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 15:19:01,148 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:01,148 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:01,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:01,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 15:19:01,353 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:01,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 13 times [2022-03-20 15:19:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931071552] [2022-03-20 15:19:01,354 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:01,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 14 times [2022-03-20 15:19:01,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:01,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988547472] [2022-03-20 15:19:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:01,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:01,362 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:01,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1934140347] [2022-03-20 15:19:01,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:01,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:01,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:01,364 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:01,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 15:19:01,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:01,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:01,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 15:19:01,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:01,635 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:01,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:01,876 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 15:19:01,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:01,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988547472] [2022-03-20 15:19:01,876 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:01,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934140347] [2022-03-20 15:19:01,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934140347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:01,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:01,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-03-20 15:19:01,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:01,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931071552] [2022-03-20 15:19:01,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931071552] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:01,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:01,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 15:19:01,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115196388] [2022-03-20 15:19:01,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:01,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 15:19:01,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:01,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 15:19:01,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2022-03-20 15:19:01,879 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:19:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:01,987 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2022-03-20 15:19:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 15:19:01,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2022-03-20 15:19:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:01,988 INFO L225 Difference]: With dead ends: 97 [2022-03-20 15:19:01,988 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 15:19:01,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=291, Invalid=411, Unknown=0, NotChecked=0, Total=702 [2022-03-20 15:19:01,989 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:01,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 138 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 15:19:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 15:19:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 15:19:02,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-20 15:19:02,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2022-03-20 15:19:02,004 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2022-03-20 15:19:02,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:02,005 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2022-03-20 15:19:02,005 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-20 15:19:02,005 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2022-03-20 15:19:02,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 15:19:02,006 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:02,006 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:02,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:02,229 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 15:19:02,229 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 15 times [2022-03-20 15:19:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:02,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146495923] [2022-03-20 15:19:02,230 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:02,230 INFO L85 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 16 times [2022-03-20 15:19:02,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:02,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256121003] [2022-03-20 15:19:02,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:02,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:02,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:02,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054872831] [2022-03-20 15:19:02,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:02,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:02,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:02,241 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:02,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 15:19:02,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:02,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:02,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 21 conjunts are in the unsatisfiable core [2022-03-20 15:19:02,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:02,573 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:02,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:02,858 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2022-03-20 15:19:02,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256121003] [2022-03-20 15:19:02,858 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:02,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054872831] [2022-03-20 15:19:02,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054872831] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:02,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:02,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2022-03-20 15:19:02,859 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:02,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146495923] [2022-03-20 15:19:02,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146495923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:02,859 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:02,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 15:19:02,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928168839] [2022-03-20 15:19:02,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:02,860 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 15:19:02,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:02,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 15:19:02,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=267, Unknown=0, NotChecked=0, Total=462 [2022-03-20 15:19:02,861 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:19:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:02,987 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2022-03-20 15:19:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 15:19:02,987 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2022-03-20 15:19:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:02,988 INFO L225 Difference]: With dead ends: 106 [2022-03-20 15:19:02,989 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 15:19:02,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=363, Invalid=507, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:19:02,990 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 18 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:02,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:02,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 15:19:03,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 15:19:03,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 15:19:03,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-03-20 15:19:03,004 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2022-03-20 15:19:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:03,004 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-03-20 15:19:03,004 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-20 15:19:03,004 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-03-20 15:19:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 15:19:03,005 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:03,005 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:03,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:03,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 15:19:03,229 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:03,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:03,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 17 times [2022-03-20 15:19:03,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:03,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2051046943] [2022-03-20 15:19:03,229 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:03,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 18 times [2022-03-20 15:19:03,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:03,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578058617] [2022-03-20 15:19:03,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:03,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:03,239 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:03,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1004117249] [2022-03-20 15:19:03,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:03,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:03,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:03,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 15:19:03,401 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-03-20 15:19:03,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:03,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 15:19:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:03,657 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:03,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:03,947 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 198 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2022-03-20 15:19:03,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578058617] [2022-03-20 15:19:03,947 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:03,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004117249] [2022-03-20 15:19:03,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004117249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:03,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:03,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-03-20 15:19:03,948 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:03,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2051046943] [2022-03-20 15:19:03,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2051046943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:03,948 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:03,948 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 15:19:03,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205559359] [2022-03-20 15:19:03,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:03,949 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 15:19:03,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:03,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 15:19:03,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=316, Unknown=0, NotChecked=0, Total=552 [2022-03-20 15:19:03,949 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:19:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:04,105 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2022-03-20 15:19:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 15:19:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2022-03-20 15:19:04,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:04,106 INFO L225 Difference]: With dead ends: 115 [2022-03-20 15:19:04,106 INFO L226 Difference]: Without dead ends: 110 [2022-03-20 15:19:04,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=443, Invalid=613, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 15:19:04,107 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 35 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:04,108 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 148 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:04,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-20 15:19:04,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-20 15:19:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-20 15:19:04,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-20 15:19:04,123 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2022-03-20 15:19:04,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:04,123 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-20 15:19:04,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-20 15:19:04,124 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-20 15:19:04,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 15:19:04,124 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:04,125 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:04,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:04,330 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 15:19:04,330 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 19 times [2022-03-20 15:19:04,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:04,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [301222419] [2022-03-20 15:19:04,331 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:04,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 20 times [2022-03-20 15:19:04,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:04,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191504016] [2022-03-20 15:19:04,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:04,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:04,340 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:04,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311672435] [2022-03-20 15:19:04,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:04,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:04,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:04,342 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:04,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 15:19:04,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:04,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:04,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-20 15:19:04,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:04,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:05,021 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-20 15:19:05,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191504016] [2022-03-20 15:19:05,021 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:05,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311672435] [2022-03-20 15:19:05,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311672435] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:05,021 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:05,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-20 15:19:05,022 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:05,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [301222419] [2022-03-20 15:19:05,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [301222419] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:05,022 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:05,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 15:19:05,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069473919] [2022-03-20 15:19:05,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:05,023 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 15:19:05,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:05,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 15:19:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-20 15:19:05,024 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:19:05,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:05,182 INFO L93 Difference]: Finished difference Result 124 states and 136 transitions. [2022-03-20 15:19:05,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 15:19:05,183 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) Word has length 113 [2022-03-20 15:19:05,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:05,184 INFO L225 Difference]: With dead ends: 124 [2022-03-20 15:19:05,184 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 15:19:05,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=531, Invalid=729, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:19:05,185 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:05,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 150 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:05,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 15:19:05,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 15:19:05,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 89 states have (on average 1.1348314606741574) internal successors, (101), 89 states have internal predecessors, (101), 16 states have call successors, (16), 15 states have call predecessors, (16), 13 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 15:19:05,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2022-03-20 15:19:05,201 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 113 [2022-03-20 15:19:05,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:05,201 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2022-03-20 15:19:05,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.857142857142857) internal successors, (82), 13 states have internal predecessors, (82), 13 states have call successors, (15), 13 states have call predecessors, (15), 11 states have return successors, (13), 11 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-20 15:19:05,201 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2022-03-20 15:19:05,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 15:19:05,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:05,203 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:05,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:05,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:05,415 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:05,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:05,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 21 times [2022-03-20 15:19:05,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:05,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254176667] [2022-03-20 15:19:05,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:05,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1999651676, now seen corresponding path program 22 times [2022-03-20 15:19:05,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:05,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88047917] [2022-03-20 15:19:05,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:05,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:05,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:05,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909681899] [2022-03-20 15:19:05,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:05,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:05,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:05,428 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:05,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 15:19:05,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 15:19:05,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:05,755 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 517 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:05,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 22 proven. 297 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-03-20 15:19:06,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:06,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88047917] [2022-03-20 15:19:06,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909681899] [2022-03-20 15:19:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909681899] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:06,094 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:06,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-03-20 15:19:06,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:06,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254176667] [2022-03-20 15:19:06,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254176667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:06,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:06,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 15:19:06,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555737966] [2022-03-20 15:19:06,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:06,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 15:19:06,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:06,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 15:19:06,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=426, Unknown=0, NotChecked=0, Total=756 [2022-03-20 15:19:06,096 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:19:06,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:06,263 INFO L93 Difference]: Finished difference Result 133 states and 146 transitions. [2022-03-20 15:19:06,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 15:19:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) Word has length 122 [2022-03-20 15:19:06,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:06,264 INFO L225 Difference]: With dead ends: 133 [2022-03-20 15:19:06,264 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 15:19:06,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=627, Invalid=855, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 15:19:06,266 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 28 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:06,266 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 170 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 15:19:06,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-03-20 15:19:06,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.1354166666666667) internal successors, (109), 96 states have internal predecessors, (109), 17 states have call successors, (17), 16 states have call predecessors, (17), 14 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 15:19:06,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 141 transitions. [2022-03-20 15:19:06,283 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 141 transitions. Word has length 122 [2022-03-20 15:19:06,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:06,283 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 141 transitions. [2022-03-20 15:19:06,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.933333333333334) internal successors, (89), 14 states have internal predecessors, (89), 14 states have call successors, (16), 14 states have call predecessors, (16), 12 states have return successors, (14), 12 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-20 15:19:06,283 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 141 transitions. [2022-03-20 15:19:06,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 15:19:06,284 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:06,284 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:06,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:06,501 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-20 15:19:06,502 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:06,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 23 times [2022-03-20 15:19:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:06,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [766136953] [2022-03-20 15:19:06,503 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash 881443734, now seen corresponding path program 24 times [2022-03-20 15:19:06,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:06,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255040927] [2022-03-20 15:19:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:06,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:06,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:06,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1149607690] [2022-03-20 15:19:06,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:06,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:06,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:06,514 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:06,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 15:19:08,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-20 15:19:08,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:08,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-20 15:19:08,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:08,467 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 618 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:08,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:08,878 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 24 proven. 354 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-03-20 15:19:08,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255040927] [2022-03-20 15:19:08,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:08,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149607690] [2022-03-20 15:19:08,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149607690] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:08,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:08,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2022-03-20 15:19:08,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:08,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [766136953] [2022-03-20 15:19:08,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [766136953] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:08,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:08,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 15:19:08,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991908341] [2022-03-20 15:19:08,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:08,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 15:19:08,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:08,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 15:19:08,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=487, Unknown=0, NotChecked=0, Total=870 [2022-03-20 15:19:08,881 INFO L87 Difference]: Start difference. First operand 128 states and 141 transitions. Second operand has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:19:09,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:09,070 INFO L93 Difference]: Finished difference Result 142 states and 156 transitions. [2022-03-20 15:19:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 15:19:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) Word has length 131 [2022-03-20 15:19:09,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:09,071 INFO L225 Difference]: With dead ends: 142 [2022-03-20 15:19:09,071 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 15:19:09,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=731, Invalid=991, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:19:09,072 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:09,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:09,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 15:19:09,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 15:19:09,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 states have internal predecessors, (117), 18 states have call successors, (18), 17 states have call predecessors, (18), 15 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 15:19:09,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 151 transitions. [2022-03-20 15:19:09,090 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 151 transitions. Word has length 131 [2022-03-20 15:19:09,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:09,090 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 151 transitions. [2022-03-20 15:19:09,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0) internal successors, (96), 15 states have internal predecessors, (96), 15 states have call successors, (17), 15 states have call predecessors, (17), 13 states have return successors, (15), 13 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-20 15:19:09,091 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 151 transitions. [2022-03-20 15:19:09,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 15:19:09,092 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:09,092 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:09,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-20 15:19:09,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 15:19:09,299 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 25 times [2022-03-20 15:19:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:09,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657824178] [2022-03-20 15:19:09,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 2089018524, now seen corresponding path program 26 times [2022-03-20 15:19:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:09,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740043858] [2022-03-20 15:19:09,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:09,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:09,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:09,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1413481940] [2022-03-20 15:19:09,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:09,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:09,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:09,313 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:09,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 15:19:09,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:09,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-20 15:19:09,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:09,670 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 728 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:09,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 26 proven. 