/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 16:36:27,478 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 16:36:27,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 16:36:27,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 16:36:27,529 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 16:36:27,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 16:36:27,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 16:36:27,530 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 16:36:27,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 16:36:27,531 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 16:36:27,532 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 16:36:27,533 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 16:36:27,534 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 16:36:27,536 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 16:36:27,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 16:36:27,537 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 16:36:27,537 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 16:36:27,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 16:36:27,543 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 16:36:27,544 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 16:36:27,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 16:36:27,545 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 16:36:27,550 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 16:36:27,550 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 16:36:27,551 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 16:36:27,551 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 16:36:27,551 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 16:36:27,551 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 16:36:27,551 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 16:36:27,551 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 16:36:27,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 16:36:27,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:36:27,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 16:36:27,553 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 16:36:27,554 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 16:36:27,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 16:36:27,701 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 16:36:27,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 16:36:27,703 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 16:36:27,704 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 16:36:27,705 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-04-06 16:36:27,746 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7aa31d17/7dedbbce741d4030b78437613c4f1be8/FLAG386d7f431 [2022-04-06 16:36:28,124 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 16:36:28,125 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c [2022-04-06 16:36:28,132 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7aa31d17/7dedbbce741d4030b78437613c4f1be8/FLAG386d7f431 [2022-04-06 16:36:28,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7aa31d17/7dedbbce741d4030b78437613c4f1be8 [2022-04-06 16:36:28,144 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 16:36:28,146 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 16:36:28,148 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 16:36:28,148 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 16:36:28,151 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 16:36:28,151 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14aef147 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28, skipping insertion in model container [2022-04-06 16:36:28,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,156 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 16:36:28,166 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 16:36:28,306 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-04-06 16:36:28,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:36:28,338 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 16:36:28,346 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound5.c[490,503] [2022-04-06 16:36:28,364 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 16:36:28,373 INFO L208 MainTranslator]: Completed translation [2022-04-06 16:36:28,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28 WrapperNode [2022-04-06 16:36:28,373 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 16:36:28,374 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 16:36:28,374 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 16:36:28,374 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 16:36:28,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,403 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,405 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 16:36:28,410 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 16:36:28,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 16:36:28,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 16:36:28,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (1/1) ... [2022-04-06 16:36:28,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 16:36:28,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:28,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 16:36:28,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 16:36:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 16:36:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 16:36:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 16:36:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 16:36:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 16:36:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 16:36:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 16:36:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 16:36:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 16:36:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 16:36:28,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 16:36:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 16:36:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 16:36:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 16:36:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 16:36:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 16:36:28,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 16:36:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 16:36:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 16:36:28,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 16:36:28,503 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 16:36:28,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 16:36:28,651 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 16:36:28,654 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 16:36:28,654 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 16:36:28,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:36:28 BoogieIcfgContainer [2022-04-06 16:36:28,656 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 16:36:28,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 16:36:28,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 16:36:28,659 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 16:36:28,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 04:36:28" (1/3) ... [2022-04-06 16:36:28,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce617fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:36:28, skipping insertion in model container [2022-04-06 16:36:28,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 04:36:28" (2/3) ... [2022-04-06 16:36:28,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ce617fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 04:36:28, skipping insertion in model container [2022-04-06 16:36:28,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 04:36:28" (3/3) ... [2022-04-06 16:36:28,660 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2022-04-06 16:36:28,663 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 16:36:28,663 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 16:36:28,694 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 16:36:28,700 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 16:36:28,701 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 16:36:28,711 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 16:36:28,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 16:36:28,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:28,718 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:28,718 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:28,721 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-04-06 16:36:28,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:28,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656006107] [2022-04-06 16:36:28,732 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:28,732 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 2 times [2022-04-06 16:36:28,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:28,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596466655] [2022-04-06 16:36:28,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:28,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:28,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 16:36:28,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 16:36:28,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 16:36:28,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 16:36:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 16:36:28,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 16:36:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 16:36:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 16:36:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:36:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:28,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596466655] [2022-04-06 16:36:28,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596466655] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:28,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:28,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:36:28,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:28,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656006107] [2022-04-06 16:36:28,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656006107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:28,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:28,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 16:36:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466989838] [2022-04-06 16:36:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:28,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 16:36:28,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:28,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 16:36:28,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:36:28,957 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:36:29,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:29,044 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-04-06 16:36:29,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 16:36:29,046 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-04-06 16:36:29,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:29,051 INFO L225 Difference]: With dead ends: 73 [2022-04-06 16:36:29,051 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 16:36:29,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 16:36:29,059 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:29,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:36:29,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 16:36:29,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 16:36:29,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 16:36:29,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-04-06 16:36:29,092 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-04-06 16:36:29,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:29,092 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-04-06 16:36:29,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:36:29,093 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-04-06 16:36:29,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 16:36:29,095 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:29,096 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:29,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 16:36:29,097 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:29,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:29,097 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-04-06 16:36:29,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:29,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988613245] [2022-04-06 16:36:29,098 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:29,098 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 2 times [2022-04-06 16:36:29,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:29,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118069823] [2022-04-06 16:36:29,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:29,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:29,112 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:29,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66754051] [2022-04-06 16:36:29,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:29,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:29,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:29,122 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:29,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 16:36:29,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:29,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:29,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:36:29,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:29,356 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 16:36:29,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:29,497 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-04-06 16:36:29,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:29,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118069823] [2022-04-06 16:36:29,497 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:29,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66754051] [2022-04-06 16:36:29,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66754051] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:36:29,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:36:29,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 16:36:29,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:29,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988613245] [2022-04-06 16:36:29,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988613245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:29,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:29,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 16:36:29,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785129054] [2022-04-06 16:36:29,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:29,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 16:36:29,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:29,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 16:36:29,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:36:29,501 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:36:29,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:29,602 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-04-06 16:36:29,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:36:29,603 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-06 16:36:29,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:29,604 INFO L225 Difference]: With dead ends: 52 [2022-04-06 16:36:29,604 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 16:36:29,604 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:36:29,605 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:29,605 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 128 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:36:29,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 16:36:29,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-04-06 16:36:29,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 16:36:29,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-04-06 16:36:29,613 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-04-06 16:36:29,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:29,613 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-04-06 16:36:29,613 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 16:36:29,613 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-04-06 16:36:29,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 16:36:29,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:29,614 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:29,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 16:36:29,832 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:29,833 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:29,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:29,833 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-04-06 16:36:29,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:29,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [732967814] [2022-04-06 16:36:29,834 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:29,834 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 2 times [2022-04-06 16:36:29,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:29,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612059661] [2022-04-06 16:36:29,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:29,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:29,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:29,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577101093] [2022-04-06 16:36:29,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:29,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:29,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:29,858 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:29,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 16:36:29,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 16:36:29,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:29,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 16:36:29,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:36:30,043 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:36:30,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:30,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612059661] [2022-04-06 16:36:30,043 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577101093] [2022-04-06 