/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/loops-crafted-1/mono-crafted_9.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 13:19:49,305 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 13:19:49,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 13:19:49,349 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 13:19:49,393 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 13:19:49,393 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 13:19:49,401 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 13:19:49,402 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 13:19:49,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 13:19:49,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 13:19:49,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 13:19:49,414 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 13:19:49,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 13:19:49,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 13:19:49,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 13:19:49,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 13:19:49,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 13:19:49,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 13:19:49,416 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 13:19:49,416 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 13:19:49,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 13:19:49,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 13:19:49,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 13:19:49,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 13:19:49,417 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 13:19:49,417 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 13:19:49,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:19:49,418 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 13:19:49,418 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 13:19:49,418 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 13:19:49,418 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 13:19:49,418 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 13:19:49,418 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 13:19:49,418 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 13:19:49,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 13:19:49,662 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 13:19:49,664 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 13:19:49,665 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 13:19:49,667 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 13:19:49,668 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-20 13:19:49,724 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e8747365/93089191966c4fa595b6af1b160462a7/FLAGf361b2616 [2022-03-20 13:19:50,081 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 13:19:50,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c [2022-03-20 13:19:50,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e8747365/93089191966c4fa595b6af1b160462a7/FLAGf361b2616 [2022-03-20 13:19:50,507 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e8747365/93089191966c4fa595b6af1b160462a7 [2022-03-20 13:19:50,510 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 13:19:50,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 13:19:50,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 13:19:50,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 13:19:50,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 13:19:50,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbbc0d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50, skipping insertion in model container [2022-03-20 13:19:50,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,525 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 13:19:50,536 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 13:19:50,645 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-20 13:19:50,655 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:19:50,670 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 13:19:50,685 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_9.c[318,331] [2022-03-20 13:19:50,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 13:19:50,696 INFO L208 MainTranslator]: Completed translation [2022-03-20 13:19:50,697 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50 WrapperNode [2022-03-20 13:19:50,697 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 13:19:50,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 13:19:50,698 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 13:19:50,698 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 13:19:50,706 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,706 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,713 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,713 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,717 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 13:19:50,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 13:19:50,723 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 13:19:50,723 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 13:19:50,724 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (1/1) ... [2022-03-20 13:19:50,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 13:19:50,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:50,764 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 13:19:50,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 13:19:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 13:19:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 13:19:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 13:19:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 13:19:50,805 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 13:19:50,805 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 13:19:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 13:19:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 13:19:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 13:19:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 13:19:50,806 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 13:19:50,807 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 13:19:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 13:19:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 13:19:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 13:19:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 13:19:50,808 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 13:19:50,867 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 13:19:50,869 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 13:19:50,942 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 13:19:50,948 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 13:19:50,948 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 13:19:50,949 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:19:50 BoogieIcfgContainer [2022-03-20 13:19:50,949 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 13:19:50,951 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 13:19:50,951 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 13:19:50,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 13:19:50,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 01:19:50" (1/3) ... [2022-03-20 13:19:50,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f62fc43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:19:50, skipping insertion in model container [2022-03-20 13:19:50,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 01:19:50" (2/3) ... [2022-03-20 13:19:50,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f62fc43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 01:19:50, skipping insertion in model container [2022-03-20 13:19:50,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 01:19:50" (3/3) ... [2022-03-20 13:19:50,961 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_9.c [2022-03-20 13:19:50,965 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 13:19:50,965 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 13:19:51,002 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 13:19:51,008 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 13:19:51,008 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 13:19:51,020 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-03-20 13:19:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:19:51,026 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:51,026 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:51,027 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:51,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 1 times [2022-03-20 13:19:51,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296541587] [2022-03-20 13:19:51,047 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:19:51,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1325153485, now seen corresponding path program 2 times [2022-03-20 13:19:51,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:51,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600397137] [2022-03-20 13:19:51,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:51,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:51,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:51,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:51,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:51,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:51,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:51,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600397137] [2022-03-20 13:19:51,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600397137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:51,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:51,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:19:51,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:51,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296541587] [2022-03-20 13:19:51,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296541587] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:51,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:51,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 13:19:51,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811723571] [2022-03-20 13:19:51,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:51,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 13:19:51,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 13:19:51,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:19:51,220 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:51,272 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-20 13:19:51,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 13:19:51,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 