416 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-03-20 15:19:10,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740043858] [2022-03-20 15:19:10,083 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:10,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413481940] [2022-03-20 15:19:10,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413481940] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:10,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:10,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2022-03-20 15:19:10,083 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:10,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657824178] [2022-03-20 15:19:10,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657824178] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:10,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:10,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 15:19:10,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394002181] [2022-03-20 15:19:10,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:10,084 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 15:19:10,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 15:19:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=552, Unknown=0, NotChecked=0, Total=992 [2022-03-20 15:19:10,085 INFO L87 Difference]: Start difference. First operand 137 states and 151 transitions. Second operand has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:19:10,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:10,295 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2022-03-20 15:19:10,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 15:19:10,295 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) Word has length 140 [2022-03-20 15:19:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:10,296 INFO L225 Difference]: With dead ends: 151 [2022-03-20 15:19:10,297 INFO L226 Difference]: Without dead ends: 146 [2022-03-20 15:19:10,297 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 249 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=843, Invalid=1137, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 15:19:10,298 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 54 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:10,298 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 186 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-03-20 15:19:10,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-03-20 15:19:10,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 110 states have internal predecessors, (125), 19 states have call successors, (19), 18 states have call predecessors, (19), 16 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 15:19:10,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 161 transitions. [2022-03-20 15:19:10,315 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 161 transitions. Word has length 140 [2022-03-20 15:19:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:10,316 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 161 transitions. [2022-03-20 15:19:10,316 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.0588235294117645) internal successors, (103), 16 states have internal predecessors, (103), 16 states have call successors, (18), 16 states have call predecessors, (18), 14 states have return successors, (16), 14 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-20 15:19:10,316 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 161 transitions. [2022-03-20 15:19:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 15:19:10,317 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:10,317 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:10,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:10,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 15:19:10,528 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:10,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:10,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 27 times [2022-03-20 15:19:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:10,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [802738216] [2022-03-20 15:19:10,528 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:10,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1088976298, now seen corresponding path program 28 times [2022-03-20 15:19:10,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:10,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218054223] [2022-03-20 15:19:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:10,537 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:10,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [406018719] [2022-03-20 15:19:10,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:10,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:10,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:10,539 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:10,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 15:19:10,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:10,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:10,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 15:19:10,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 847 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:11,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 879 backedges. 28 proven. 483 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2022-03-20 15:19:11,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:11,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218054223] [2022-03-20 15:19:11,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406018719] [2022-03-20 15:19:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406018719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:11,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2022-03-20 15:19:11,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:11,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [802738216] [2022-03-20 15:19:11,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [802738216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:11,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:11,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 15:19:11,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866226049] [2022-03-20 15:19:11,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:11,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 15:19:11,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:11,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 15:19:11,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 15:19:11,562 INFO L87 Difference]: Start difference. First operand 146 states and 161 transitions. Second operand has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:19:11,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:11,789 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-03-20 15:19:11,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 15:19:11,789 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) Word has length 149 [2022-03-20 15:19:11,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:11,791 INFO L225 Difference]: With dead ends: 160 [2022-03-20 15:19:11,791 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 15:19:11,791 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=963, Invalid=1293, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 15:19:11,792 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 46 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:11,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 188 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:11,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 15:19:11,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 15:19:11,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 20 states have call successors, (20), 19 states have call predecessors, (20), 17 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 15:19:11,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 171 transitions. [2022-03-20 15:19:11,814 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 171 transitions. Word has length 149 [2022-03-20 15:19:11,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:11,815 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 171 transitions. [2022-03-20 15:19:11,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 6.111111111111111) internal successors, (110), 17 states have internal predecessors, (110), 17 states have call successors, (19), 17 states have call predecessors, (19), 15 states have return successors, (17), 15 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-20 15:19:11,815 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 171 transitions. [2022-03-20 15:19:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 15:19:11,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:11,817 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:11,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:12,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-20 15:19:12,023 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:12,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 29 times [2022-03-20 15:19:12,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:12,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644765115] [2022-03-20 15:19:12,024 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:12,024 INFO L85 PathProgramCache]: Analyzing trace with hash -2060864036, now seen corresponding path program 30 times [2022-03-20 15:19:12,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:12,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725420213] [2022-03-20 15:19:12,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:12,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:12,042 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:12,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702834267] [2022-03-20 15:19:12,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:12,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:12,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:12,055 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:12,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 15:19:33,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-03-20 15:19:33,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:33,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 35 conjunts are in the unsatisfiable core [2022-03-20 15:19:33,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:34,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:34,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 30 proven. 555 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-03-20 15:19:34,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:34,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725420213] [2022-03-20 15:19:34,641 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:34,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702834267] [2022-03-20 15:19:34,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702834267] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:34,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:34,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2022-03-20 15:19:34,642 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:34,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644765115] [2022-03-20 15:19:34,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644765115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:34,642 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:34,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 15:19:34,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808119838] [2022-03-20 15:19:34,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:34,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 15:19:34,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:34,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 15:19:34,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=566, Invalid=694, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 15:19:34,644 INFO L87 Difference]: Start difference. First operand 155 states and 171 transitions. Second operand has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:19:34,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:34,887 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2022-03-20 15:19:34,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 15:19:34,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) Word has length 158 [2022-03-20 15:19:34,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:34,888 INFO L225 Difference]: With dead ends: 169 [2022-03-20 15:19:34,888 INFO L226 Difference]: Without dead ends: 164 [2022-03-20 15:19:34,889 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=1459, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 15:19:34,889 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:34,889 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 196 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:34,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-20 15:19:34,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-03-20 15:19:34,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 124 states have internal predecessors, (141), 21 states have call successors, (21), 20 states have call predecessors, (21), 18 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 15:19:34,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 181 transitions. [2022-03-20 15:19:34,906 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 181 transitions. Word has length 158 [2022-03-20 15:19:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:34,906 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 181 transitions. [2022-03-20 15:19:34,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 6.157894736842105) internal successors, (117), 18 states have internal predecessors, (117), 18 states have call successors, (20), 18 states have call predecessors, (20), 16 states have return successors, (18), 16 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-20 15:19:34,906 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 181 transitions. [2022-03-20 15:19:34,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 15:19:34,907 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:34,907 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:34,916 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:35,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:35,108 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:35,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:35,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 31 times [2022-03-20 15:19:35,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:35,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1269928083] [2022-03-20 15:19:35,108 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:35,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1479991018, now seen corresponding path program 32 times [2022-03-20 15:19:35,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:35,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879822710] [2022-03-20 15:19:35,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:35,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:35,117 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:35,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1177267335] [2022-03-20 15:19:35,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:35,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:35,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:35,119 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:35,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 15:19:35,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:35,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:35,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 15:19:35,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:35,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 1112 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:35,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:36,112 INFO L134 CoverageAnalysis]: Checked inductivity of 1148 backedges. 32 proven. 632 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-03-20 15:19:36,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:36,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879822710] [2022-03-20 15:19:36,126 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177267335] [2022-03-20 15:19:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177267335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:36,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:36,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 38 [2022-03-20 15:19:36,126 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:36,126 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1269928083] [2022-03-20 15:19:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1269928083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:36,126 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:36,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 15:19:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548037567] [2022-03-20 15:19:36,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:36,127 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 15:19:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 15:19:36,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=771, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 15:19:36,128 INFO L87 Difference]: Start difference. First operand 164 states and 181 transitions. Second operand has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:19:36,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:36,377 INFO L93 Difference]: Finished difference Result 178 states and 196 transitions. [2022-03-20 15:19:36,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 15:19:36,377 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) Word has length 167 [2022-03-20 15:19:36,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:36,378 INFO L225 Difference]: With dead ends: 178 [2022-03-20 15:19:36,378 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 15:19:36,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 297 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1227, Invalid=1635, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 15:19:36,379 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 58 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:36,380 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 204 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:36,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 15:19:36,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 15:19:36,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 131 states have (on average 1.1374045801526718) internal successors, (149), 131 states have internal predecessors, (149), 22 states have call successors, (22), 21 states have call predecessors, (22), 19 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 15:19:36,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 191 transitions. [2022-03-20 15:19:36,402 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 191 transitions. Word has length 167 [2022-03-20 15:19:36,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:36,402 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 191 transitions. [2022-03-20 15:19:36,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 6.2) internal successors, (124), 19 states have internal predecessors, (124), 19 states have call successors, (21), 19 states have call predecessors, (21), 17 states have return successors, (19), 17 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-20 15:19:36,403 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 191 transitions. [2022-03-20 15:19:36,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 15:19:36,403 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:36,404 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:36,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:36,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:36,611 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:36,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 33 times [2022-03-20 15:19:36,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:36,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1524088565] [2022-03-20 15:19:36,612 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:36,612 INFO L85 PathProgramCache]: Analyzing trace with hash 318093084, now seen corresponding path program 34 times [2022-03-20 15:19:36,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:36,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358546512] [2022-03-20 15:19:36,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:36,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:36,624 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:36,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347780895] [2022-03-20 15:19:36,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:36,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:36,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:36,626 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:36,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 15:19:36,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:36,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:36,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 433 conjuncts, 39 conjunts are in the unsatisfiable core [2022-03-20 15:19:36,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:37,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 1258 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:37,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 34 proven. 714 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2022-03-20 15:19:37,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358546512] [2022-03-20 15:19:37,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:37,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347780895] [2022-03-20 15:19:37,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347780895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:37,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:37,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 40 [2022-03-20 15:19:37,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:37,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1524088565] [2022-03-20 15:19:37,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1524088565] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:37,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:37,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 15:19:37,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374858347] [2022-03-20 15:19:37,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:37,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 15:19:37,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:37,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 15:19:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=852, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 15:19:37,776 INFO L87 Difference]: Start difference. First operand 173 states and 191 transitions. Second operand has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:19:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:38,032 INFO L93 Difference]: Finished difference Result 187 states and 206 transitions. [2022-03-20 15:19:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 15:19:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) Word has length 176 [2022-03-20 15:19:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:38,033 INFO L225 Difference]: With dead ends: 187 [2022-03-20 15:19:38,033 INFO L226 Difference]: Without dead ends: 182 [2022-03-20 15:19:38,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1371, Invalid=1821, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 15:19:38,035 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:38,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 218 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:38,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-20 15:19:38,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-03-20 15:19:38,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 138 states have (on average 1.1376811594202898) internal successors, (157), 138 states have internal predecessors, (157), 23 states have call successors, (23), 22 states have call predecessors, (23), 20 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-20 15:19:38,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 201 transitions. [2022-03-20 15:19:38,058 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 201 transitions. Word has length 176 [2022-03-20 15:19:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:38,058 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 201 transitions. [2022-03-20 15:19:38,058 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 6.238095238095238) internal successors, (131), 20 states have internal predecessors, (131), 20 states have call successors, (22), 20 states have call predecessors, (22), 18 states have return successors, (20), 18 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-20 15:19:38,058 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 201 transitions. [2022-03-20 15:19:38,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 15:19:38,059 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:38,059 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:38,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 15:19:38,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:38,265 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 35 times [2022-03-20 15:19:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:38,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [632444803] [2022-03-20 15:19:38,266 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:38,266 INFO L85 PathProgramCache]: Analyzing trace with hash 994740182, now seen corresponding path program 36 times [2022-03-20 15:19:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:38,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313900145] [2022-03-20 15:19:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:38,274 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:38,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2081153054] [2022-03-20 15:19:38,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:38,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:38,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:38,276 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:38,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 15:19:38,657 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-20 15:19:38,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:38,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-20 15:19:38,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 1413 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:39,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:39,753 INFO L134 CoverageAnalysis]: Checked inductivity of 1453 backedges. 