16:36:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577101093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:30,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:30,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:30,044 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:30,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [732967814] [2022-04-06 16:36:30,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [732967814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:30,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:30,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:30,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864939260] [2022-04-06 16:36:30,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:30,045 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:36:30,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:30,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:36:30,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:36:30,046 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 16:36:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:30,080 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-04-06 16:36:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:36:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-04-06 16:36:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:30,081 INFO L225 Difference]: With dead ends: 50 [2022-04-06 16:36:30,081 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 16:36:30,082 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:36:30,082 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:30,083 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 154 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:36:30,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 16:36:30,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 43. [2022-04-06 16:36:30,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 16:36:30,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2022-04-06 16:36:30,090 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2022-04-06 16:36:30,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:30,091 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2022-04-06 16:36:30,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-04-06 16:36:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2022-04-06 16:36:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 16:36:30,092 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:30,092 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:30,114 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:30,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 16:36:30,304 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:30,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:30,304 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-04-06 16:36:30,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:30,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [187691396] [2022-04-06 16:36:30,305 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:30,305 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 2 times [2022-04-06 16:36:30,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:30,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304618428] [2022-04-06 16:36:30,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:30,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:30,315 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:30,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2072548089] [2022-04-06 16:36:30,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:30,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:30,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:30,316 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:30,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 16:36:30,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:30,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:30,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:36:30,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 16:36:30,476 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:36:30,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304618428] [2022-04-06 16:36:30,477 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072548089] [2022-04-06 16:36:30,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072548089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:30,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:30,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:30,477 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:30,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [187691396] [2022-04-06 16:36:30,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [187691396] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:30,478 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:30,478 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:30,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963751104] [2022-04-06 16:36:30,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:30,478 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:36:30,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:30,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:36:30,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:36:30,479 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:36:30,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:30,510 INFO L93 Difference]: Finished difference Result 58 states and 74 transitions. [2022-04-06 16:36:30,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:36:30,510 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-04-06 16:36:30,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:30,512 INFO L225 Difference]: With dead ends: 58 [2022-04-06 16:36:30,512 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 16:36:30,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:36:30,513 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 7 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:30,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 161 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:36:30,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 16:36:30,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 16:36:30,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 32 states have internal predecessors, (33), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 16:36:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 71 transitions. [2022-04-06 16:36:30,522 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 71 transitions. Word has length 50 [2022-04-06 16:36:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:30,522 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 71 transitions. [2022-04-06 16:36:30,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 16:36:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 71 transitions. [2022-04-06 16:36:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 16:36:30,523 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:30,523 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:30,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:30,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:30,740 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:30,740 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-04-06 16:36:30,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:30,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1017060854] [2022-04-06 16:36:30,741 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 2 times [2022-04-06 16:36:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:30,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748150185] [2022-04-06 16:36:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:30,751 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:30,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1401831711] [2022-04-06 16:36:30,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:30,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:30,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:30,753 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:30,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 16:36:30,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:30,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:30,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:36:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 16:36:30,909 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:36:30,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748150185] [2022-04-06 16:36:30,910 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:30,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401831711] [2022-04-06 16:36:30,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1401831711] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:30,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:30,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:30,911 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:30,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1017060854] [2022-04-06 16:36:30,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1017060854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:30,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:30,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:30,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316759929] [2022-04-06 16:36:30,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:30,911 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:36:30,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:36:30,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:36:30,912 INFO L87 Difference]: Start difference. First operand 55 states and 71 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:36:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:30,960 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2022-04-06 16:36:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:36:30,961 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-04-06 16:36:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:30,962 INFO L225 Difference]: With dead ends: 62 [2022-04-06 16:36:30,962 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 16:36:30,963 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 16:36:30,965 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:30,965 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 151 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:36:30,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 16:36:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 16:36:30,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 32 states have (on average 1.125) internal successors, (36), 35 states have internal predecessors, (36), 20 states have call successors, (20), 7 states have call predecessors, (20), 6 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 16:36:30,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 74 transitions. [2022-04-06 16:36:30,979 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 74 transitions. Word has length 55 [2022-04-06 16:36:30,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:30,979 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 74 transitions. [2022-04-06 16:36:30,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 16:36:30,979 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 74 transitions. [2022-04-06 16:36:30,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 16:36:30,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:30,982 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:30,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:31,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:31,199 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:31,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:31,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-04-06 16:36:31,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:31,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1823264841] [2022-04-06 16:36:31,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:31,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 2 times [2022-04-06 16:36:31,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:31,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824431503] [2022-04-06 16:36:31,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:31,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:31,214 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:31,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873272858] [2022-04-06 16:36:31,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:31,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:31,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:31,221 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:31,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 16:36:31,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:31,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:31,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 16:36:31,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:31,449 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 16:36:31,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:31,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824431503] [2022-04-06 16:36:31,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873272858] [2022-04-06 16:36:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873272858] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:36:31,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:36:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 16:36:31,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:31,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1823264841] [2022-04-06 16:36:31,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1823264841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:31,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:31,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:36:31,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531067755] [2022-04-06 16:36:31,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:31,536 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:36:31,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:31,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:36:31,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:36:31,536 INFO L87 Difference]: Start difference. First operand 59 states and 74 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 16:36:31,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:31,623 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2022-04-06 16:36:31,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 16:36:31,623 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-04-06 16:36:31,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:31,627 INFO L225 Difference]: With dead ends: 66 [2022-04-06 16:36:31,627 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 16:36:31,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-04-06 16:36:31,629 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:31,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 164 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:36:31,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 16:36:31,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 16:36:31,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 38 states have internal predecessors, (39), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 16:36:31,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2022-04-06 16:36:31,648 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 60 [2022-04-06 16:36:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:31,649 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2022-04-06 16:36:31,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-04-06 16:36:31,649 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2022-04-06 16:36:31,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 16:36:31,651 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:31,652 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:31,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:31,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:31,871 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:31,872 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 1 times [2022-04-06 16:36:31,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:31,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [267881402] [2022-04-06 16:36:31,872 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:31,873 INFO L85 PathProgramCache]: Analyzing trace with hash -669670075, now seen corresponding path program 2 times [2022-04-06 16:36:31,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:31,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301476735] [2022-04-06 16:36:31,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:31,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:31,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:31,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713009970] [2022-04-06 16:36:31,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:31,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:31,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:31,887 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:31,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 16:36:31,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:31,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:31,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 16:36:31,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:32,051 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 16:36:32,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:32,161 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2022-04-06 16:36:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301476735] [2022-04-06 16:36:32,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:32,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713009970] [2022-04-06 16:36:32,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713009970] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 16:36:32,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:36:32,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 16:36:32,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:32,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [267881402] [2022-04-06 16:36:32,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [267881402] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:32,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:32,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:32,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520067377] [2022-04-06 16:36:32,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:32,162 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:36:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:36:32,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:36:32,163 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 16:36:32,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:32,199 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2022-04-06 16:36:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 16:36:32,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2022-04-06 16:36:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:32,200 INFO L225 Difference]: With dead ends: 69 [2022-04-06 16:36:32,200 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 16:36:32,200 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 16:36:32,201 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:32,201 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 137 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:36:32,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 16:36:32,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2022-04-06 16:36:32,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 16:36:32,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-04-06 16:36:32,207 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 67 [2022-04-06 16:36:32,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:32,207 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-04-06 16:36:32,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2022-04-06 16:36:32,207 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-04-06 16:36:32,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 16:36:32,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:32,208 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:32,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:32,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:32,423 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:32,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-04-06 16:36:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:32,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1170088378] [2022-04-06 16:36:32,424 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:32,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 2 times [2022-04-06 16:36:32,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:32,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921253328] [2022-04-06 16:36:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:32,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:32,432 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:32,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [308883582] [2022-04-06 16:36:32,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:32,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:32,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:32,433 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:32,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 16:36:32,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:32,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:32,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 16:36:32,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 16:36:32,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-04-06 16:36:32,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:32,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921253328] [2022-04-06 16:36:32,677 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308883582] [2022-04-06 16:36:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308883582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:36:32,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:36:32,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:36:32,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:32,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1170088378] [2022-04-06 16:36:32,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1170088378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:32,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:32,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:36:32,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244081337] [2022-04-06 16:36:32,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:32,678 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:36:32,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:32,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:36:32,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:36:32,678 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:36:32,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:32,807 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-04-06 16:36:32,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:36:32,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-04-06 16:36:32,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:32,808 INFO L225 Difference]: With dead ends: 106 [2022-04-06 16:36:32,808 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 16:36:32,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:36:32,809 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:32,809 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 259 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:36:32,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 16:36:32,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-04-06 16:36:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 16:36:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-04-06 16:36:32,820 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-04-06 16:36:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:32,820 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-04-06 16:36:32,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 16:36:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-04-06 16:36:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 16:36:32,821 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:32,821 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:32,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:33,037 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:33,037 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:33,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:33,037 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-04-06 16:36:33,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [432705700] [2022-04-06 16:36:33,038 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:33,038 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 2 times [2022-04-06 16:36:33,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:33,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878706536] [2022-04-06 16:36:33,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:33,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:33,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560663710] [2022-04-06 16:36:33,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:33,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:33,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:33,048 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:33,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 16:36:33,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:33,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:33,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 16:36:33,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:33,221 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:36:33,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 16:36:33,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:33,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878706536] [2022-04-06 16:36:33,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560663710] [2022-04-06 16:36:33,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560663710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:36:33,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:36:33,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 13 [2022-04-06 16:36:33,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:33,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [432705700] [2022-04-06 16:36:33,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [432705700] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:33,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:33,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:36:33,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983133895] [2022-04-06 16:36:33,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:33,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:36:33,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:33,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:36:33,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 16:36:33,352 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:36:33,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:33,499 INFO L93 Difference]: Finished difference Result 124 states and 173 transitions. [2022-04-06 16:36:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:36:33,499 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 16:36:33,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:33,500 INFO L225 Difference]: With dead ends: 124 [2022-04-06 16:36:33,500 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 16:36:33,501 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-04-06 16:36:33,501 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 21 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:33,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 244 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:36:33,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 16:36:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2022-04-06 16:36:33,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 64 states have internal predecessors, (75), 47 states have call successors, (47), 9 states have call predecessors, (47), 8 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:36:33,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 166 transitions. [2022-04-06 16:36:33,514 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 166 transitions. Word has length 75 [2022-04-06 16:36:33,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:33,514 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 166 transitions. [2022-04-06 16:36:33,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 16:36:33,514 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 166 transitions. [2022-04-06 16:36:33,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 16:36:33,515 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:33,515 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:33,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:33,737 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 16:36:33,738 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:33,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 3 times [2022-04-06 16:36:33,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:33,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1351274629] [2022-04-06 16:36:33,738 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:33,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 4 times [2022-04-06 16:36:33,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:33,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184083929] [2022-04-06 16:36:33,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:33,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:33,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:33,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1265950389] [2022-04-06 16:36:33,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:36:33,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:33,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:33,753 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:33,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 16:36:33,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:36:33,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 16:36:33,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 16:36:34,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:34,759 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 16:36:34,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184083929] [2022-04-06 16:36:34,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265950389] [2022-04-06 16:36:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265950389] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:36:34,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:36:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 23 [2022-04-06 16:36:34,760 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:34,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1351274629] [2022-04-06 16:36:34,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1351274629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:34,760 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:34,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:36:34,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857826572] [2022-04-06 16:36:34,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:34,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:36:34,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:34,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:36:34,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:36:34,761 INFO L87 Difference]: Start difference. First operand 118 states and 166 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 16:36:35,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:35,273 INFO L93 Difference]: Finished difference Result 134 states and 179 transitions. [2022-04-06 16:36:35,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:36:35,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) Word has length 80 [2022-04-06 16:36:35,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:35,278 INFO L225 Difference]: With dead ends: 134 [2022-04-06 16:36:35,278 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 16:36:35,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:36:35,279 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:35,279 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 199 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 502 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 16:36:35,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 16:36:35,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 16:36:35,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 73 states have internal predecessors, (84), 47 states have call successors, (47), 12 states have call predecessors, (47), 11 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:36:35,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-04-06 16:36:35,295 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 80 [2022-04-06 16:36:35,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:35,296 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-04-06 16:36:35,296 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 11 states have internal predecessors, (28), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 8 states have call predecessors, (13), 7 states have call successors, (13) [2022-04-06 16:36:35,296 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-04-06 16:36:35,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 16:36:35,297 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:35,297 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:35,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:35,508 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 16:36:35,508 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:35,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 5 times [2022-04-06 16:36:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:35,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1283715822] [2022-04-06 16:36:35,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:35,509 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 6 times [2022-04-06 16:36:35,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:35,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512099680] [2022-04-06 16:36:35,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:35,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:35,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:35,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1208634602] [2022-04-06 16:36:35,516 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:36:35,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:35,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:35,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 16:36:35,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:36:35,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:35,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 16:36:35,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-04-06 16:36:35,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:35,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512099680] [2022-04-06 16:36:35,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208634602] [2022-04-06 16:36:35,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208634602] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:36:35,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:36:35,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 16:36:35,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:35,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1283715822] [2022-04-06 16:36:35,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1283715822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:35,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:35,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 16:36:35,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085564291] [2022-04-06 16:36:35,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:35,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 16:36:35,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:35,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 16:36:35,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:36:35,966 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:36:36,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:36,163 INFO L93 Difference]: Finished difference Result 142 states and 185 transitions. [2022-04-06 16:36:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 16:36:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-04-06 16:36:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:36,165 INFO L225 Difference]: With dead ends: 142 [2022-04-06 16:36:36,165 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 16:36:36,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:36:36,165 