36 proven. 801 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2022-03-20 15:19:39,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313900145] [2022-03-20 15:19:39,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081153054] [2022-03-20 15:19:39,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081153054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:39,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:39,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2022-03-20 15:19:39,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:39,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [632444803] [2022-03-20 15:19:39,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [632444803] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:39,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:39,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 15:19:39,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331227134] [2022-03-20 15:19:39,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:39,755 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 15:19:39,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:39,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 15:19:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=785, Invalid=937, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 15:19:39,756 INFO L87 Difference]: Start difference. First operand 182 states and 201 transitions. Second operand has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:19:40,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:40,014 INFO L93 Difference]: Finished difference Result 196 states and 216 transitions. [2022-03-20 15:19:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 15:19:40,016 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) Word has length 185 [2022-03-20 15:19:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:40,018 INFO L225 Difference]: With dead ends: 196 [2022-03-20 15:19:40,018 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 15:19:40,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1523, Invalid=2017, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 15:19:40,019 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 61 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:40,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 220 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:40,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 15:19:40,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 15:19:40,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.1379310344827587) internal successors, (165), 145 states have internal predecessors, (165), 24 states have call successors, (24), 23 states have call predecessors, (24), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-20 15:19:40,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 211 transitions. [2022-03-20 15:19:40,042 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 211 transitions. Word has length 185 [2022-03-20 15:19:40,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:40,042 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 211 transitions. [2022-03-20 15:19:40,043 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 6.2727272727272725) internal successors, (138), 21 states have internal predecessors, (138), 21 states have call successors, (23), 21 states have call predecessors, (23), 19 states have return successors, (21), 19 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-20 15:19:40,043 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 211 transitions. [2022-03-20 15:19:40,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-03-20 15:19:40,044 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:40,044 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:40,050 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-20 15:19:40,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:40,250 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:40,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:40,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 37 times [2022-03-20 15:19:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1968243950] [2022-03-20 15:19:40,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:40,251 INFO L85 PathProgramCache]: Analyzing trace with hash 1522264156, now seen corresponding path program 38 times [2022-03-20 15:19:40,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:40,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520311242] [2022-03-20 15:19:40,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:40,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:40,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:40,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [607693272] [2022-03-20 15:19:40,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:40,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:40,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:40,261 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:40,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 15:19:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:40,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-20 15:19:40,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:40,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 1577 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:40,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1619 backedges. 38 proven. 893 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2022-03-20 15:19:41,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520311242] [2022-03-20 15:19:41,458 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:41,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607693272] [2022-03-20 15:19:41,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607693272] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:41,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:41,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2022-03-20 15:19:41,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:41,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1968243950] [2022-03-20 15:19:41,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1968243950] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:41,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:41,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 15:19:41,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251905475] [2022-03-20 15:19:41,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:41,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 15:19:41,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:41,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 15:19:41,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=1026, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 15:19:41,461 INFO L87 Difference]: Start difference. First operand 191 states and 211 transitions. Second operand has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:19:41,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:41,819 INFO L93 Difference]: Finished difference Result 205 states and 226 transitions. [2022-03-20 15:19:41,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 15:19:41,820 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) Word has length 194 [2022-03-20 15:19:41,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:41,821 INFO L225 Difference]: With dead ends: 205 [2022-03-20 15:19:41,821 INFO L226 Difference]: Without dead ends: 200 [2022-03-20 15:19:41,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 345 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1683, Invalid=2223, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 15:19:41,823 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 62 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:41,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 228 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-03-20 15:19:41,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-03-20 15:19:41,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.138157894736842) internal successors, (173), 152 states have internal predecessors, (173), 25 states have call successors, (25), 24 states have call predecessors, (25), 22 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-20 15:19:41,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 221 transitions. [2022-03-20 15:19:41,848 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 221 transitions. Word has length 194 [2022-03-20 15:19:41,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:41,848 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 221 transitions. [2022-03-20 15:19:41,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.304347826086956) internal successors, (145), 22 states have internal predecessors, (145), 22 states have call successors, (24), 22 states have call predecessors, (24), 20 states have return successors, (22), 20 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-20 15:19:41,848 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 221 transitions. [2022-03-20 15:19:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 15:19:41,849 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:41,850 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:41,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:42,054 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:42,055 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:42,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:42,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 39 times [2022-03-20 15:19:42,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:42,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546182556] [2022-03-20 15:19:42,056 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1934081686, now seen corresponding path program 40 times [2022-03-20 15:19:42,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754433071] [2022-03-20 15:19:42,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:42,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:42,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:42,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075028615] [2022-03-20 15:19:42,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:42,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:42,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:42,064 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:42,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 15:19:42,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:42,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:42,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 493 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-20 15:19:42,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:42,660 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 1750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:42,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:43,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1794 backedges. 40 proven. 990 refuted. 0 times theorem prover too weak. 764 trivial. 0 not checked. [2022-03-20 15:19:43,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754433071] [2022-03-20 15:19:43,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075028615] [2022-03-20 15:19:43,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075028615] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:43,379 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:43,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2022-03-20 15:19:43,379 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:43,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546182556] [2022-03-20 15:19:43,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546182556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:43,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:43,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 15:19:43,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103786789] [2022-03-20 15:19:43,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:43,380 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 15:19:43,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 15:19:43,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=951, Invalid=1119, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 15:19:43,381 INFO L87 Difference]: Start difference. First operand 200 states and 221 transitions. Second operand has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 15:19:43,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:43,691 INFO L93 Difference]: Finished difference Result 214 states and 236 transitions. [2022-03-20 15:19:43,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 15:19:43,692 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) Word has length 203 [2022-03-20 15:19:43,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:43,693 INFO L225 Difference]: With dead ends: 214 [2022-03-20 15:19:43,693 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 15:19:43,694 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 361 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1851, Invalid=2439, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 15:19:43,694 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 69 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:43,695 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 242 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:43,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 15:19:43,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 15:19:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 159 states have (on average 1.1383647798742138) internal successors, (181), 159 states have internal predecessors, (181), 26 states have call successors, (26), 25 states have call predecessors, (26), 23 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-20 15:19:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 231 transitions. [2022-03-20 15:19:43,726 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 231 transitions. Word has length 203 [2022-03-20 15:19:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:43,727 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 231 transitions. [2022-03-20 15:19:43,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 6.333333333333333) internal successors, (152), 23 states have internal predecessors, (152), 23 states have call successors, (25), 23 states have call predecessors, (25), 21 states have return successors, (23), 21 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-20 15:19:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 231 transitions. [2022-03-20 15:19:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-20 15:19:43,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:43,728 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:43,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:43,935 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:43,935 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:43,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:43,935 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 41 times [2022-03-20 15:19:43,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:43,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1326349492] [2022-03-20 15:19:43,936 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:43,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2075113060, now seen corresponding path program 42 times [2022-03-20 15:19:43,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:43,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110958283] [2022-03-20 15:19:43,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:43,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:43,943 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:43,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896997455] [2022-03-20 15:19:43,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:43,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:43,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:43,944 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:43,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 15:19:47,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-03-20 15:19:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 47 conjunts are in the unsatisfiable core [2022-03-20 15:19:47,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1932 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:47,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:48,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1978 backedges. 42 proven. 1092 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2022-03-20 15:19:48,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:48,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110958283] [2022-03-20 15:19:48,554 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:48,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896997455] [2022-03-20 15:19:48,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896997455] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:48,554 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:48,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2022-03-20 15:19:48,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1326349492] [2022-03-20 15:19:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1326349492] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:48,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:48,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 15:19:48,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347748783] [2022-03-20 15:19:48,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:48,555 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 15:19:48,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:48,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 15:19:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=1216, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 15:19:48,557 INFO L87 Difference]: Start difference. First operand 209 states and 231 transitions. Second operand has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 15:19:48,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:48,959 INFO L93 Difference]: Finished difference Result 223 states and 246 transitions. [2022-03-20 15:19:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 15:19:48,959 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 212 [2022-03-20 15:19:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:48,960 INFO L225 Difference]: With dead ends: 223 [2022-03-20 15:19:48,960 INFO L226 Difference]: Without dead ends: 218 [2022-03-20 15:19:48,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 377 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2027, Invalid=2665, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 15:19:48,963 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 68 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:48,964 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 244 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:48,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-20 15:19:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-20 15:19:48,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-20 15:19:49,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-20 15:19:49,001 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 212 [2022-03-20 15:19:49,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:49,001 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-20 15:19:49,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.36) internal successors, (159), 24 states have internal predecessors, (159), 24 states have call successors, (26), 24 states have call predecessors, (26), 22 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-20 15:19:49,002 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-20 15:19:49,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-20 15:19:49,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:49,005 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:49,015 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:49,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-20 15:19:49,213 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:49,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:49,213 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 43 times [2022-03-20 15:19:49,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:49,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [141995246] [2022-03-20 15:19:49,214 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 44 times [2022-03-20 15:19:49,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:49,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865730189] [2022-03-20 15:19:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:49,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:49,226 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:49,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [553242667] [2022-03-20 15:19:49,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:19:49,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:49,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:49,227 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:49,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 15:19:49,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:19:49,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:49,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 15:19:49,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:49,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:50,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-20 15:19:50,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:50,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865730189] [2022-03-20 15:19:50,626 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553242667] [2022-03-20 15:19:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553242667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:50,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:50,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-20 15:19:50,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:50,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [141995246] [2022-03-20 15:19:50,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [141995246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:50,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:50,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 15:19:50,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850560353] [2022-03-20 15:19:50,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:50,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 15:19:50,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:50,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 15:19:50,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 15:19:50,629 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 15:19:50,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:50,998 INFO L93 Difference]: Finished difference Result 232 states and 256 transitions. [2022-03-20 15:19:50,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 15:19:50,998 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) Word has length 221 [2022-03-20 15:19:50,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:50,999 INFO L225 Difference]: With dead ends: 232 [2022-03-20 15:19:51,000 INFO L226 Difference]: Without dead ends: 227 [2022-03-20 15:19:51,001 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2901, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 15:19:51,002 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 78 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:51,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 270 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:51,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-03-20 15:19:51,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2022-03-20 15:19:51,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 173 states have (on average 1.138728323699422) internal successors, (197), 173 states have internal predecessors, (197), 28 states have call successors, (28), 27 states have call predecessors, (28), 25 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-20 15:19:51,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 251 transitions. [2022-03-20 15:19:51,030 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 251 transitions. Word has length 221 [2022-03-20 15:19:51,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:51,030 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 251 transitions. [2022-03-20 15:19:51,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 6.384615384615385) internal successors, (166), 25 states have internal predecessors, (166), 25 states have call successors, (27), 25 states have call predecessors, (27), 23 states have return successors, (25), 23 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-20 15:19:51,031 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 251 transitions. [2022-03-20 15:19:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-03-20 15:19:51,032 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:51,032 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:51,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 15:19:51,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-20 15:19:51,247 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 45 times [2022-03-20 15:19:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:51,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [454067377] [2022-03-20 15:19:51,248 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash -360260900, now seen corresponding path program 46 times [2022-03-20 15:19:51,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:51,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387947809] [2022-03-20 15:19:51,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:51,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:51,256 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:51,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1691033957] [2022-03-20 15:19:51,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:19:51,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:51,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:51,258 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:51,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 15:19:51,401 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:19:51,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:19:51,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 51 conjunts are in the unsatisfiable core [2022-03-20 15:19:51,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:19:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 2323 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:19:51,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:19:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2373 backedges. 46 proven. 1311 refuted. 0 times theorem prover too weak. 1016 trivial. 