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:36,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 193 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:36:36,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 16:36:36,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 138. [2022-04-06 16:36:36,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 77 states have (on average 1.1688311688311688) internal successors, (90), 79 states have internal predecessors, (90), 47 states have call successors, (47), 14 states have call predecessors, (47), 13 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-04-06 16:36:36,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 181 transitions. [2022-04-06 16:36:36,179 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 181 transitions. Word has length 85 [2022-04-06 16:36:36,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:36,179 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 181 transitions. [2022-04-06 16:36:36,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 16:36:36,180 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 181 transitions. [2022-04-06 16:36:36,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 16:36:36,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:36,180 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:36,198 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:36,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 16:36:36,395 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:36,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:36,396 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-04-06 16:36:36,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:36,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779307797] [2022-04-06 16:36:36,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:36,396 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 2 times [2022-04-06 16:36:36,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:36,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327035487] [2022-04-06 16:36:36,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:36,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:36,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:36,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051848548] [2022-04-06 16:36:36,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:36,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:36,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:36,404 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:36,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 16:36:36,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:36,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:36,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 16:36:36,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:36,846 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 16:36:36,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:36:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 16:36:37,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327035487] [2022-04-06 16:36:37,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:37,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051848548] [2022-04-06 16:36:37,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051848548] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:36:37,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:36:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 16:36:37,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:37,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779307797] [2022-04-06 16:36:37,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779307797] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:37,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:37,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 16:36:37,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322743186] [2022-04-06 16:36:37,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:37,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 16:36:37,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 16:36:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 16:36:37,119 INFO L87 Difference]: Start difference. First operand 138 states and 181 transitions. Second operand has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 16:36:37,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:37,362 INFO L93 Difference]: Finished difference Result 165 states and 217 transitions. [2022-04-06 16:36:37,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 16:36:37,362 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 91 [2022-04-06 16:36:37,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:37,363 INFO L225 Difference]: With dead ends: 165 [2022-04-06 16:36:37,363 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 16:36:37,363 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:36:37,364 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 19 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:37,364 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 275 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:36:37,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 16:36:37,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2022-04-06 16:36:37,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 90 states have (on average 1.1666666666666667) internal successors, (105), 92 states have internal predecessors, (105), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:36:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 212 transitions. [2022-04-06 16:36:37,379 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 212 transitions. Word has length 91 [2022-04-06 16:36:37,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:37,380 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 212 transitions. [2022-04-06 16:36:37,380 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.875) internal successors, (23), 8 states have internal predecessors, (23), 5 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 16:36:37,380 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 212 transitions. [2022-04-06 16:36:37,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 16:36:37,381 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:37,381 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:37,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:37,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 16:36:37,595 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 7 times [2022-04-06 16:36:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:37,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [364104278] [2022-04-06 16:36:37,596 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -663071842, now seen corresponding path program 8 times [2022-04-06 16:36:37,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:37,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362760083] [2022-04-06 16:36:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:37,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:37,603 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:37,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [853439956] [2022-04-06 16:36:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:37,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:37,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:37,611 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:37,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 16:36:37,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:37,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:37,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 16:36:37,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 16:36:37,775 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 16:36:37,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:36:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362760083] [2022-04-06 16:36:37,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:36:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853439956] [2022-04-06 16:36:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853439956] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:37,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:37,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:37,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:36:37,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [364104278] [2022-04-06 16:36:37,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [364104278] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:36:37,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:36:37,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 16:36:37,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568907937] [2022-04-06 16:36:37,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:36:37,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 16:36:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:37,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 16:36:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 16:36:37,778 INFO L87 Difference]: Start difference. First operand 161 states and 212 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 16:36:37,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:36:37,844 INFO L93 Difference]: Finished difference Result 209 states and 286 transitions. [2022-04-06 16:36:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 16:36:37,845 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 100 [2022-04-06 16:36:37,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:36:37,846 INFO L225 Difference]: With dead ends: 209 [2022-04-06 16:36:37,846 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 16:36:37,846 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:36:37,847 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 16:36:37,847 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 163 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 16:36:37,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 16:36:37,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 155. [2022-04-06 16:36:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 84 states have (on average 1.119047619047619) internal successors, (94), 86 states have internal predecessors, (94), 55 states have call successors, (55), 16 states have call predecessors, (55), 15 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:36:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 201 transitions. [2022-04-06 16:36:37,862 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 201 transitions. Word has length 100 [2022-04-06 16:36:37,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:36:37,862 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 201 transitions. [2022-04-06 16:36:37,862 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2022-04-06 16:36:37,862 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 201 transitions. [2022-04-06 16:36:37,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 16:36:37,863 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:36:37,863 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:36:37,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 16:36:38,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 16:36:38,079 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:36:38,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:36:38,080 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-04-06 16:36:38,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:36:38,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [192198353] [2022-04-06 16:36:38,080 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:36:38,080 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 2 times [2022-04-06 16:36:38,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:36:38,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278214886] [2022-04-06 16:36:38,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:36:38,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:36:38,087 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:36:38,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195738248] [2022-04-06 16:36:38,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:36:38,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:36:38,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:36:38,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:36:38,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 16:36:38,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:36:38,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:36:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 16:36:38,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:36:39,089 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 90 proven. 49 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2022-04-06 16:36:39,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:01,886 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 84 proven. 40 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 16:37:01,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278214886] [2022-04-06 16:37:01,887 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195738248] [2022-04-06 16:37:01,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195738248] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:01,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:01,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-04-06 16:37:01,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:01,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [192198353] [2022-04-06 16:37:01,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [192198353] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:01,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:01,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 16:37:01,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469907269] [2022-04-06 16:37:01,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:01,888 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 16:37:01,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:01,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 16:37:01,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:37:01,888 INFO L87 Difference]: Start difference. First operand 155 states and 201 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:37:03,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:03,136 INFO L93 Difference]: Finished difference Result 162 states and 207 transitions. [2022-04-06 16:37:03,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:37:03,137 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 107 [2022-04-06 16:37:03,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:03,138 INFO L225 Difference]: With dead ends: 162 [2022-04-06 16:37:03,138 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 16:37:03,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 188 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=158, Invalid=654, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:37:03,138 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:03,139 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 190 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 16:37:03,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 16:37:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-04-06 16:37:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 89 states have internal predecessors, (97), 55 states have call successors, (55), 17 states have call predecessors, (55), 16 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2022-04-06 16:37:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 204 transitions. [2022-04-06 16:37:03,154 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 204 transitions. Word has length 107 [2022-04-06 16:37:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:03,154 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 204 transitions. [2022-04-06 16:37:03,155 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2022-04-06 16:37:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 204 transitions. [2022-04-06 16:37:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 16:37:03,155 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:03,155 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:03,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:03,364 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 16:37:03,364 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:03,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 3 times [2022-04-06 16:37:03,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:03,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1652265289] [2022-04-06 16:37:03,365 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1185765869, now seen corresponding path program 4 times [2022-04-06 16:37:03,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:03,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437748001] [2022-04-06 16:37:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:03,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:03,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2023770210] [2022-04-06 16:37:03,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:37:03,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:03,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:03,376 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:03,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 16:37:03,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:37:03,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:03,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:37:03,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:03,865 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:37:05,203 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 81 proven. 59 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 16:37:05,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:06,524 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:37:06,525 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:37:09,430 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:37:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 75 proven. 50 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2022-04-06 16:37:32,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437748001] [2022-04-06 16:37:32,200 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:32,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023770210] [2022-04-06 16:37:32,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023770210] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:32,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:32,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 30 [2022-04-06 16:37:32,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:32,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1652265289] [2022-04-06 16:37:32,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1652265289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:32,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:32,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 16:37:32,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3019965] [2022-04-06 16:37:32,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:32,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 16:37:32,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:32,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 16:37:32,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=714, Unknown=2, NotChecked=0, Total=870 [2022-04-06 16:37:32,203 INFO L87 Difference]: Start difference. First operand 159 states and 204 transitions. Second operand has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 16:37:34,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:34,092 INFO L93 Difference]: Finished difference Result 192 states and 250 transitions. [2022-04-06 16:37:34,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 16:37:34,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) Word has length 113 [2022-04-06 16:37:34,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:34,094 INFO L225 Difference]: With dead ends: 192 [2022-04-06 16:37:34,094 INFO L226 Difference]: Without dead ends: 189 [2022-04-06 16:37:34,094 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 196 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=202, Invalid=986, Unknown=2, NotChecked=0, Total=1190 [2022-04-06 16:37:34,095 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 44 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:34,095 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 279 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 16:37:34,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-04-06 16:37:34,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2022-04-06 16:37:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 104 states have internal predecessors, (114), 67 states have call successors, (67), 19 states have call predecessors, (67), 18 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2022-04-06 16:37:34,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 245 transitions. [2022-04-06 16:37:34,115 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 245 transitions. Word has length 113 [2022-04-06 16:37:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:34,115 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 245 transitions. [2022-04-06 16:37:34,115 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 10 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 9 states have call successors, (19) [2022-04-06 16:37:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 245 transitions. [2022-04-06 16:37:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 16:37:34,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:34,116 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:34,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:34,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:34,344 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 5 times [2022-04-06 16:37:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1040581596] [2022-04-06 16:37:34,345 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:34,345 INFO L85 PathProgramCache]: Analyzing trace with hash 884638574, now seen corresponding path program 6 times [2022-04-06 16:37:34,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:34,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333290331] [2022-04-06 16:37:34,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:34,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:34,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1873899164] [2022-04-06 16:37:34,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:37:34,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:34,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:34,357 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:34,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 16:37:34,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:37:34,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:34,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 16:37:34,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:34,527 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 16:37:34,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-04-06 16:37:34,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333290331] [2022-04-06 16:37:34,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:34,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873899164] [2022-04-06 16:37:34,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873899164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:34,659 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:34,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-04-06 16:37:34,659 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:34,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1040581596] [2022-04-06 16:37:34,659 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1040581596] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:34,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:34,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 16:37:34,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911046711] [2022-04-06 16:37:34,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:34,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 16:37:34,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:34,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 16:37:34,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 16:37:34,660 INFO L87 Difference]: Start difference. First operand 188 states and 245 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-04-06 16:37:34,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:34,873 INFO L93 Difference]: Finished difference Result 248 states and 345 transitions. [2022-04-06 16:37:34,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:37:34,876 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 116 [2022-04-06 16:37:34,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:34,877 INFO L225 Difference]: With dead ends: 248 [2022-04-06 16:37:34,877 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 16:37:34,878 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 227 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-04-06 16:37:34,878 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 14 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:34,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 280 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 16:37:34,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 16:37:34,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 221. [2022-04-06 16:37:34,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 115 states have (on average 1.1478260869565218) internal successors, (132), 117 states have internal predecessors, (132), 87 states have call successors, (87), 19 states have call predecessors, (87), 18 states have return successors, (84), 84 states have call predecessors, (84), 84 states have call successors, (84) [2022-04-06 16:37:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 303 transitions. [2022-04-06 16:37:34,912 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 303 transitions. Word has length 116 [2022-04-06 16:37:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:34,913 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 303 transitions. [2022-04-06 16:37:34,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 states have internal predecessors, (28), 4 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2022-04-06 16:37:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 303 transitions. [2022-04-06 16:37:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 16:37:34,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:34,914 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 6, 6, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:34,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:35,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 16:37:35,130 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:35,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:35,130 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 3 times [2022-04-06 16:37:35,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:35,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641318007] [2022-04-06 16:37:35,131 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:35,131 INFO L85 PathProgramCache]: Analyzing trace with hash -743412771, now seen corresponding path program 4 times [2022-04-06 16:37:35,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:35,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953186696] [2022-04-06 16:37:35,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:35,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:35,137 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:35,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113900746] [2022-04-06 16:37:35,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:37:35,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:35,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:35,138 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:35,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 16:37:35,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:37:35,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 16:37:35,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:35,349 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 16:37:35,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 352 trivial. 0 not checked. [2022-04-06 16:37:35,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:35,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953186696] [2022-04-06 16:37:35,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:35,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113900746] [2022-04-06 16:37:35,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113900746] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:35,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:35,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 16:37:35,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:35,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641318007] [2022-04-06 16:37:35,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641318007] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:35,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:35,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 16:37:35,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520743849] [2022-04-06 16:37:35,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:35,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 16:37:35,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:35,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 16:37:35,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 16:37:35,511 INFO L87 Difference]: Start difference. First operand 221 states and 303 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:37:35,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:35,739 INFO L93 Difference]: Finished difference Result 235 states and 314 transitions. [2022-04-06 16:37:35,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 16:37:35,740 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 122 [2022-04-06 16:37:35,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:35,742 INFO L225 Difference]: With dead ends: 235 [2022-04-06 16:37:35,742 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 16:37:35,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 16:37:35,742 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:35,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 156 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:37:35,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 16:37:35,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-04-06 16:37:35,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 124 states have (on average 1.1370967741935485) internal successors, (141), 125 states have internal predecessors, (141), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:37:35,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 309 transitions. [2022-04-06 16:37:35,768 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 309 transitions. Word has length 122 [2022-04-06 16:37:35,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:35,768 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 309 transitions. [2022-04-06 16:37:35,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 3 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 16:37:35,768 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 309 transitions. [2022-04-06 16:37:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 16:37:35,774 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:35,774 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:35,792 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:35,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 16:37:35,983 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 5 times [2022-04-06 16:37:35,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1561681363] [2022-04-06 16:37:35,985 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:35,985 INFO L85 PathProgramCache]: Analyzing trace with hash 541794983, now seen corresponding path program 6 times [2022-04-06 16:37:35,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:35,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619664334] [2022-04-06 16:37:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:35,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:35,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:35,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1248342806] [2022-04-06 16:37:35,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:37:35,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:35,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:35,994 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:35,995 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 16:37:36,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:37:36,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 16:37:36,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:37:36,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2022-04-06 16:37:37,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619664334] [2022-04-06 16:37:37,782 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248342806] [2022-04-06 16:37:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248342806] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:37:37,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:37:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-04-06 16:37:37,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1561681363] [2022-04-06 16:37:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1561681363] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:37,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:37:37,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754223146] [2022-04-06 16:37:37,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:37,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:37:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:37:37,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-04-06 16:37:37,784 INFO L87 Difference]: Start difference. First operand 231 states and 309 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:37:38,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:38,368 INFO L93 Difference]: Finished difference Result 269 states and 358 transitions. [2022-04-06 16:37:38,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 16:37:38,368 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) Word has length 127 [2022-04-06 16:37:38,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:38,370 INFO L225 Difference]: With dead ends: 269 [2022-04-06 16:37:38,370 INFO L226 Difference]: Without dead ends: 267 [2022-04-06 16:37:38,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 234 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2022-04-06 16:37:38,370 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 22 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:38,371 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 351 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 16:37:38,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-04-06 16:37:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 264. [2022-04-06 16:37:38,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 142 states have (on average 1.1338028169014085) internal successors, (161), 143 states have internal predecessors, (161), 97 states have call successors, (97), 25 states have call predecessors, (97), 24 states have return successors, (95), 95 states have call predecessors, (95), 95 states have call successors, (95) [2022-04-06 16:37:38,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 353 transitions. [2022-04-06 16:37:38,401 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 353 transitions. Word has length 127 [2022-04-06 16:37:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:38,402 INFO L478 AbstractCegarLoop]: Abstraction has 264 states and 353 transitions. [2022-04-06 16:37:38,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 6 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:37:38,402 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 353 transitions. [2022-04-06 16:37:38,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 16:37:38,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:38,403 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:38,421 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:38,611 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 16:37:38,612 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:38,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:38,612 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 7 times [2022-04-06 16:37:38,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:38,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008330662] [2022-04-06 16:37:38,613 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:38,613 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 8 times [2022-04-06 16:37:38,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:38,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653880250] [2022-04-06 16:37:38,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:38,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:38,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:38,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181383102] [2022-04-06 16:37:38,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:37:38,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:38,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:38,623 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:38,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 16:37:38,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:37:38,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:38,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 72 conjunts are in the unsatisfiable core [2022-04-06 16:37:38,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 145 proven. 