0 not checked. [2022-03-20 15:19:52,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:19:52,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387947809] [2022-03-20 15:19:52,851 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:19:52,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691033957] [2022-03-20 15:19:52,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691033957] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:19:52,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:19:52,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 52 [2022-03-20 15:19:52,852 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:19:52,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [454067377] [2022-03-20 15:19:52,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [454067377] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:19:52,852 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:19:52,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 15:19:52,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692919064] [2022-03-20 15:19:52,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:19:52,853 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 15:19:52,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:52,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 15:19:52,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1230, Invalid=1422, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 15:19:52,854 INFO L87 Difference]: Start difference. First operand 227 states and 251 transitions. Second operand has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 15:19:53,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:19:53,287 INFO L93 Difference]: Finished difference Result 241 states and 266 transitions. [2022-03-20 15:19:53,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 15:19:53,288 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) Word has length 230 [2022-03-20 15:19:53,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:19:53,289 INFO L225 Difference]: With dead ends: 241 [2022-03-20 15:19:53,289 INFO L226 Difference]: Without dead ends: 236 [2022-03-20 15:19:53,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 409 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2403, Invalid=3147, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 15:19:53,290 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 90 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:19:53,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 260 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:19:53,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-20 15:19:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-03-20 15:19:53,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 180 states have (on average 1.1388888888888888) internal successors, (205), 180 states have internal predecessors, (205), 29 states have call successors, (29), 28 states have call predecessors, (29), 26 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-20 15:19:53,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-03-20 15:19:53,312 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 230 [2022-03-20 15:19:53,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:19:53,313 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-03-20 15:19:53,313 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 6.407407407407407) internal successors, (173), 26 states have internal predecessors, (173), 26 states have call successors, (28), 26 states have call predecessors, (28), 24 states have return successors, (26), 24 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-20 15:19:53,313 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-03-20 15:19:53,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-03-20 15:19:53,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:19:53,314 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:19:53,323 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 15:19:53,520 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-20 15:19:53,520 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:19:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:19:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 47 times [2022-03-20 15:19:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:19:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539773890] [2022-03-20 15:19:53,521 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:19:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1738171370, now seen corresponding path program 48 times [2022-03-20 15:19:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:19:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187209976] [2022-03-20 15:19:53,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:19:53,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:19:53,534 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:19:53,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399093301] [2022-03-20 15:19:53,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:19:53,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:19:53,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:19:53,536 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:19:53,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 15:20:05,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-20 15:20:05,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:05,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-20 15:20:05,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:06,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 2532 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:06,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:07,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2584 backedges. 48 proven. 1428 refuted. 0 times theorem prover too weak. 1108 trivial. 0 not checked. [2022-03-20 15:20:07,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187209976] [2022-03-20 15:20:07,474 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399093301] [2022-03-20 15:20:07,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399093301] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:07,474 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:07,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2022-03-20 15:20:07,474 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:07,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539773890] [2022-03-20 15:20:07,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539773890] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:07,475 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:07,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 15:20:07,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624990964] [2022-03-20 15:20:07,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:07,475 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 15:20:07,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:07,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 15:20:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1331, Invalid=1531, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 15:20:07,476 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 15:20:07,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:07,937 INFO L93 Difference]: Finished difference Result 250 states and 276 transitions. [2022-03-20 15:20:07,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 15:20:07,937 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) Word has length 239 [2022-03-20 15:20:07,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:07,939 INFO L225 Difference]: With dead ends: 250 [2022-03-20 15:20:07,939 INFO L226 Difference]: Without dead ends: 245 [2022-03-20 15:20:07,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 425 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2603, Invalid=3403, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 15:20:07,940 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 107 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:07,940 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 274 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:20:07,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-20 15:20:07,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-03-20 15:20:07,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 187 states have (on average 1.13903743315508) internal successors, (213), 187 states have internal predecessors, (213), 30 states have call successors, (30), 29 states have call predecessors, (30), 27 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 15:20:07,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 271 transitions. [2022-03-20 15:20:07,962 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 271 transitions. Word has length 239 [2022-03-20 15:20:07,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:07,962 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 271 transitions. [2022-03-20 15:20:07,962 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 6.428571428571429) internal successors, (180), 27 states have internal predecessors, (180), 27 states have call successors, (29), 27 states have call predecessors, (29), 25 states have return successors, (27), 25 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-20 15:20:07,962 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 271 transitions. [2022-03-20 15:20:07,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-03-20 15:20:07,963 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:07,963 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:07,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:08,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-20 15:20:08,164 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:08,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:08,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 49 times [2022-03-20 15:20:08,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:08,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2127817940] [2022-03-20 15:20:08,165 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:08,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1530108956, now seen corresponding path program 50 times [2022-03-20 15:20:08,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:08,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002448327] [2022-03-20 15:20:08,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:08,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:08,171 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:08,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072817586] [2022-03-20 15:20:08,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:20:08,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:08,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:08,173 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:08,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 15:20:08,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:20:08,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:08,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 55 conjunts are in the unsatisfiable core [2022-03-20 15:20:08,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:08,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 2750 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:08,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:09,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2804 backedges. 50 proven. 1550 refuted. 0 times theorem prover too weak. 1204 trivial. 0 not checked. [2022-03-20 15:20:09,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:09,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002448327] [2022-03-20 15:20:09,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:09,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072817586] [2022-03-20 15:20:09,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072817586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:09,807 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 56 [2022-03-20 15:20:09,807 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:09,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2127817940] [2022-03-20 15:20:09,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2127817940] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:09,807 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:09,807 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 15:20:09,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980071746] [2022-03-20 15:20:09,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:09,808 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 15:20:09,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 15:20:09,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1436, Invalid=1644, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 15:20:09,809 INFO L87 Difference]: Start difference. First operand 245 states and 271 transitions. Second operand has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 15:20:10,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:10,243 INFO L93 Difference]: Finished difference Result 259 states and 286 transitions. [2022-03-20 15:20:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 15:20:10,243 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) Word has length 248 [2022-03-20 15:20:10,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:10,245 INFO L225 Difference]: With dead ends: 259 [2022-03-20 15:20:10,245 INFO L226 Difference]: Without dead ends: 254 [2022-03-20 15:20:10,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 441 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2811, Invalid=3669, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 15:20:10,246 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 105 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:10,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 282 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:20:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-03-20 15:20:10,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2022-03-20 15:20:10,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 194 states have (on average 1.1391752577319587) internal successors, (221), 194 states have internal predecessors, (221), 31 states have call successors, (31), 30 states have call predecessors, (31), 28 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-20 15:20:10,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 281 transitions. [2022-03-20 15:20:10,290 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 281 transitions. Word has length 248 [2022-03-20 15:20:10,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:10,291 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 281 transitions. [2022-03-20 15:20:10,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.448275862068965) internal successors, (187), 28 states have internal predecessors, (187), 28 states have call successors, (30), 28 states have call predecessors, (30), 26 states have return successors, (28), 26 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-20 15:20:10,291 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 281 transitions. [2022-03-20 15:20:10,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-03-20 15:20:10,292 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:10,292 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 26, 26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:10,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:10,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-20 15:20:10,507 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:10,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 51 times [2022-03-20 15:20:10,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:10,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [827418168] [2022-03-20 15:20:10,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:10,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1713487146, now seen corresponding path program 52 times [2022-03-20 15:20:10,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:10,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201614657] [2022-03-20 15:20:10,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:10,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:10,517 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:10,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651385858] [2022-03-20 15:20:10,521 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:20:10,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:10,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:10,522 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:10,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 15:20:10,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:20:10,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:10,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 15:20:10,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:11,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 2977 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:11,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3033 backedges. 52 proven. 1677 refuted. 0 times theorem prover too weak. 1304 trivial. 0 not checked. [2022-03-20 15:20:12,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201614657] [2022-03-20 15:20:12,411 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:12,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651385858] [2022-03-20 15:20:12,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651385858] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:12,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:12,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 58 [2022-03-20 15:20:12,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:12,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [827418168] [2022-03-20 15:20:12,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [827418168] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:12,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:12,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 15:20:12,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400420748] [2022-03-20 15:20:12,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:12,416 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 15:20:12,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:12,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 15:20:12,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1545, Invalid=1761, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 15:20:12,417 INFO L87 Difference]: Start difference. First operand 254 states and 281 transitions. Second operand has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 15:20:12,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:12,900 INFO L93 Difference]: Finished difference Result 268 states and 296 transitions. [2022-03-20 15:20:12,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 15:20:12,902 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) Word has length 257 [2022-03-20 15:20:12,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:12,903 INFO L225 Difference]: With dead ends: 268 [2022-03-20 15:20:12,903 INFO L226 Difference]: Without dead ends: 263 [2022-03-20 15:20:12,905 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3027, Invalid=3945, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 15:20:12,905 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 96 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:12,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 296 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:20:12,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-03-20 15:20:12,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-03-20 15:20:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 201 states have (on average 1.1393034825870647) internal successors, (229), 201 states have internal predecessors, (229), 32 states have call successors, (32), 31 states have call predecessors, (32), 29 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 15:20:12,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 291 transitions. [2022-03-20 15:20:12,942 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 291 transitions. Word has length 257 [2022-03-20 15:20:12,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:12,943 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 291 transitions. [2022-03-20 15:20:12,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 6.466666666666667) internal successors, (194), 29 states have internal predecessors, (194), 29 states have call successors, (31), 29 states have call predecessors, (31), 27 states have return successors, (29), 27 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-20 15:20:12,943 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 291 transitions. [2022-03-20 15:20:12,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-03-20 15:20:12,944 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:12,945 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 27, 27, 27, 27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:12,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:13,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:13,151 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:13,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 53 times [2022-03-20 15:20:13,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:13,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [342864652] [2022-03-20 15:20:13,152 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:13,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1462406492, now seen corresponding path program 54 times [2022-03-20 15:20:13,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:13,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877763238] [2022-03-20 15:20:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:13,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:13,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:13,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [364803171] [2022-03-20 15:20:13,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:20:13,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:13,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:13,161 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:13,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 15:20:19,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2022-03-20 15:20:19,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:19,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 59 conjunts are in the unsatisfiable core [2022-03-20 15:20:19,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:20,502 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 3213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:20,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:21,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3271 backedges. 54 proven. 1809 refuted. 0 times theorem prover too weak. 1408 trivial. 0 not checked. [2022-03-20 15:20:21,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877763238] [2022-03-20 15:20:21,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364803171] [2022-03-20 15:20:21,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364803171] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:21,585 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:21,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 60 [2022-03-20 15:20:21,585 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:21,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [342864652] [2022-03-20 15:20:21,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [342864652] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:21,585 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:21,585 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 15:20:21,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698751544] [2022-03-20 15:20:21,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:21,586 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 15:20:21,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:21,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 15:20:21,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1658, Invalid=1882, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 15:20:21,587 INFO L87 Difference]: Start difference. First operand 263 states and 291 transitions. Second operand has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 15:20:22,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:22,063 INFO L93 Difference]: Finished difference Result 277 states and 306 transitions. [2022-03-20 15:20:22,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 15:20:22,065 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) Word has length 266 [2022-03-20 15:20:22,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:22,066 INFO L225 Difference]: With dead ends: 277 [2022-03-20 15:20:22,066 INFO L226 Difference]: Without dead ends: 272 [2022-03-20 15:20:22,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=3251, Invalid=4231, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 15:20:22,067 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 92 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:22,067 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 310 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:20:22,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-20 15:20:22,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-03-20 15:20:22,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 208 states have (on average 1.1394230769230769) internal successors, (237), 208 states have internal predecessors, (237), 33 states have call successors, (33), 32 states have call predecessors, (33), 30 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-20 15:20:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 301 transitions. [2022-03-20 15:20:22,091 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 301 transitions. Word has length 266 [2022-03-20 15:20:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:22,091 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 301 transitions. [2022-03-20 15:20:22,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 6.483870967741935) internal successors, (201), 30 states have internal predecessors, (201), 30 states have call successors, (32), 30 states have call predecessors, (32), 28 states have return successors, (30), 28 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-20 15:20:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 301 transitions. [2022-03-20 15:20:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-20 15:20:22,093 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:22,093 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 28, 28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:22,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:22,302 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:22,303 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:22,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:22,303 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 55 times [2022-03-20 15:20:22,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:22,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1073422368] [2022-03-20 15:20:22,304 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:22,304 INFO L85 PathProgramCache]: Analyzing trace with hash -394085994, now seen corresponding path program 56 times [2022-03-20 15:20:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:22,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245169448] [2022-03-20 15:20:22,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:22,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:22,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:22,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249326029] [2022-03-20 15:20:22,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:20:22,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:22,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:22,329 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:22,330 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 15:20:22,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:20:22,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:22,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 61 conjunts are in the unsatisfiable core [2022-03-20 15:20:22,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:23,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 3458 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:23,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:24,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3518 backedges. 56 proven. 1946 refuted. 0 times theorem prover too weak. 1516 trivial. 0 not checked. [2022-03-20 15:20:24,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245169448] [2022-03-20 15:20:24,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249326029] [2022-03-20 15:20:24,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249326029] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:24,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:24,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 62 [2022-03-20 15:20:24,353 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:24,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1073422368] [2022-03-20 15:20:24,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1073422368] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:24,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:24,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 15:20:24,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219641734] [2022-03-20 15:20:24,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:24,354 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 15:20:24,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 15:20:24,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1775, Invalid=2007, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 15:20:24,357 INFO L87 Difference]: Start difference. First operand 272 states and 301 transitions. Second operand has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 15:20:24,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:24,949 INFO L93 Difference]: Finished difference Result 286 states and 316 transitions. [2022-03-20 15:20:24,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 15:20:24,949 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) Word has length 275 [2022-03-20 15:20:24,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:24,950 INFO L225 Difference]: With dead ends: 286 [2022-03-20 15:20:24,950 INFO L226 Difference]: Without dead ends: 281 [2022-03-20 15:20:24,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3483, Invalid=4527, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 15:20:24,951 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 101 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 300 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:24,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 300 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:20:24,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-20 15:20:24,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-03-20 15:20:24,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 215 states have (on average 1.1395348837209303) internal successors, (245), 215 states have internal predecessors, (245), 34 states have call successors, (34), 33 states have call predecessors, (34), 31 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 15:20:24,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 311 transitions. [2022-03-20 15:20:24,977 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 311 transitions. Word has length 275 [2022-03-20 15:20:24,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:24,977 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 311 transitions. [2022-03-20 15:20:24,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 6.5) internal successors, (208), 31 states have internal predecessors, (208), 31 states have call successors, (33), 31 states have call predecessors, (33), 29 states have return successors, (31), 29 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-20 15:20:24,977 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 311 transitions. [2022-03-20 15:20:24,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-03-20 15:20:24,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:24,979 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 29, 29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:24,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:25,179 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:25,179 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:25,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 57 times [2022-03-20 15:20:25,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:25,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942324779] [2022-03-20 15:20:25,180 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:25,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1379905180, now seen corresponding path program 58 times [2022-03-20 15:20:25,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:25,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660672309] [2022-03-20 15:20:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:25,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:25,190 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:25,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182652835] [2022-03-20 15:20:25,190 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:20:25,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:25,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:25,192 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:25,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 15:20:25,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:20:25,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:25,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 63 conjunts are in the unsatisfiable core [2022-03-20 15:20:25,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 3712 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:26,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:27,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3774 backedges. 58 proven. 2088 refuted. 0 times theorem prover too weak. 1628 trivial. 0 not checked. [2022-03-20 15:20:27,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:27,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660672309] [2022-03-20 15:20:27,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:27,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182652835] [2022-03-20 15:20:27,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182652835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:27,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 64 [2022-03-20 15:20:27,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942324779] [2022-03-20 15:20:27,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942324779] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:27,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 15:20:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044808965] [2022-03-20 15:20:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:27,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 15:20:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 15:20:27,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1896, Invalid=2136, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 15:20:27,673 INFO L87 Difference]: Start difference. First operand 281 states and 311 transitions. Second operand has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 15:20:28,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:28,190 INFO L93 Difference]: Finished difference Result 295 states and 326 transitions. [2022-03-20 15:20:28,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 15:20:28,190 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) Word has length 284 [2022-03-20 15:20:28,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:28,191 INFO L225 Difference]: With dead ends: 295 [2022-03-20 15:20:28,192 INFO L226 Difference]: Without dead ends: 290 [2022-03-20 15:20:28,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 505 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3723, Invalid=4833, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 15:20:28,193 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 127 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:28,193 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 320 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 15:20:28,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-20 15:20:28,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-03-20 15:20:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 222 states have (on average 1.1396396396396395) internal successors, (253), 222 states have internal predecessors, (253), 35 states have call successors, (35), 34 states have call predecessors, (35), 32 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-20 15:20:28,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 321 transitions. [2022-03-20 15:20:28,225 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 321 transitions. Word has length 284 [2022-03-20 15:20:28,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:28,226 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 321 transitions. [2022-03-20 15:20:28,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 6.515151515151516) internal successors, (215), 32 states have internal predecessors, (215), 32 states have call successors, (34), 32 states have call predecessors, (34), 30 states have return successors, (32), 30 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-20 15:20:28,226 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 321 transitions. [2022-03-20 15:20:28,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-20 15:20:28,227 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:28,227 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 30, 30, 30, 30, 30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:28,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:28,434 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-20 15:20:28,434 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:28,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 59 times [2022-03-20 15:20:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:28,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [769184007] [2022-03-20 15:20:28,435 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:28,435 INFO L85 PathProgramCache]: Analyzing trace with hash 520028246, now seen corresponding path program 60 times [2022-03-20 15:20:28,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:28,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643306506] [2022-03-20 15:20:28,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:28,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:28,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:28,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1874186503] [2022-03-20 15:20:28,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:20:28,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:28,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:28,443 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:28,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 15:20:33,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-20 15:20:33,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:33,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 65 conjunts are in the unsatisfiable core [2022-03-20 15:20:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:34,122 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 3975 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:34,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 4039 backedges. 60 proven. 2235 refuted. 0 times theorem prover too weak. 1744 trivial. 0 not checked. [2022-03-20 15:20:35,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643306506] [2022-03-20 15:20:35,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:35,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874186503] [2022-03-20 15:20:35,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874186503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:35,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:35,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 66 [2022-03-20 15:20:35,478 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:35,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [769184007] [2022-03-20 15:20:35,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [769184007] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:35,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:35,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 15:20:35,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64068192] [2022-03-20 15:20:35,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:35,479 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 15:20:35,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:35,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 15:20:35,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 15:20:35,480 INFO L87 Difference]: Start difference. First operand 290 states and 321 transitions. Second operand has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 15:20:36,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:36,066 INFO L93 Difference]: Finished difference Result 304 states and 336 transitions. [2022-03-20 15:20:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 15:20:36,067 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) Word has length 293 [2022-03-20 15:20:36,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:36,071 INFO L225 Difference]: With dead ends: 304 [2022-03-20 15:20:36,071 INFO L226 Difference]: Without dead ends: 299 [2022-03-20 15:20:36,072 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 521 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3971, Invalid=5149, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 15:20:36,073 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 115 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:36,073 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 316 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:20:36,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-03-20 15:20:36,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2022-03-20 15:20:36,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 229 states have (on average 1.1397379912663756) internal successors, (261), 229 states have internal predecessors, (261), 36 states have call successors, (36), 35 states have call predecessors, (36), 33 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 15:20:36,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 331 transitions. [2022-03-20 15:20:36,107 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 331 transitions. Word has length 293 [2022-03-20 15:20:36,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:36,107 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 331 transitions. [2022-03-20 15:20:36,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 6.529411764705882) internal successors, (222), 33 states have internal predecessors, (222), 33 states have call successors, (35), 33 states have call predecessors, (35), 31 states have return successors, (33), 31 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-20 15:20:36,107 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 331 transitions. [2022-03-20 15:20:36,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2022-03-20 15:20:36,109 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:36,109 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 31, 31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:36,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:36,317 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:36,317 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:36,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 61 times [2022-03-20 15:20:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [830484672] [2022-03-20 15:20:36,318 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:36,318 INFO L85 PathProgramCache]: Analyzing trace with hash -213450788, now seen corresponding path program 62 times [2022-03-20 15:20:36,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62128025] [2022-03-20 15:20:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:36,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:36,326 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:36,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1389475241] [2022-03-20 15:20:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:20:36,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:36,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:36,327 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:36,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 15:20:36,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:20:36,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:36,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 15:20:36,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:37,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 4247 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:37,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4313 backedges. 62 proven. 2387 refuted. 0 times theorem prover too weak. 1864 trivial. 0 not checked. [2022-03-20 15:20:38,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62128025] [2022-03-20 15:20:38,642 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:38,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389475241] [2022-03-20 15:20:38,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389475241] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:38,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:38,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 68 [2022-03-20 15:20:38,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:38,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [830484672] [2022-03-20 15:20:38,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [830484672] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:38,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:38,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 15:20:38,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327504113] [2022-03-20 15:20:38,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:38,644 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 15:20:38,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 15:20:38,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2150, Invalid=2406, Unknown=0, NotChecked=0, Total=4556 [2022-03-20 15:20:38,645 INFO L87 Difference]: Start difference. First operand 299 states and 331 transitions. Second operand has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 15:20:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:39,235 INFO L93 Difference]: Finished difference Result 313 states and 346 transitions. [2022-03-20 15:20:39,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 15:20:39,236 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) Word has length 302 [2022-03-20 15:20:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:39,237 INFO L225 Difference]: With dead ends: 313 [2022-03-20 15:20:39,237 INFO L226 Difference]: Without dead ends: 308 [2022-03-20 15:20:39,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 634 GetRequests, 537 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4227, Invalid=5475, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 15:20:39,238 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 134 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:39,238 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 318 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:20:39,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-03-20 15:20:39,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-03-20 15:20:39,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 236 states have (on average 1.1398305084745763) internal successors, (269), 236 states have internal predecessors, (269), 37 states have call successors, (37), 36 states have call predecessors, (37), 34 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 15:20:39,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 341 transitions. [2022-03-20 15:20:39,277 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 341 transitions. Word has length 302 [2022-03-20 15:20:39,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:39,278 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 341 transitions. [2022-03-20 15:20:39,278 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 6.542857142857143) internal successors, (229), 34 states have internal predecessors, (229), 34 states have call successors, (36), 34 states have call predecessors, (36), 32 states have return successors, (34), 32 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-20 15:20:39,278 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 341 transitions. [2022-03-20 15:20:39,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-03-20 15:20:39,279 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:39,279 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 32, 32, 32, 32, 32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:39,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:39,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-20 15:20:39,499 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:39,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 63 times [2022-03-20 15:20:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:39,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2038480257] [2022-03-20 15:20:39,500 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash 83826454, now seen corresponding path program 64 times [2022-03-20 15:20:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:39,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647493678] [2022-03-20 15:20:39,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:39,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:39,510 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:39,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104559463] [2022-03-20 15:20:39,510 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:20:39,511 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:39,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:39,512 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 15:20:39,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:20:39,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:20:39,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 15:20:39,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:20:40,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 4528 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:20:40,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:20:42,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4596 backedges. 64 proven. 2544 refuted. 0 times theorem prover too weak. 1988 trivial. 0 not checked. [2022-03-20 15:20:42,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:20:42,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647493678] [2022-03-20 15:20:42,113 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:20:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104559463] [2022-03-20 15:20:42,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104559463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:20:42,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:20:42,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 70 [2022-03-20 15:20:42,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:20:42,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2038480257] [2022-03-20 15:20:42,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2038480257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:20:42,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:20:42,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 15:20:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344937913] [2022-03-20 15:20:42,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:20:42,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 15:20:42,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 15:20:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2283, Invalid=2547, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 15:20:42,116 INFO L87 Difference]: Start difference. First operand 308 states and 341 transitions. Second operand has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 15:20:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:20:42,722 INFO L93 Difference]: Finished difference Result 322 states and 356 transitions. [2022-03-20 15:20:42,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 15:20:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) Word has length 311 [2022-03-20 15:20:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:20:42,724 INFO L225 Difference]: With dead ends: 322 [2022-03-20 15:20:42,724 INFO L226 Difference]: Without dead ends: 317 [2022-03-20 15:20:42,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 553 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4491, Invalid=5811, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 15:20:42,726 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 104 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:20:42,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 332 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:20:42,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-03-20 15:20:42,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2022-03-20 15:20:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 243 states have (on average 1.139917695473251) internal successors, (277), 243 states have internal predecessors, (277), 38 states have call successors, (38), 37 states have call predecessors, (38), 35 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-20 15:20:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 351 transitions. [2022-03-20 15:20:42,768 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 351 transitions. Word has length 311 [2022-03-20 15:20:42,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:20:42,768 INFO L478 AbstractCegarLoop]: Abstraction has 317 states and 351 transitions. [2022-03-20 15:20:42,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 6.555555555555555) internal successors, (236), 35 states have internal predecessors, (236), 35 states have call successors, (37), 35 states have call predecessors, (37), 33 states have return successors, (35), 33 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-20 15:20:42,768 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 351 transitions. [2022-03-20 15:20:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-03-20 15:20:42,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:20:42,770 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 33, 33, 33, 33, 33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:20:42,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-20 15:20:42,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:42,976 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:20:42,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:20:42,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 65 times [2022-03-20 15:20:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:20:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2090585695] [2022-03-20 15:20:42,977 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:20:42,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1410629916, now seen corresponding path program 66 times [2022-03-20 15:20:42,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:20:42,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836592251] [2022-03-20 15:20:42,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:20:42,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:20:42,985 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:20:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [581162568] [2022-03-20 15:20:42,985 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:20:42,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:20:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:20:42,986 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:20:42,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 15:25:46,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2022-03-20 15:25:46,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:25:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 15:25:46,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:25:47,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 4818 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:25:47,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:25:49,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4888 backedges. 66 proven. 2706 refuted. 0 times theorem prover too weak. 2116 trivial. 