85 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-04-06 16:37:39,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:37:43,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:37:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653880250] [2022-04-06 16:37:43,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:37:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181383102] [2022-04-06 16:37:43,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181383102] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:37:43,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:37:43,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:37:43,049 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:37:43,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008330662] [2022-04-06 16:37:43,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008330662] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:37:43,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:37:43,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:37:43,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510612888] [2022-04-06 16:37:43,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:37:43,050 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:37:43,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:43,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:37:43,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2022-04-06 16:37:43,051 INFO L87 Difference]: Start difference. First operand 264 states and 353 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:37:47,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:37:47,307 INFO L93 Difference]: Finished difference Result 272 states and 360 transitions. [2022-04-06 16:37:47,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:37:47,308 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-04-06 16:37:47,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:37:47,309 INFO L225 Difference]: With dead ends: 272 [2022-04-06 16:37:47,309 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 16:37:47,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:37:47,310 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 38 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:37:47,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 307 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 16:37:47,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 16:37:47,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 235. [2022-04-06 16:37:47,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 127 states have (on average 1.1338582677165354) internal successors, (144), 128 states have internal predecessors, (144), 85 states have call successors, (85), 23 states have call predecessors, (85), 22 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:37:47,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 312 transitions. [2022-04-06 16:37:47,340 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 312 transitions. Word has length 129 [2022-04-06 16:37:47,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:37:47,340 INFO L478 AbstractCegarLoop]: Abstraction has 235 states and 312 transitions. [2022-04-06 16:37:47,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 9 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 16:37:47,340 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 312 transitions. [2022-04-06 16:37:47,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 16:37:47,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:37:47,341 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:37:47,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 16:37:47,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:47,543 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:37:47,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:37:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 9 times [2022-04-06 16:37:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:37:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1894804047] [2022-04-06 16:37:47,544 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:37:47,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 10 times [2022-04-06 16:37:47,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:37:47,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786704919] [2022-04-06 16:37:47,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:37:47,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:37:47,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:37:47,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [951640723] [2022-04-06 16:37:47,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:37:47,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:37:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:37:47,559 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:37:47,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 16:37:47,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:37:47,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:37:47,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 16:37:47,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:37:48,861 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 121 proven. 114 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-04-06 16:37:48,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:38:14,394 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse7 (* c_main_~s~0 c_main_~k~0)) (.cse8 (* (- 1) c_main_~q~0 c_main_~k~0))) (let ((.cse11 (* (- 1) c_main_~q~0 c_main_~x~0 c_main_~k~0)) (.cse13 (* (- 1) c_main_~s~0 c_main_~y~0)) (.cse14 (* (- 1) c_main_~s~0 c_main_~y~0 c_main_~k~0)) (.cse1 (* c_main_~p~0 c_main_~x~0)) (.cse0 (* c_main_~r~0 c_main_~y~0)) (.cse15 (* (- 1) c_main_~q~0 c_main_~x~0)) (.cse12 (+ c_main_~p~0 .cse8)) (.cse16 (+ c_main_~r~0 (* (- 1) .cse7)))) (let ((.cse9 (* .cse16 c_main_~y~0)) (.cse10 (* .cse12 c_main_~x~0)) (.cse2 (+ c_main_~b~0 .cse11 .cse13 .cse14 .cse1 .cse0 .cse15))) (or (<= (+ c_main_~b~0 (* 2 .cse0) (* 2 .cse1)) (+ (* (* c_main_~q~0 c_main_~x~0) 2) (* 2 (* c_main_~s~0 c_main_~y~0)) (* 2 (* c_main_~q~0 c_main_~x~0 c_main_~k~0)) (* 2 (* c_main_~s~0 c_main_~y~0 c_main_~k~0)))) (not (= c_main_~c~0 .cse2)) (let ((.cse4 (+ c_main_~q~0 (* (- 1) c_main_~p~0) (* (- 1) .cse8))) (.cse6 (+ c_main_~s~0 .cse7 (* (- 1) c_main_~r~0)))) (let ((.cse3 (* .cse6 c_main_~y~0)) (.cse5 (* .cse4 c_main_~x~0))) (= (+ .cse3 (* .cse4 c_main_~xy~0) .cse5 (* c_main_~yy~0 .cse6)) (+ (* (+ .cse3 .cse5) c_main_~y~0) .cse3 .cse5)))) (not (= (+ .cse9 .cse10) .cse2)) (<= c_main_~b~0 c_main_~c~0) (not (= (+ c_main_~b~0 .cse11 (* c_main_~xy~0 .cse12) .cse13 .cse14 .cse1 .cse0 .cse15 (* c_main_~yy~0 .cse16)) (+ .cse9 .cse10 (* .cse2 c_main_~y~0)))))))) is different from true [2022-04-06 16:39:02,543 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_main_~xy~0_BEFORE_CALL_89 Int) (v_main_~k~0_BEFORE_CALL_123 Int) (v_main_~s~0_BEFORE_CALL_202 Int) (v_main_~x~0_BEFORE_CALL_219 Int) (v_main_~q~0_BEFORE_CALL_207 Int) (v_main_~r~0_BEFORE_CALL_165 Int) (v_main_~yy~0_BEFORE_CALL_85 Int) (v_main_~y~0_BEFORE_CALL_216 Int) (v_main_~p~0_BEFORE_CALL_159 Int)) (let ((.cse13 (* v_main_~k~0_BEFORE_CALL_123 v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse12 (* v_main_~k~0_BEFORE_CALL_123 v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202)) (.cse3 (* v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202)) (.cse4 (* v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse0 (* v_main_~p~0_BEFORE_CALL_159 v_main_~x~0_BEFORE_CALL_219)) (.cse2 (* v_main_~y~0_BEFORE_CALL_216 v_main_~r~0_BEFORE_CALL_165)) (.cse11 (* v_main_~k~0_BEFORE_CALL_123 v_main_~s~0_BEFORE_CALL_202)) (.cse10 (* (- 1) v_main_~k~0_BEFORE_CALL_123 v_main_~q~0_BEFORE_CALL_207))) (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (not (let ((.cse9 (+ v_main_~r~0_BEFORE_CALL_165 (* (- 1) .cse11))) (.cse1 (* (- 1) v_main_~k~0_BEFORE_CALL_123 v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse8 (+ v_main_~p~0_BEFORE_CALL_159 .cse10)) (.cse5 (* (- 1) v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202)) (.cse6 (* (- 1) v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse7 (* (- 1) v_main_~k~0_BEFORE_CALL_123 v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202))) (= (+ (* v_main_~y~0_BEFORE_CALL_216 (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7)) (* .cse8 v_main_~x~0_BEFORE_CALL_219) (* .cse9 v_main_~y~0_BEFORE_CALL_216)) (+ (* .cse9 v_main_~yy~0_BEFORE_CALL_85) .cse0 .cse1 .cse2 .cse3 .cse4 (* .cse8 v_main_~xy~0_BEFORE_CALL_89) .cse5 .cse6 .cse7)))) (<= (+ (* 2 .cse2) (* 2 .cse0)) (+ (* 2 .cse12) (* .cse13 2) .cse3 .cse4)) (<= (+ .cse13 .cse12 .cse3 .cse4) (+ .cse0 .cse2)) (let ((.cse16 (+ (* (- 1) v_main_~p~0_BEFORE_CALL_159) (* (- 1) .cse10) v_main_~q~0_BEFORE_CALL_207)) (.cse17 (+ (* (- 1) v_main_~r~0_BEFORE_CALL_165) v_main_~s~0_BEFORE_CALL_202 .cse11))) (let ((.cse14 (* v_main_~y~0_BEFORE_CALL_216 .cse17)) (.cse15 (* .cse16 v_main_~x~0_BEFORE_CALL_219))) (= (+ .cse14 .cse15 (* v_main_~y~0_BEFORE_CALL_216 (+ .cse14 .cse15))) (+ .cse14 (* .cse16 v_main_~xy~0_BEFORE_CALL_89) .cse15 (* v_main_~yy~0_BEFORE_CALL_85 .cse17)))))))) is different from false [2022-04-06 16:39:04,546 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~xy~0_BEFORE_CALL_89 Int) (v_main_~k~0_BEFORE_CALL_123 Int) (v_main_~s~0_BEFORE_CALL_202 Int) (v_main_~x~0_BEFORE_CALL_219 Int) (v_main_~q~0_BEFORE_CALL_207 Int) (v_main_~r~0_BEFORE_CALL_165 Int) (v_main_~yy~0_BEFORE_CALL_85 Int) (v_main_~y~0_BEFORE_CALL_216 Int) (v_main_~p~0_BEFORE_CALL_159 Int)) (let ((.cse13 (* v_main_~k~0_BEFORE_CALL_123 v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse12 (* v_main_~k~0_BEFORE_CALL_123 v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202)) (.cse3 (* v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202)) (.cse4 (* v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse0 (* v_main_~p~0_BEFORE_CALL_159 v_main_~x~0_BEFORE_CALL_219)) (.cse2 (* v_main_~y~0_BEFORE_CALL_216 v_main_~r~0_BEFORE_CALL_165)) (.cse11 (* v_main_~k~0_BEFORE_CALL_123 v_main_~s~0_BEFORE_CALL_202)) (.cse10 (* (- 1) v_main_~k~0_BEFORE_CALL_123 v_main_~q~0_BEFORE_CALL_207))) (or (not (= |c___VERIFIER_assert_#in~cond| 0)) (not (let ((.cse9 (+ v_main_~r~0_BEFORE_CALL_165 (* (- 1) .cse11))) (.cse1 (* (- 1) v_main_~k~0_BEFORE_CALL_123 v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse8 (+ v_main_~p~0_BEFORE_CALL_159 .cse10)) (.cse5 (* (- 1) v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202)) (.cse6 (* (- 1) v_main_~x~0_BEFORE_CALL_219 v_main_~q~0_BEFORE_CALL_207)) (.cse7 (* (- 1) v_main_~k~0_BEFORE_CALL_123 v_main_~y~0_BEFORE_CALL_216 v_main_~s~0_BEFORE_CALL_202))) (= (+ (* v_main_~y~0_BEFORE_CALL_216 (+ .cse0 .cse1 .cse2 .cse3 .cse4 .cse5 .cse6 .cse7)) (* .cse8 v_main_~x~0_BEFORE_CALL_219) (* .cse9 v_main_~y~0_BEFORE_CALL_216)) (+ (* .cse9 v_main_~yy~0_BEFORE_CALL_85) .cse0 .cse1 .cse2 .cse3 .cse4 (* .cse8 v_main_~xy~0_BEFORE_CALL_89) .cse5 .cse6 .cse7)))) (<= (+ (* 2 .cse2) (* 2 .cse0)) (+ (* 2 .cse12) (* .cse13 2) .cse3 .cse4)) (<= (+ .cse13 .cse12 .cse3 .cse4) (+ .cse0 .cse2)) (let ((.cse16 (+ (* (- 1) v_main_~p~0_BEFORE_CALL_159) (* (- 1) .cse10) v_main_~q~0_BEFORE_CALL_207)) (.cse17 (+ (* (- 1) v_main_~r~0_BEFORE_CALL_165) v_main_~s~0_BEFORE_CALL_202 .cse11))) (let ((.cse14 (* v_main_~y~0_BEFORE_CALL_216 .cse17)) (.cse15 (* .cse16 v_main_~x~0_BEFORE_CALL_219))) (= (+ .cse14 .cse15 (* v_main_~y~0_BEFORE_CALL_216 (+ .cse14 .cse15))) (+ .cse14 (* .cse16 v_main_~xy~0_BEFORE_CALL_89) .cse15 (* v_main_~yy~0_BEFORE_CALL_85 .cse17)))))))) is different from true [2022-04-06 16:39:04,695 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 141 proven. 51 refuted. 8 times theorem prover too weak. 345 trivial. 5 not checked. [2022-04-06 16:39:04,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:04,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786704919] [2022-04-06 16:39:04,696 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951640723] [2022-04-06 16:39:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951640723] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:04,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:04,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-04-06 16:39:04,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:04,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1894804047] [2022-04-06 16:39:04,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1894804047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:04,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:04,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 16:39:04,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967707940] [2022-04-06 16:39:04,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:04,698 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 16:39:04,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:04,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 16:39:04,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=557, Unknown=4, NotChecked=102, Total=812 [2022-04-06 16:39:04,699 INFO L87 Difference]: Start difference. First operand 235 states and 312 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:39:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:06,589 INFO L93 Difference]: Finished difference Result 244 states and 320 transitions. [2022-04-06 16:39:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:39:06,590 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) Word has length 132 [2022-04-06 16:39:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:06,591 INFO L225 Difference]: With dead ends: 244 [2022-04-06 16:39:06,591 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 16:39:06,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 232 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=240, Invalid=954, Unknown=4, NotChecked=134, Total=1332 [2022-04-06 16:39:06,592 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 40 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:06,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 282 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 16:39:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 16:39:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2022-04-06 16:39:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 130 states have (on average 1.1307692307692307) internal successors, (147), 131 states have internal predecessors, (147), 85 states have call successors, (85), 24 states have call predecessors, (85), 23 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 16:39:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 315 transitions. [2022-04-06 16:39:06,631 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 315 transitions. Word has length 132 [2022-04-06 16:39:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:06,632 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 315 transitions. [2022-04-06 16:39:06,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:39:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 315 transitions. [2022-04-06 16:39:06,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 16:39:06,633 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:06,633 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:06,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:06,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:06,847 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:06,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 7 times [2022-04-06 16:39:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:06,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150843701] [2022-04-06 16:39:06,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:06,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1068997356, now seen corresponding path program 8 times [2022-04-06 16:39:06,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:06,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809622306] [2022-04-06 16:39:06,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:06,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:06,854 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:06,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1565703599] [2022-04-06 16:39:06,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:06,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:06,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:06,858 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:06,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 16:39:06,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:06,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 44 conjunts are in the unsatisfiable core [2022-04-06 16:39:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 610 backedges. 67 proven. 