0 not checked. [2022-03-20 15:25:49,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:25:49,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836592251] [2022-03-20 15:25:49,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:25:49,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581162568] [2022-03-20 15:25:49,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581162568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:25:49,184 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:25:49,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 72 [2022-03-20 15:25:49,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:25:49,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2090585695] [2022-03-20 15:25:49,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2090585695] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:25:49,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:25:49,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 15:25:49,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876203731] [2022-03-20 15:25:49,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:25:49,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 15:25:49,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:25:49,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 15:25:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2420, Invalid=2692, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 15:25:49,188 INFO L87 Difference]: Start difference. First operand 317 states and 351 transitions. Second operand has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 15:25:49,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:25:49,846 INFO L93 Difference]: Finished difference Result 331 states and 366 transitions. [2022-03-20 15:25:49,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 15:25:49,847 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) Word has length 320 [2022-03-20 15:25:49,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:25:49,848 INFO L225 Difference]: With dead ends: 331 [2022-03-20 15:25:49,848 INFO L226 Difference]: Without dead ends: 326 [2022-03-20 15:25:49,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 672 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 15:25:49,849 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 108 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:25:49,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 346 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:25:49,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-20 15:25:49,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2022-03-20 15:25:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 250 states have (on average 1.14) internal successors, (285), 250 states have internal predecessors, (285), 39 states have call successors, (39), 38 states have call predecessors, (39), 36 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-20 15:25:49,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 361 transitions. [2022-03-20 15:25:49,885 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 361 transitions. Word has length 320 [2022-03-20 15:25:49,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:25:49,886 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 361 transitions. [2022-03-20 15:25:49,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 6.5675675675675675) internal successors, (243), 36 states have internal predecessors, (243), 36 states have call successors, (38), 36 states have call predecessors, (38), 34 states have return successors, (36), 34 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-20 15:25:49,886 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 361 transitions. [2022-03-20 15:25:49,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-03-20 15:25:49,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:25:49,888 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 34, 34, 34, 34, 34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:25:49,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-20 15:25:50,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 15:25:50,115 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:25:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:25:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 67 times [2022-03-20 15:25:50,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:25:50,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [978866604] [2022-03-20 15:25:50,116 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:25:50,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1328479702, now seen corresponding path program 68 times [2022-03-20 15:25:50,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:25:50,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559759116] [2022-03-20 15:25:50,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:25:50,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:25:50,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:25:50,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [244458098] [2022-03-20 15:25:50,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:25:50,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:25:50,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:25:50,125 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:25:50,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 15:25:50,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:25:50,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:25:50,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 73 conjunts are in the unsatisfiable core [2022-03-20 15:25:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:25:51,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 5117 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:25:51,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:25:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5189 backedges. 68 proven. 2873 refuted. 0 times theorem prover too weak. 2248 trivial. 0 not checked. [2022-03-20 15:25:52,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:25:52,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559759116] [2022-03-20 15:25:52,669 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:25:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244458098] [2022-03-20 15:25:52,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244458098] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:25:52,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:25:52,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 74 [2022-03-20 15:25:52,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:25:52,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [978866604] [2022-03-20 15:25:52,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [978866604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:25:52,669 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:25:52,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 15:25:52,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374322096] [2022-03-20 15:25:52,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:25:52,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 15:25:52,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:25:52,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 15:25:52,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2561, Invalid=2841, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 15:25:52,672 INFO L87 Difference]: Start difference. First operand 326 states and 361 transitions. Second operand has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 15:25:53,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:25:53,404 INFO L93 Difference]: Finished difference Result 340 states and 376 transitions. [2022-03-20 15:25:53,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 15:25:53,404 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) Word has length 329 [2022-03-20 15:25:53,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:25:53,405 INFO L225 Difference]: With dead ends: 340 [2022-03-20 15:25:53,405 INFO L226 Difference]: Without dead ends: 335 [2022-03-20 15:25:53,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 691 GetRequests, 585 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=5043, Invalid=6513, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 15:25:53,406 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 106 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:25:53,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 360 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:25:53,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-20 15:25:53,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-03-20 15:25:53,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 257 states have (on average 1.140077821011673) internal successors, (293), 257 states have internal predecessors, (293), 40 states have call successors, (40), 39 states have call predecessors, (40), 37 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-20 15:25:53,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 371 transitions. [2022-03-20 15:25:53,448 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 371 transitions. Word has length 329 [2022-03-20 15:25:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:25:53,448 INFO L478 AbstractCegarLoop]: Abstraction has 335 states and 371 transitions. [2022-03-20 15:25:53,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 6.578947368421052) internal successors, (250), 37 states have internal predecessors, (250), 37 states have call successors, (39), 37 states have call predecessors, (39), 35 states have return successors, (37), 35 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-20 15:25:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 371 transitions. [2022-03-20 15:25:53,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-03-20 15:25:53,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:25:53,450 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 35, 35, 35, 35, 35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:25:53,477 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-20 15:25:53,663 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 15:25:53,663 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:25:53,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:25:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 69 times [2022-03-20 15:25:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:25:53,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572217471] [2022-03-20 15:25:53,664 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:25:53,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1098658396, now seen corresponding path program 70 times [2022-03-20 15:25:53,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:25:53,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351792373] [2022-03-20 15:25:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:25:53,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:25:53,671 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:25:53,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1429354235] [2022-03-20 15:25:53,672 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:25:53,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:25:53,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:25:53,673 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:25:53,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 15:25:53,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:25:53,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:25:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 75 conjunts are in the unsatisfiable core [2022-03-20 15:25:53,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:25:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 5425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:25:54,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:25:56,357 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 70 proven. 3045 refuted. 0 times theorem prover too weak. 2384 trivial. 0 not checked. [2022-03-20 15:25:56,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:25:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351792373] [2022-03-20 15:25:56,358 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:25:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429354235] [2022-03-20 15:25:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429354235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:25:56,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:25:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 76 [2022-03-20 15:25:56,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:25:56,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572217471] [2022-03-20 15:25:56,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572217471] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:25:56,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:25:56,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 15:25:56,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192608014] [2022-03-20 15:25:56,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:25:56,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 15:25:56,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:25:56,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 15:25:56,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2706, Invalid=2994, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 15:25:56,360 INFO L87 Difference]: Start difference. First operand 335 states and 371 transitions. Second operand has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 15:25:57,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:25:57,077 INFO L93 Difference]: Finished difference Result 349 states and 386 transitions. [2022-03-20 15:25:57,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 15:25:57,077 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) Word has length 338 [2022-03-20 15:25:57,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:25:57,079 INFO L225 Difference]: With dead ends: 349 [2022-03-20 15:25:57,079 INFO L226 Difference]: Without dead ends: 344 [2022-03-20 15:25:57,080 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 601 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5331, Invalid=6879, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 15:25:57,080 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 126 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:25:57,081 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 368 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:25:57,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-20 15:25:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-03-20 15:25:57,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 41 states have call successors, (41), 40 states have call predecessors, (41), 38 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-20 15:25:57,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 381 transitions. [2022-03-20 15:25:57,123 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 381 transitions. Word has length 338 [2022-03-20 15:25:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:25:57,123 INFO L478 AbstractCegarLoop]: Abstraction has 344 states and 381 transitions. [2022-03-20 15:25:57,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 6.589743589743589) internal successors, (257), 38 states have internal predecessors, (257), 38 states have call successors, (40), 38 states have call predecessors, (40), 36 states have return successors, (38), 36 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-20 15:25:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 381 transitions. [2022-03-20 15:25:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-03-20 15:25:57,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:25:57,125 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 36, 36, 36, 36, 36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:25:57,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 15:25:57,353 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 15:25:57,354 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:25:57,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:25:57,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 71 times [2022-03-20 15:25:57,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:25:57,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [759095643] [2022-03-20 15:25:57,355 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:25:57,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1597682838, now seen corresponding path program 72 times [2022-03-20 15:25:57,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:25:57,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270199774] [2022-03-20 15:25:57,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:25:57,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:25:57,364 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:25:57,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1409270699] [2022-03-20 15:25:57,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:25:57,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:25:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:25:57,365 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:25:57,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 15:25:59,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-20 15:25:59,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:25:59,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 77 conjunts are in the unsatisfiable core [2022-03-20 15:25:59,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 5742 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:00,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:02,263 INFO L134 CoverageAnalysis]: Checked inductivity of 5818 backedges. 72 proven. 3222 refuted. 0 times theorem prover too weak. 2524 trivial. 0 not checked. [2022-03-20 15:26:02,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270199774] [2022-03-20 15:26:02,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409270699] [2022-03-20 15:26:02,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409270699] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:02,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:02,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 78 [2022-03-20 15:26:02,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:02,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [759095643] [2022-03-20 15:26:02,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [759095643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:02,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:02,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 15:26:02,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406935773] [2022-03-20 15:26:02,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:02,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 15:26:02,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:02,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 15:26:02,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2855, Invalid=3151, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 15:26:02,268 INFO L87 Difference]: Start difference. First operand 344 states and 381 transitions. Second operand has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 15:26:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:02,983 INFO L93 Difference]: Finished difference Result 358 states and 396 transitions. [2022-03-20 15:26:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 15:26:02,983 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) Word has length 347 [2022-03-20 15:26:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:02,984 INFO L225 Difference]: With dead ends: 358 [2022-03-20 15:26:02,984 INFO L226 Difference]: Without dead ends: 353 [2022-03-20 15:26:02,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 729 GetRequests, 617 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5627, Invalid=7255, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 15:26:02,985 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 130 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 370 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:02,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 370 Invalid, 267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:02,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-03-20 15:26:03,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-03-20 15:26:03,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 271 states have (on average 1.1402214022140222) internal successors, (309), 271 states have internal predecessors, (309), 42 states have call successors, (42), 41 states have call predecessors, (42), 39 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-20 15:26:03,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 391 transitions. [2022-03-20 15:26:03,021 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 391 transitions. Word has length 347 [2022-03-20 15:26:03,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:03,022 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 391 transitions. [2022-03-20 15:26:03,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 6.6) internal successors, (264), 39 states have internal predecessors, (264), 39 states have call successors, (41), 39 states have call predecessors, (41), 37 states have return successors, (39), 37 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-20 15:26:03,022 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 391 transitions. [2022-03-20 15:26:03,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-03-20 15:26:03,023 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:03,024 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 37, 37, 37, 37, 37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:03,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:03,232 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 15:26:03,232 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:03,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:03,232 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 73 times [2022-03-20 15:26:03,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:03,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29362002] [2022-03-20 15:26:03,233 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash 2068976540, now seen corresponding path program 74 times [2022-03-20 15:26:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627128793] [2022-03-20 15:26:03,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:03,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:03,241 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:03,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1693753326] [2022-03-20 15:26:03,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:26:03,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:03,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:03,242 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:03,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 15:26:03,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:26:03,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:03,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 79 conjunts are in the unsatisfiable core [2022-03-20 15:26:03,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:04,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 6068 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:04,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6146 backedges. 74 proven. 3404 refuted. 0 times theorem prover too weak. 2668 trivial. 0 not checked. [2022-03-20 15:26:06,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627128793] [2022-03-20 15:26:06,190 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:06,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693753326] [2022-03-20 15:26:06,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693753326] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:06,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:06,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 80 [2022-03-20 15:26:06,191 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:06,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29362002] [2022-03-20 15:26:06,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29362002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:06,191 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:06,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 15:26:06,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924376478] [2022-03-20 15:26:06,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:06,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 15:26:06,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:06,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 15:26:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3008, Invalid=3312, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 15:26:06,198 INFO L87 Difference]: Start difference. First operand 353 states and 391 transitions. Second operand has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 15:26:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:07,013 INFO L93 Difference]: Finished difference Result 367 states and 406 transitions. [2022-03-20 15:26:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 15:26:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) Word has length 356 [2022-03-20 15:26:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:07,014 INFO L225 Difference]: With dead ends: 367 [2022-03-20 15:26:07,014 INFO L226 Difference]: Without dead ends: 362 [2022-03-20 15:26:07,016 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 748 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5931, Invalid=7641, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 15:26:07,016 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 150 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:07,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 378 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:07,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2022-03-20 15:26:07,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 362. [2022-03-20 15:26:07,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 278 states have (on average 1.1402877697841727) internal successors, (317), 278 states have internal predecessors, (317), 43 states have call successors, (43), 42 states have call predecessors, (43), 40 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-20 15:26:07,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 401 transitions. [2022-03-20 15:26:07,061 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 401 transitions. Word has length 356 [2022-03-20 15:26:07,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:07,061 INFO L478 AbstractCegarLoop]: Abstraction has 362 states and 401 transitions. [2022-03-20 15:26:07,062 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 6.609756097560975) internal successors, (271), 40 states have internal predecessors, (271), 40 states have call successors, (42), 40 states have call predecessors, (42), 38 states have return successors, (40), 38 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-20 15:26:07,062 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 401 transitions. [2022-03-20 15:26:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-03-20 15:26:07,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:07,063 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 38, 38, 38, 38, 38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:07,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-20 15:26:07,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:07,287 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:07,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 75 times [2022-03-20 15:26:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:07,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1101232944] [2022-03-20 15:26:07,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash 63847254, now seen corresponding path program 76 times [2022-03-20 15:26:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:07,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713284105] [2022-03-20 15:26:07,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:07,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:07,296 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:07,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1827478219] [2022-03-20 15:26:07,296 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:26:07,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:07,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:07,297 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:07,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 15:26:07,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:26:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:07,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 853 conjuncts, 81 conjunts are in the unsatisfiable core [2022-03-20 15:26:07,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:08,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 6403 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:08,693 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 6483 backedges. 76 proven. 3591 refuted. 0 times theorem prover too weak. 2816 trivial. 0 not checked. [2022-03-20 15:26:10,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713284105] [2022-03-20 15:26:10,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:10,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827478219] [2022-03-20 15:26:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827478219] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:10,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:10,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 82 [2022-03-20 15:26:10,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:10,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1101232944] [2022-03-20 15:26:10,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1101232944] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:10,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:10,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 15:26:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569997607] [2022-03-20 15:26:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:10,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 15:26:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 15:26:10,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3165, Invalid=3477, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 15:26:10,553 INFO L87 Difference]: Start difference. First operand 362 states and 401 transitions. Second operand has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 15:26:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:11,411 INFO L93 Difference]: Finished difference Result 376 states and 416 transitions. [2022-03-20 15:26:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 15:26:11,412 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) Word has length 365 [2022-03-20 15:26:11,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:11,413 INFO L225 Difference]: With dead ends: 376 [2022-03-20 15:26:11,413 INFO L226 Difference]: Without dead ends: 371 [2022-03-20 15:26:11,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 767 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=6243, Invalid=8037, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 15:26:11,415 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 175 mSDsluCounter, 304 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:11,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 368 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 371 states. [2022-03-20 15:26:11,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 371 to 371. [2022-03-20 15:26:11,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 285 states have (on average 1.1403508771929824) internal successors, (325), 285 states have internal predecessors, (325), 44 states have call successors, (44), 43 states have call predecessors, (44), 41 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 15:26:11,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 411 transitions. [2022-03-20 15:26:11,461 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 411 transitions. Word has length 365 [2022-03-20 15:26:11,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:11,462 INFO L478 AbstractCegarLoop]: Abstraction has 371 states and 411 transitions. [2022-03-20 15:26:11,462 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 6.619047619047619) internal successors, (278), 41 states have internal predecessors, (278), 41 states have call successors, (43), 41 states have call predecessors, (43), 39 states have return successors, (41), 39 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-20 15:26:11,462 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 411 transitions. [2022-03-20 15:26:11,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 375 [2022-03-20 15:26:11,463 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:11,464 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 39, 39, 39, 39, 39, 39, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:11,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:11,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:11,671 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:11,671 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 77 times [2022-03-20 15:26:11,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:11,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60730470] [2022-03-20 15:26:11,672 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash -194370340, now seen corresponding path program 78 times [2022-03-20 15:26:11,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274891865] [2022-03-20 15:26:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:11,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:11,680 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:11,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [621016739] [2022-03-20 15:26:11,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:26:11,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:11,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:11,681 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:11,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 15:26:15,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2022-03-20 15:26:15,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:15,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 873 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-20 15:26:15,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 6747 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:16,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6829 backedges. 78 proven. 3783 refuted. 0 times theorem prover too weak. 2968 trivial. 0 not checked. [2022-03-20 15:26:18,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274891865] [2022-03-20 15:26:18,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:18,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621016739] [2022-03-20 15:26:18,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621016739] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:18,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 84 [2022-03-20 15:26:18,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60730470] [2022-03-20 15:26:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60730470] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:18,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 15:26:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862177708] [2022-03-20 15:26:18,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:18,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 15:26:18,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:18,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 15:26:18,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3326, Invalid=3646, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 15:26:18,502 INFO L87 Difference]: Start difference. First operand 371 states and 411 transitions. Second operand has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 15:26:19,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:19,361 INFO L93 Difference]: Finished difference Result 385 states and 426 transitions. [2022-03-20 15:26:19,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 15:26:19,361 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) Word has length 374 [2022-03-20 15:26:19,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:19,363 INFO L225 Difference]: With dead ends: 385 [2022-03-20 15:26:19,363 INFO L226 Difference]: Without dead ends: 380 [2022-03-20 15:26:19,364 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 665 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=6563, Invalid=8443, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 15:26:19,364 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 114 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:19,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 424 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:19,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-20 15:26:19,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-03-20 15:26:19,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 292 states have (on average 1.1404109589041096) internal successors, (333), 292 states have internal predecessors, (333), 45 states have call successors, (45), 44 states have call predecessors, (45), 42 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-20 15:26:19,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 421 transitions. [2022-03-20 15:26:19,411 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 421 transitions. Word has length 374 [2022-03-20 15:26:19,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:19,411 INFO L478 AbstractCegarLoop]: Abstraction has 380 states and 421 transitions. [2022-03-20 15:26:19,412 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 6.627906976744186) internal successors, (285), 42 states have internal predecessors, (285), 42 states have call successors, (44), 42 states have call predecessors, (44), 40 states have return successors, (42), 40 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-20 15:26:19,412 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 421 transitions. [2022-03-20 15:26:19,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2022-03-20 15:26:19,414 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:19,414 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 40, 40, 40, 40, 40, 40, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:19,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:19,622 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 15:26:19,622 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:19,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 79 times [2022-03-20 15:26:19,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:19,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115537773] [2022-03-20 15:26:19,623 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash 949326358, now seen corresponding path program 80 times [2022-03-20 15:26:19,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731899479] [2022-03-20 15:26:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:19,635 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:19,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1915145373] [2022-03-20 15:26:19,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:26:19,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:19,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:19,637 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:19,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 15:26:19,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:26:19,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 893 conjuncts, 85 conjunts are in the unsatisfiable core [2022-03-20 15:26:19,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:21,039 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 7100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:21,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 7184 backedges. 80 proven. 3980 refuted. 0 times theorem prover too weak. 3124 trivial. 0 not checked. [2022-03-20 15:26:23,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731899479] [2022-03-20 15:26:23,053 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:23,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915145373] [2022-03-20 15:26:23,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915145373] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:23,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:23,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 86 [2022-03-20 15:26:23,054 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115537773] [2022-03-20 15:26:23,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115537773] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:23,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:23,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 15:26:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757227675] [2022-03-20 15:26:23,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:23,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 15:26:23,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 15:26:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3491, Invalid=3819, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 15:26:23,056 INFO L87 Difference]: Start difference. First operand 380 states and 421 transitions. Second operand has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 15:26:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:23,918 INFO L93 Difference]: Finished difference Result 394 states and 436 transitions. [2022-03-20 15:26:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 15:26:23,918 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) Word has length 383 [2022-03-20 15:26:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:23,920 INFO L225 Difference]: With dead ends: 394 [2022-03-20 15:26:23,920 INFO L226 Difference]: Without dead ends: 389 [2022-03-20 15:26:23,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 681 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 901 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=6891, Invalid=8859, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 15:26:23,921 INFO L913 BasicCegarLoop]: 66 mSDtfsCounter, 140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:23,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 408 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-20 15:26:23,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 389. [2022-03-20 15:26:23,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 299 states have (on average 1.140468227424749) internal successors, (341), 299 states have internal predecessors, (341), 46 states have call successors, (46), 45 states have call predecessors, (46), 43 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-20 15:26:23,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 431 transitions. [2022-03-20 15:26:23,975 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 431 transitions. Word has length 383 [2022-03-20 15:26:23,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:23,976 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 431 transitions. [2022-03-20 15:26:23,976 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 6.636363636363637) internal successors, (292), 43 states have internal predecessors, (292), 43 states have call successors, (45), 43 states have call predecessors, (45), 41 states have return successors, (43), 41 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-20 15:26:23,976 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 431 transitions. [2022-03-20 15:26:23,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2022-03-20 15:26:23,978 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:23,978 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 41, 41, 41, 41, 41, 41, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:24,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:24,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:24,191 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:24,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 81 times [2022-03-20 15:26:24,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:24,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657266319] [2022-03-20 15:26:24,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:24,192 INFO L85 PathProgramCache]: Analyzing trace with hash 311977500, now seen corresponding path program 82 times [2022-03-20 15:26:24,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:24,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645966014] [2022-03-20 15:26:24,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:24,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:24,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:24,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312292552] [2022-03-20 15:26:24,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:26:24,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:24,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:24,203 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:24,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 15:26:24,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:26:24,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:24,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 87 conjunts are in the unsatisfiable core [2022-03-20 15:26:24,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:25,641 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 7462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:25,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:27,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7548 backedges. 82 proven. 4182 refuted. 0 times theorem prover too weak. 3284 trivial. 0 not checked. [2022-03-20 15:26:27,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645966014] [2022-03-20 15:26:27,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312292552] [2022-03-20 15:26:27,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312292552] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:27,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:27,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 88 [2022-03-20 15:26:27,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657266319] [2022-03-20 15:26:27,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657266319] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:27,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:27,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 15:26:27,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106343177] [2022-03-20 15:26:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:27,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 15:26:27,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 15:26:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3660, Invalid=3996, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 15:26:27,733 INFO L87 Difference]: Start difference. First operand 389 states and 431 transitions. Second operand has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-20 15:26:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:28,638 INFO L93 Difference]: Finished difference Result 403 states and 446 transitions. [2022-03-20 15:26:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 15:26:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) Word has length 392 [2022-03-20 15:26:28,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:28,640 INFO L225 Difference]: With dead ends: 403 [2022-03-20 15:26:28,640 INFO L226 Difference]: Without dead ends: 398 [2022-03-20 15:26:28,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 824 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7227, Invalid=9285, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 15:26:28,642 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 185 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 404 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:28,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 404 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:28,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2022-03-20 15:26:28,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 398. [2022-03-20 15:26:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 306 states have (on average 1.1405228758169934) internal successors, (349), 306 states have internal predecessors, (349), 47 states have call successors, (47), 46 states have call predecessors, (47), 44 states have return successors, (45), 45 states have call predecessors, (45), 45 states have call successors, (45) [2022-03-20 15:26:28,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 441 transitions. [2022-03-20 15:26:28,692 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 441 transitions. Word has length 392 [2022-03-20 15:26:28,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:28,693 INFO L478 AbstractCegarLoop]: Abstraction has 398 states and 441 transitions. [2022-03-20 15:26:28,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 6.644444444444445) internal successors, (299), 44 states have internal predecessors, (299), 44 states have call successors, (46), 44 states have call predecessors, (46), 42 states have return successors, (44), 42 states have call predecessors, (44), 43 states have call successors, (44) [2022-03-20 15:26:28,693 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 441 transitions. [2022-03-20 15:26:28,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2022-03-20 15:26:28,695 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:28,695 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 42, 42, 42, 42, 42, 42, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:28,703 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:28,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-20 15:26:28,903 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:28,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 83 times [2022-03-20 15:26:28,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:28,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623408259] [2022-03-20 15:26:28,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:28,904 INFO L85 PathProgramCache]: Analyzing trace with hash -432228138, now seen corresponding path program 84 times [2022-03-20 15:26:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:28,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237740340] [2022-03-20 15:26:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:28,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:28,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728962835] [2022-03-20 15:26:28,915 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:26:28,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:28,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:28,916 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:28,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 15:26:36,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2022-03-20 15:26:36,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:36,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 933 conjuncts, 89 conjunts are in the unsatisfiable core [2022-03-20 15:26:36,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 7833 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:37,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:39,446 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 84 proven. 4389 refuted. 0 times theorem prover too weak. 3448 trivial. 0 not checked. [2022-03-20 15:26:39,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237740340] [2022-03-20 15:26:39,447 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:39,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728962835] [2022-03-20 15:26:39,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728962835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:39,447 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:39,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 90 [2022-03-20 15:26:39,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623408259] [2022-03-20 15:26:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623408259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:39,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:39,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 15:26:39,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775232123] [2022-03-20 15:26:39,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:39,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 15:26:39,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 15:26:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3833, Invalid=4177, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 15:26:39,450 INFO L87 Difference]: Start difference. First operand 398 states and 441 transitions. Second operand has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-20 15:26:40,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:40,394 INFO L93 Difference]: Finished difference Result 412 states and 456 transitions. [2022-03-20 15:26:40,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 15:26:40,394 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) Word has length 401 [2022-03-20 15:26:40,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:40,395 INFO L225 Difference]: With dead ends: 412 [2022-03-20 15:26:40,396 INFO L226 Difference]: Without dead ends: 407 [2022-03-20 15:26:40,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 843 GetRequests, 713 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7571, Invalid=9721, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 15:26:40,397 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 183 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:40,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 418 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:40,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2022-03-20 15:26:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 407. [2022-03-20 15:26:40,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 313 states have (on average 1.1405750798722045) internal successors, (357), 313 states have internal predecessors, (357), 48 states have call successors, (48), 47 states have call predecessors, (48), 45 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 15:26:40,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 451 transitions. [2022-03-20 15:26:40,430 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 451 transitions. Word has length 401 [2022-03-20 15:26:40,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:40,430 INFO L478 AbstractCegarLoop]: Abstraction has 407 states and 451 transitions. [2022-03-20 15:26:40,431 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 6.6521739130434785) internal successors, (306), 45 states have internal predecessors, (306), 45 states have call successors, (47), 45 states have call predecessors, (47), 43 states have return successors, (45), 43 states have call predecessors, (45), 44 states have call successors, (45) [2022-03-20 15:26:40,431 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 451 transitions. [2022-03-20 15:26:40,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2022-03-20 15:26:40,433 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:40,433 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 43, 43, 43, 43, 43, 43, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:40,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-20 15:26:40,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:40,639 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:40,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 85 times [2022-03-20 15:26:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:40,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910431876] [2022-03-20 15:26:40,640 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:40,640 INFO L85 PathProgramCache]: Analyzing trace with hash -290400420, now seen corresponding path program 86 times [2022-03-20 15:26:40,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:40,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348376868] [2022-03-20 15:26:40,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:40,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:40,648 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:40,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690013659] [2022-03-20 15:26:40,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:26:40,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:40,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:40,650 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:40,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 15:26:40,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:26:40,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:40,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 953 conjuncts, 91 conjunts are in the unsatisfiable core [2022-03-20 15:26:40,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:42,008 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 8213 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:42,009 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8303 backedges. 86 proven. 4601 refuted. 0 times theorem prover too weak. 3616 trivial. 