48 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2022-04-06 16:39:07,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:07,676 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:07,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809622306] [2022-04-06 16:39:07,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565703599] [2022-04-06 16:39:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565703599] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:39:07,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:39:07,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 16:39:07,792 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:07,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150843701] [2022-04-06 16:39:07,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150843701] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:07,793 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:07,793 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 16:39:07,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607172165] [2022-04-06 16:39:07,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:07,793 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 16:39:07,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:07,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 16:39:07,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-04-06 16:39:07,793 INFO L87 Difference]: Start difference. First operand 239 states and 315 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 16:39:08,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:08,556 INFO L93 Difference]: Finished difference Result 280 states and 374 transitions. [2022-04-06 16:39:08,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:39:08,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) Word has length 135 [2022-04-06 16:39:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:08,558 INFO L225 Difference]: With dead ends: 280 [2022-04-06 16:39:08,558 INFO L226 Difference]: Without dead ends: 277 [2022-04-06 16:39:08,558 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-04-06 16:39:08,559 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:08,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 288 Invalid, 734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 16:39:08,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-04-06 16:39:08,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 274. [2022-04-06 16:39:08,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 147 states have (on average 1.1360544217687074) internal successors, (167), 148 states have internal predecessors, (167), 101 states have call successors, (101), 26 states have call predecessors, (101), 25 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-04-06 16:39:08,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 367 transitions. [2022-04-06 16:39:08,593 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 367 transitions. Word has length 135 [2022-04-06 16:39:08,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:08,594 INFO L478 AbstractCegarLoop]: Abstraction has 274 states and 367 transitions. [2022-04-06 16:39:08,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 7 states have call successors, (23) [2022-04-06 16:39:08,594 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 367 transitions. [2022-04-06 16:39:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-04-06 16:39:08,595 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:08,595 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:08,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:08,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 16:39:08,812 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:08,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 9 times [2022-04-06 16:39:08,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:08,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [876339242] [2022-04-06 16:39:08,812 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:08,812 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 10 times [2022-04-06 16:39:08,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:08,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451525496] [2022-04-06 16:39:08,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:08,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:08,825 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:08,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681373772] [2022-04-06 16:39:08,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:08,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:08,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:08,827 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:08,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 16:39:08,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:08,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:08,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 16:39:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:10,001 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:10,003 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:10,005 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:10,018 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:10,019 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:10,027 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 142 proven. 92 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2022-04-06 16:39:10,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:12,577 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 154 proven. 12 refuted. 0 times theorem prover too weak. 449 trivial. 0 not checked. [2022-04-06 16:39:12,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451525496] [2022-04-06 16:39:12,753 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681373772] [2022-04-06 16:39:12,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681373772] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:12,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:12,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 29 [2022-04-06 16:39:12,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:12,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [876339242] [2022-04-06 16:39:12,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [876339242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:12,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:12,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 16:39:12,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798660067] [2022-04-06 16:39:12,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:12,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 16:39:12,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:12,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 16:39:12,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-04-06 16:39:12,754 INFO L87 Difference]: Start difference. First operand 274 states and 367 transitions. Second operand has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2022-04-06 16:39:16,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:16,764 INFO L93 Difference]: Finished difference Result 315 states and 426 transitions. [2022-04-06 16:39:16,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 16:39:16,775 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) Word has length 138 [2022-04-06 16:39:16,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:16,776 INFO L225 Difference]: With dead ends: 315 [2022-04-06 16:39:16,777 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 16:39:16,777 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=209, Invalid=1123, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 16:39:16,778 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 49 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:16,778 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 320 Invalid, 1224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 16:39:16,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 16:39:16,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 309. [2022-04-06 16:39:16,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 165 states have internal predecessors, (187), 117 states have call successors, (117), 28 states have call predecessors, (117), 27 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 16:39:16,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 419 transitions. [2022-04-06 16:39:16,825 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 419 transitions. Word has length 138 [2022-04-06 16:39:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:16,825 INFO L478 AbstractCegarLoop]: Abstraction has 309 states and 419 transitions. [2022-04-06 16:39:16,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 11 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (23), 9 states have call predecessors, (23), 10 states have call successors, (23) [2022-04-06 16:39:16,825 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 419 transitions. [2022-04-06 16:39:16,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 16:39:16,826 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:16,826 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:16,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:17,036 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 16:39:17,036 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:17,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 11 times [2022-04-06 16:39:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:17,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148347446] [2022-04-06 16:39:17,037 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:17,037 INFO L85 PathProgramCache]: Analyzing trace with hash -604751514, now seen corresponding path program 12 times [2022-04-06 16:39:17,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:17,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108543940] [2022-04-06 16:39:17,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:17,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:17,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:17,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548085741] [2022-04-06 16:39:17,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:39:17,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:17,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:17,044 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:17,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 16:39:17,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:39:17,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:17,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 16:39:17,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:17,760 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 109 proven. 76 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-04-06 16:39:17,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:18,156 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 149 proven. 31 refuted. 0 times theorem prover too weak. 587 trivial. 0 not checked. [2022-04-06 16:39:18,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:18,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108543940] [2022-04-06 16:39:18,156 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:18,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548085741] [2022-04-06 16:39:18,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548085741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:18,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:18,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 17 [2022-04-06 16:39:18,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:18,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148347446] [2022-04-06 16:39:18,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148347446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:18,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:18,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 16:39:18,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488561532] [2022-04-06 16:39:18,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:18,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 16:39:18,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:18,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 16:39:18,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 16:39:18,158 INFO L87 Difference]: Start difference. First operand 309 states and 419 transitions. Second operand has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:39:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:18,952 INFO L93 Difference]: Finished difference Result 348 states and 469 transitions. [2022-04-06 16:39:18,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 16:39:18,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) Word has length 149 [2022-04-06 16:39:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:18,954 INFO L225 Difference]: With dead ends: 348 [2022-04-06 16:39:18,954 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 16:39:18,955 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 280 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 16:39:18,955 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 39 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:18,955 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 327 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:39:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 16:39:19,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2022-04-06 16:39:19,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 182 states have (on average 1.1373626373626373) internal successors, (207), 183 states have internal predecessors, (207), 129 states have call successors, (129), 31 states have call predecessors, (129), 30 states have return successors, (127), 127 states have call predecessors, (127), 127 states have call successors, (127) [2022-04-06 16:39:19,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 463 transitions. [2022-04-06 16:39:19,002 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 463 transitions. Word has length 149 [2022-04-06 16:39:19,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:19,003 INFO L478 AbstractCegarLoop]: Abstraction has 342 states and 463 transitions. [2022-04-06 16:39:19,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 7 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 7 states have call predecessors, (21), 6 states have call successors, (21) [2022-04-06 16:39:19,003 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 463 transitions. [2022-04-06 16:39:19,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 16:39:19,004 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:19,004 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:19,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:19,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:19,204 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:19,205 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 13 times [2022-04-06 16:39:19,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:19,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1675059241] [2022-04-06 16:39:19,205 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:19,205 INFO L85 PathProgramCache]: Analyzing trace with hash -162755237, now seen corresponding path program 14 times [2022-04-06 16:39:19,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:19,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092704591] [2022-04-06 16:39:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:19,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:19,211 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:19,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1511058620] [2022-04-06 16:39:19,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:39:19,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:19,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:19,213 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:19,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 16:39:19,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:39:19,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:19,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 16:39:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:19,535 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 244 proven. 53 refuted. 0 times theorem prover too weak. 543 trivial. 0 not checked. [2022-04-06 16:39:19,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 58 proven. 53 refuted. 0 times theorem prover too weak. 729 trivial. 0 not checked. [2022-04-06 16:39:20,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092704591] [2022-04-06 16:39:20,212 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:20,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511058620] [2022-04-06 16:39:20,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511058620] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:39:20,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:39:20,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 19 [2022-04-06 16:39:20,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:20,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1675059241] [2022-04-06 16:39:20,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1675059241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:20,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:20,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 16:39:20,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239074941] [2022-04-06 16:39:20,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:20,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 16:39:20,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:20,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 16:39:20,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2022-04-06 16:39:20,214 INFO L87 Difference]: Start difference. First operand 342 states and 463 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-04-06 16:39:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:20,653 INFO L93 Difference]: Finished difference Result 419 states and 562 transitions. [2022-04-06 16:39:20,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 16:39:20,654 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 151 [2022-04-06 16:39:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:20,655 INFO L225 Difference]: With dead ends: 419 [2022-04-06 16:39:20,655 INFO L226 Difference]: Without dead ends: 314 [2022-04-06 16:39:20,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 283 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2022-04-06 16:39:20,657 INFO L913 BasicCegarLoop]: 68 mSDtfsCounter, 38 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:20,657 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 355 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 16:39:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-04-06 16:39:20,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 313. [2022-04-06 16:39:20,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 167 states have (on average 1.1317365269461077) internal successors, (189), 168 states have internal predecessors, (189), 117 states have call successors, (117), 29 states have call predecessors, (117), 28 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 16:39:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 421 transitions. [2022-04-06 16:39:20,722 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 421 transitions. Word has length 151 [2022-04-06 16:39:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:20,722 INFO L478 AbstractCegarLoop]: Abstraction has 313 states and 421 transitions. [2022-04-06 16:39:20,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-04-06 16:39:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 421 transitions. [2022-04-06 16:39:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 16:39:20,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:20,723 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:20,740 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 16:39:20,924 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:20,924 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:20,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 15 times [2022-04-06 16:39:20,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:20,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [140879417] [2022-04-06 16:39:20,925 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:20,925 INFO L85 PathProgramCache]: Analyzing trace with hash 1672449564, now seen corresponding path program 16 times [2022-04-06 16:39:20,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:20,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399841926] [2022-04-06 16:39:20,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:20,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:20,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:20,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772172946] [2022-04-06 16:39:20,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 16:39:20,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:20,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:20,934 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:20,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 16:39:20,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 16:39:20,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:20,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 16:39:20,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:21,773 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:21,774 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 167 proven. 78 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2022-04-06 16:39:24,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:25,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:25,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399841926] [2022-04-06 16:39:25,974 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:25,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772172946] [2022-04-06 16:39:25,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772172946] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:39:25,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:39:25,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 16:39:25,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [140879417] [2022-04-06 16:39:25,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [140879417] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:25,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:25,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:39:25,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230024915] [2022-04-06 16:39:25,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:25,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:39:25,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:25,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:39:25,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2022-04-06 16:39:25,976 INFO L87 Difference]: Start difference. First operand 313 states and 421 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-04-06 16:39:27,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:39:27,341 INFO L93 Difference]: Finished difference Result 324 states and 430 transitions. [2022-04-06 16:39:27,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:39:27,342 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 154 [2022-04-06 16:39:27,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:39:27,343 INFO L225 Difference]: With dead ends: 324 [2022-04-06 16:39:27,343 INFO L226 Difference]: Without dead ends: 322 [2022-04-06 16:39:27,344 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-04-06 16:39:27,344 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 30 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 120 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 16:39:27,344 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 319 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 664 Invalid, 0 Unknown, 120 Unchecked, 1.2s Time] [2022-04-06 16:39:27,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-04-06 16:39:27,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 321. [2022-04-06 16:39:27,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 173 states have (on average 1.1271676300578035) internal successors, (195), 174 states have internal predecessors, (195), 117 states have call successors, (117), 31 states have call predecessors, (117), 30 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 16:39:27,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 427 transitions. [2022-04-06 16:39:27,390 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 427 transitions. Word has length 154 [2022-04-06 16:39:27,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:39:27,390 INFO L478 AbstractCegarLoop]: Abstraction has 321 states and 427 transitions. [2022-04-06 16:39:27,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 13 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-04-06 16:39:27,390 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 427 transitions. [2022-04-06 16:39:27,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 16:39:27,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:39:27,391 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:39:27,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 16:39:27,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 16:39:27,608 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:39:27,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:39:27,608 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 17 times [2022-04-06 16:39:27,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:27,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113047182] [2022-04-06 16:39:27,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:39:27,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2059109762, now seen corresponding path program 18 times [2022-04-06 16:39:27,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:39:27,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520550067] [2022-04-06 16:39:27,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:39:27,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:39:27,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:39:27,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505495913] [2022-04-06 16:39:27,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:39:27,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:39:27,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:39:27,615 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:39:27,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 16:39:27,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 16:39:27,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:39:27,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 16:39:27,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:39:29,325 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:39:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 132 proven. 80 refuted. 0 times theorem prover too weak. 633 trivial. 0 not checked. [2022-04-06 16:39:30,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:39:52,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:39:52,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520550067] [2022-04-06 16:39:52,688 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:39:52,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505495913] [2022-04-06 16:39:52,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505495913] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 16:39:52,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 16:39:52,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 16:39:52,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:39:52,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113047182] [2022-04-06 16:39:52,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113047182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:39:52,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:39:52,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 16:39:52,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16961199] [2022-04-06 16:39:52,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:39:52,689 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 16:39:52,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:39:52,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 16:39:52,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=646, Unknown=7, NotChecked=0, Total=812 [2022-04-06 16:39:52,690 INFO L87 Difference]: Start difference. First operand 321 states and 427 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:40:03,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:40:03,896 INFO L93 Difference]: Finished difference Result 331 states and 436 transitions. [2022-04-06 16:40:03,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 16:40:03,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) Word has length 154 [2022-04-06 16:40:03,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:40:03,898 INFO L225 Difference]: With dead ends: 331 [2022-04-06 16:40:03,898 INFO L226 Difference]: Without dead ends: 329 [2022-04-06 16:40:03,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 197 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=237, Invalid=1015, Unknown=8, NotChecked=0, Total=1260 [2022-04-06 16:40:03,898 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 53 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 16:40:03,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 224 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 646 Invalid, 0 Unknown, 77 Unchecked, 1.7s Time] [2022-04-06 16:40:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2022-04-06 16:40:03,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 325. [2022-04-06 16:40:03,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 176 states have (on average 1.125) internal successors, (198), 177 states have internal predecessors, (198), 117 states have call successors, (117), 32 states have call predecessors, (117), 31 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 16:40:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 430 transitions. [2022-04-06 16:40:03,948 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 430 transitions. Word has length 154 [2022-04-06 16:40:03,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:40:03,948 INFO L478 AbstractCegarLoop]: Abstraction has 325 states and 430 transitions. [2022-04-06 16:40:03,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 7 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 8 states have call predecessors, (22), 7 states have call successors, (22) [2022-04-06 16:40:03,948 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 430 transitions. [2022-04-06 16:40:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 16:40:03,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:40:03,949 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:40:03,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 16:40:04,154 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 16:40:04,155 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:40:04,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:40:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 11 times [2022-04-06 16:40:04,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:04,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [841818258] [2022-04-06 16:40:04,155 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:40:04,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1023835477, now seen corresponding path program 12 times [2022-04-06 16:40:04,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:40:04,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976395636] [2022-04-06 16:40:04,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:40:04,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:40:04,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:40:04,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571299662] [2022-04-06 16:40:04,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 16:40:04,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:40:04,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:40:04,163 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:40:04,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 16:40:04,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 16:40:04,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:40:04,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 16:40:04,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:40:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 89 proven. 112 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-04-06 16:40:05,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 16:40:06,005 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 16:40:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 107 proven. 85 refuted. 0 times theorem prover too weak. 730 trivial. 0 not checked. [2022-04-06 16:40:11,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 16:40:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976395636] [2022-04-06 16:40:11,453 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 16:40:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571299662] [2022-04-06 16:40:11,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571299662] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 16:40:11,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 16:40:11,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 26 [2022-04-06 16:40:11,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 16:40:11,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [841818258] [2022-04-06 16:40:11,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [841818258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 16:40:11,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 16:40:11,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 16:40:11,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934493446] [2022-04-06 16:40:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 16:40:11,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 16:40:11,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:11,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 16:40:11,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=543, Unknown=2, NotChecked=0, Total=650 [2022-04-06 16:40:11,455 INFO L87 Difference]: Start difference. First operand 325 states and 430 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 16:40:12,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 16:40:12,479 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2022-04-06 16:40:12,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 16:40:12,480 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 157 [2022-04-06 16:40:12,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 16:40:12,481 INFO L225 Difference]: With dead ends: 341 [2022-04-06 16:40:12,481 INFO L226 Difference]: Without dead ends: 338 [2022-04-06 16:40:12,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 288 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=165, Invalid=825, Unknown=2, NotChecked=0, Total=992 [2022-04-06 16:40:12,482 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 35 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 16:40:12,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 227 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 16:40:12,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-04-06 16:40:12,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 337. [2022-04-06 16:40:12,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 185 states have (on average 1.1135135135135135) internal successors, (206), 186 states have internal predecessors, (206), 117 states have call successors, (117), 35 states have call predecessors, (117), 34 states have return successors, (115), 115 states have call predecessors, (115), 115 states have call successors, (115) [2022-04-06 16:40:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 438 transitions. [2022-04-06 16:40:12,533 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 438 transitions. Word has length 157 [2022-04-06 16:40:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 16:40:12,533 INFO L478 AbstractCegarLoop]: Abstraction has 337 states and 438 transitions. [2022-04-06 16:40:12,533 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 16:40:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 438 transitions. [2022-04-06 16:40:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 16:40:12,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 16:40:12,534 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 16:40:12,550 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 16:40:12,743 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 16:40:12,743 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 16:40:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 16:40:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 13 times [2022-04-06 16:40:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 16:40:12,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [309698353] [2022-04-06 16:40:12,744 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 16:40:12,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1001336492, now seen corresponding path program 14 times [2022-04-06 16:40:12,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 16:40:12,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464275446] [2022-04-06 16:40:12,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 16:40:12,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 16:40:12,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 16:40:12,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042311296] [2022-04-06 16:40:12,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 16:40:12,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 16:40:12,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 16:40:12,750 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 16:40:12,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 16:40:12,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 16:40:12,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 16:40:12,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 16:40:12,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 16:40:14,095 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 193 proven. 82 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-04-06 16:40:14,096 INFO L328 TraceCheckSpWp]: Computing backward predicates...