0 not checked. [2022-03-20 15:26:44,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348376868] [2022-03-20 15:26:44,310 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:44,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690013659] [2022-03-20 15:26:44,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690013659] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:44,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 92 [2022-03-20 15:26:44,311 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:44,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910431876] [2022-03-20 15:26:44,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910431876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:44,311 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:44,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 15:26:44,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207105815] [2022-03-20 15:26:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:44,311 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 15:26:44,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 15:26:44,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4010, Invalid=4362, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 15:26:44,312 INFO L87 Difference]: Start difference. First operand 407 states and 451 transitions. Second operand has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-20 15:26:45,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:45,299 INFO L93 Difference]: Finished difference Result 421 states and 466 transitions. [2022-03-20 15:26:45,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 15:26:45,300 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) Word has length 410 [2022-03-20 15:26:45,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:45,301 INFO L225 Difference]: With dead ends: 421 [2022-03-20 15:26:45,301 INFO L226 Difference]: Without dead ends: 416 [2022-03-20 15:26:45,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 862 GetRequests, 729 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=7923, Invalid=10167, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 15:26:45,302 INFO L913 BasicCegarLoop]: 69 mSDtfsCounter, 149 mSDsluCounter, 363 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:45,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 432 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:45,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-03-20 15:26:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-03-20 15:26:45,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 320 states have (on average 1.140625) internal successors, (365), 320 states have internal predecessors, (365), 49 states have call successors, (49), 48 states have call predecessors, (49), 46 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-20 15:26:45,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 461 transitions. [2022-03-20 15:26:45,354 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 461 transitions. Word has length 410 [2022-03-20 15:26:45,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:45,355 INFO L478 AbstractCegarLoop]: Abstraction has 416 states and 461 transitions. [2022-03-20 15:26:45,355 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 6.659574468085107) internal successors, (313), 46 states have internal predecessors, (313), 46 states have call successors, (48), 46 states have call predecessors, (48), 44 states have return successors, (46), 44 states have call predecessors, (46), 45 states have call successors, (46) [2022-03-20 15:26:45,355 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 461 transitions. [2022-03-20 15:26:45,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-03-20 15:26:45,357 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:45,357 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 44, 44, 44, 44, 44, 44, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:45,382 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:45,582 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:45,582 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:45,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 87 times [2022-03-20 15:26:45,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:45,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2108258077] [2022-03-20 15:26:45,583 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1569738858, now seen corresponding path program 88 times [2022-03-20 15:26:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:45,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519757198] [2022-03-20 15:26:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:45,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:45,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:45,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1811621163] [2022-03-20 15:26:45,592 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:26:45,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:45,594 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:45,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 15:26:45,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:26:45,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:26:45,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 93 conjunts are in the unsatisfiable core [2022-03-20 15:26:45,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:26:47,125 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 8602 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:26:47,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:26:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 8694 backedges. 88 proven. 4818 refuted. 0 times theorem prover too weak. 3788 trivial. 0 not checked. [2022-03-20 15:26:49,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:26:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519757198] [2022-03-20 15:26:49,536 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:26:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811621163] [2022-03-20 15:26:49,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811621163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:26:49,536 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:26:49,536 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 94 [2022-03-20 15:26:49,536 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:26:49,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2108258077] [2022-03-20 15:26:49,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2108258077] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:26:49,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:26:49,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 15:26:49,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354688625] [2022-03-20 15:26:49,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:26:49,537 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 15:26:49,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:49,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 15:26:49,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4191, Invalid=4551, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 15:26:49,538 INFO L87 Difference]: Start difference. First operand 416 states and 461 transitions. Second operand has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-20 15:26:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:26:50,547 INFO L93 Difference]: Finished difference Result 430 states and 476 transitions. [2022-03-20 15:26:50,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 15:26:50,547 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) Word has length 419 [2022-03-20 15:26:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:26:50,549 INFO L225 Difference]: With dead ends: 430 [2022-03-20 15:26:50,549 INFO L226 Difference]: Without dead ends: 425 [2022-03-20 15:26:50,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 881 GetRequests, 745 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=8283, Invalid=10623, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 15:26:50,551 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 226 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:26:50,551 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 422 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:26:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-03-20 15:26:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 425. [2022-03-20 15:26:50,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 327 states have (on average 1.1406727828746177) internal successors, (373), 327 states have internal predecessors, (373), 50 states have call successors, (50), 49 states have call predecessors, (50), 47 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2022-03-20 15:26:50,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 471 transitions. [2022-03-20 15:26:50,585 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 471 transitions. Word has length 419 [2022-03-20 15:26:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:26:50,586 INFO L478 AbstractCegarLoop]: Abstraction has 425 states and 471 transitions. [2022-03-20 15:26:50,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.666666666666667) internal successors, (320), 47 states have internal predecessors, (320), 47 states have call successors, (49), 47 states have call predecessors, (49), 45 states have return successors, (47), 45 states have call predecessors, (47), 46 states have call successors, (47) [2022-03-20 15:26:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 471 transitions. [2022-03-20 15:26:50,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 429 [2022-03-20 15:26:50,588 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:26:50,588 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 45, 45, 45, 45, 45, 45, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:26:50,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-03-20 15:26:50,796 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 15:26:50,796 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:26:50,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:26:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 89 times [2022-03-20 15:26:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:26:50,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656532333] [2022-03-20 15:26:50,797 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:26:50,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1803061092, now seen corresponding path program 90 times [2022-03-20 15:26:50,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:26:50,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056730464] [2022-03-20 15:26:50,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:26:50,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:26:50,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:26:50,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [315869882] [2022-03-20 15:26:50,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:26:50,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:26:50,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:26:50,810 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:26:50,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 15:28:00,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2022-03-20 15:28:00,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:28:00,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 993 conjuncts, 95 conjunts are in the unsatisfiable core [2022-03-20 15:28:00,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:28:01,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 9000 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:28:01,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:28:04,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9094 backedges. 90 proven. 5040 refuted. 0 times theorem prover too weak. 3964 trivial. 0 not checked. [2022-03-20 15:28:04,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:28:04,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056730464] [2022-03-20 15:28:04,114 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:28:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315869882] [2022-03-20 15:28:04,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315869882] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:28:04,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:28:04,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 96 [2022-03-20 15:28:04,114 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:28:04,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656532333] [2022-03-20 15:28:04,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656532333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:28:04,114 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:28:04,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 15:28:04,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100423899] [2022-03-20 15:28:04,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:28:04,115 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 15:28:04,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:04,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 15:28:04,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4376, Invalid=4744, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 15:28:04,116 INFO L87 Difference]: Start difference. First operand 425 states and 471 transitions. Second operand has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 15:28:05,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:28:05,139 INFO L93 Difference]: Finished difference Result 439 states and 486 transitions. [2022-03-20 15:28:05,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 15:28:05,139 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 428 [2022-03-20 15:28:05,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:28:05,141 INFO L225 Difference]: With dead ends: 439 [2022-03-20 15:28:05,141 INFO L226 Difference]: Without dead ends: 434 [2022-03-20 15:28:05,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 900 GetRequests, 761 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8651, Invalid=11089, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 15:28:05,143 INFO L913 BasicCegarLoop]: 71 mSDtfsCounter, 244 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:28:05,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 448 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:28:05,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-20 15:28:05,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-20 15:28:05,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-20 15:28:05,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-20 15:28:05,203 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 428 [2022-03-20 15:28:05,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:28:05,203 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-20 15:28:05,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 6.673469387755102) internal successors, (327), 48 states have internal predecessors, (327), 48 states have call successors, (50), 48 states have call predecessors, (50), 46 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-03-20 15:28:05,203 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-20 15:28:05,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-20 15:28:05,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:28:05,206 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:28:05,230 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 15:28:05,427 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-20 15:28:05,427 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:28:05,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:28:05,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 91 times [2022-03-20 15:28:05,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:05,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1810114257] [2022-03-20 15:28:05,428 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:28:05,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 92 times [2022-03-20 15:28:05,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:28:05,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963210816] [2022-03-20 15:28:05,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:28:05,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:28:05,437 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:28:05,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299566963] [2022-03-20 15:28:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 15:28:05,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:28:05,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:28:05,438 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:28:05,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 15:28:05,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 15:28:05,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:28:05,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-20 15:28:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:28:06,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:28:06,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:28:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-20 15:28:09,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:28:09,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963210816] [2022-03-20 15:28:09,419 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:28:09,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299566963] [2022-03-20 15:28:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299566963] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:28:09,420 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:28:09,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-20 15:28:09,420 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:28:09,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1810114257] [2022-03-20 15:28:09,420 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1810114257] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:28:09,420 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:28:09,420 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 15:28:09,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314295960] [2022-03-20 15:28:09,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:28:09,421 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 15:28:09,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:09,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 15:28:09,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 15:28:09,422 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-20 15:28:10,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:28:10,582 INFO L93 Difference]: Finished difference Result 448 states and 496 transitions. [2022-03-20 15:28:10,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 15:28:10,582 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) Word has length 437 [2022-03-20 15:28:10,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:28:10,584 INFO L225 Difference]: With dead ends: 448 [2022-03-20 15:28:10,584 INFO L226 Difference]: Without dead ends: 443 [2022-03-20 15:28:10,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 919 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9027, Invalid=11565, Unknown=0, NotChecked=0, Total=20592 [2022-03-20 15:28:10,586 INFO L913 BasicCegarLoop]: 72 mSDtfsCounter, 161 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:28:10,586 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 462 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:28:10,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-03-20 15:28:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 443. [2022-03-20 15:28:10,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 341 states have (on average 1.1407624633431086) internal successors, (389), 341 states have internal predecessors, (389), 52 states have call successors, (52), 51 states have call predecessors, (52), 49 states have return successors, (50), 50 states have call predecessors, (50), 50 states have call successors, (50) [2022-03-20 15:28:10,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 491 transitions. [2022-03-20 15:28:10,643 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 491 transitions. Word has length 437 [2022-03-20 15:28:10,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:28:10,644 INFO L478 AbstractCegarLoop]: Abstraction has 443 states and 491 transitions. [2022-03-20 15:28:10,644 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 6.68) internal successors, (334), 49 states have internal predecessors, (334), 49 states have call successors, (51), 49 states have call predecessors, (51), 47 states have return successors, (49), 47 states have call predecessors, (49), 48 states have call successors, (49) [2022-03-20 15:28:10,644 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 491 transitions. [2022-03-20 15:28:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 447 [2022-03-20 15:28:10,647 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:28:10,647 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 47, 47, 47, 47, 47, 47, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:28:10,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 15:28:10,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 15:28:10,861 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:28:10,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:28:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 93 times [2022-03-20 15:28:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:10,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [377994328] [2022-03-20 15:28:10,861 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:28:10,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1123043804, now seen corresponding path program 94 times [2022-03-20 15:28:10,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:28:10,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883564477] [2022-03-20 15:28:10,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:28:10,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:28:10,874 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:28:10,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [938692162] [2022-03-20 15:28:10,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 15:28:10,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:28:10,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:28:10,875 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:28:10,876 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 15:28:11,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 15:28:11,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 15:28:11,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1033 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 15:28:11,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 15:28:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 9823 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 15:28:12,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 15:28:14,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9921 backedges. 94 proven. 5499 refuted. 0 times theorem prover too weak. 4328 trivial. 0 not checked. [2022-03-20 15:28:14,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 15:28:14,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883564477] [2022-03-20 15:28:14,978 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 15:28:14,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938692162] [2022-03-20 15:28:14,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938692162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 15:28:14,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 15:28:14,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 100 [2022-03-20 15:28:14,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 15:28:14,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [377994328] [2022-03-20 15:28:14,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [377994328] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 15:28:14,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 15:28:14,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 15:28:14,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104890999] [2022-03-20 15:28:14,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 15:28:14,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 15:28:14,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:14,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 15:28:14,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4758, Invalid=5142, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 15:28:14,981 INFO L87 Difference]: Start difference. First operand 443 states and 491 transitions. Second operand has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-20 15:28:16,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 15:28:16,112 INFO L93 Difference]: Finished difference Result 457 states and 506 transitions. [2022-03-20 15:28:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 15:28:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) Word has length 446 [2022-03-20 15:28:16,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 15:28:16,115 INFO L225 Difference]: With dead ends: 457 [2022-03-20 15:28:16,115 INFO L226 Difference]: Without dead ends: 452 [2022-03-20 15:28:16,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 793 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=9411, Invalid=12051, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 15:28:16,116 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 164 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 15:28:16,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 482 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 15:28:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-03-20 15:28:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 452. [2022-03-20 15:28:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 452 states, 348 states have (on average 1.1408045977011494) internal successors, (397), 348 states have internal predecessors, (397), 53 states have call successors, (53), 52 states have call predecessors, (53), 50 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 15:28:16,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 452 states to 452 states and 501 transitions. [2022-03-20 15:28:16,160 INFO L78 Accepts]: Start accepts. Automaton has 452 states and 501 transitions. Word has length 446 [2022-03-20 15:28:16,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 15:28:16,161 INFO L478 AbstractCegarLoop]: Abstraction has 452 states and 501 transitions. [2022-03-20 15:28:16,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.686274509803922) internal successors, (341), 50 states have internal predecessors, (341), 50 states have call successors, (52), 50 states have call predecessors, (52), 48 states have return successors, (50), 48 states have call predecessors, (50), 49 states have call successors, (50) [2022-03-20 15:28:16,161 INFO L276 IsEmpty]: Start isEmpty. Operand 452 states and 501 transitions. [2022-03-20 15:28:16,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2022-03-20 15:28:16,163 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 15:28:16,163 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 48, 48, 48, 48, 48, 48, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 15:28:16,171 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-20 15:28:16,370 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:28:16,370 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 15:28:16,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 15:28:16,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 95 times [2022-03-20 15:28:16,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 15:28:16,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067721350] [2022-03-20 15:28:16,371 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 15:28:16,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2116619542, now seen corresponding path program 96 times [2022-03-20 15:28:16,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 15:28:16,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817513325] [2022-03-20 15:28:16,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 15:28:16,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 15:28:16,381 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 15:28:16,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1841743941] [2022-03-20 15:28:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-20 15:28:16,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 15:28:16,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 15:28:16,382 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 15:28:16,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process