13:19:51,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:51,280 INFO L225 Difference]: With dead ends: 32 [2022-03-20 13:19:51,280 INFO L226 Difference]: Without dead ends: 13 [2022-03-20 13:19:51,282 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 13:19:51,285 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:51,286 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:19:51,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-03-20 13:19:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-03-20 13:19:51,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-03-20 13:19:51,329 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-03-20 13:19:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:51,331 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-03-20 13:19:51,331 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-03-20 13:19:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-20 13:19:51,337 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:51,337 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:51,338 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 13:19:51,338 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:51,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:51,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 1 times [2022-03-20 13:19:51,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973629883] [2022-03-20 13:19:51,340 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 13:19:51,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1315918275, now seen corresponding path program 2 times [2022-03-20 13:19:51,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:51,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803514844] [2022-03-20 13:19:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:51,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:51,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:51,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:51,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:51,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803514844] [2022-03-20 13:19:51,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803514844] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:51,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:51,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:19:51,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:51,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973629883] [2022-03-20 13:19:51,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973629883] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:51,463 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:51,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 13:19:51,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565533287] [2022-03-20 13:19:51,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:51,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 13:19:51,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 13:19:51,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 13:19:51,465 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:51,507 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-03-20 13:19:51,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 13:19:51,507 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-03-20 13:19:51,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:51,508 INFO L225 Difference]: With dead ends: 22 [2022-03-20 13:19:51,508 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 13:19:51,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 13:19:51,510 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:51,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:19:51,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 13:19:51,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 13:19:51,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-03-20 13:19:51,516 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-03-20 13:19:51,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:51,517 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-03-20 13:19:51,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,517 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-03-20 13:19:51,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-20 13:19:51,518 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:51,518 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:51,518 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 13:19:51,518 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:51,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:51,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1372110560, now seen corresponding path program 1 times [2022-03-20 13:19:51,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [587357741] [2022-03-20 13:19:51,598 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:51,598 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1209153456, now seen corresponding path program 1 times [2022-03-20 13:19:51,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:51,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390780563] [2022-03-20 13:19:51,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:51,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:51,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:51,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:51,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:51,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390780563] [2022-03-20 13:19:51,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390780563] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:51,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:51,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:19:51,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:51,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [587357741] [2022-03-20 13:19:51,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [587357741] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:51,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:51,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 13:19:51,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256022023] [2022-03-20 13:19:51,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:51,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 13:19:51,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 13:19:51,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-03-20 13:19:51,779 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:51,858 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-03-20 13:19:51,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 13:19:51,859 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-03-20 13:19:51,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:51,860 INFO L225 Difference]: With dead ends: 22 [2022-03-20 13:19:51,860 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 13:19:51,861 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-03-20 13:19:51,865 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 10 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:51,870 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 23 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:19:51,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 13:19:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 13:19:51,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-20 13:19:51,882 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-03-20 13:19:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:51,883 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-20 13:19:51,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-20 13:19:51,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-20 13:19:51,884 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:51,884 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:51,884 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 13:19:51,884 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:51,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:51,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1059749499, now seen corresponding path program 1 times [2022-03-20 13:19:51,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:51,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1192433176] [2022-03-20 13:19:51,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:52,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:52,027 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:52,029 INFO L85 PathProgramCache]: Analyzing trace with hash 603671471, now seen corresponding path program 1 times [2022-03-20 13:19:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:52,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271144239] [2022-03-20 13:19:52,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:52,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:52,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:52,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:52,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:52,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271144239] [2022-03-20 13:19:52,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271144239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:52,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724563772] [2022-03-20 13:19:52,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:52,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:52,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:52,193 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:52,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 13:19:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:52,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:52,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:52,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:52,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724563772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:52,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:52,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:19:52,979 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:52,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1192433176] [2022-03-20 13:19:52,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1192433176] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:52,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:52,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 13:19:52,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427855232] [2022-03-20 13:19:52,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:52,980 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 13:19:52,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:52,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 13:19:52,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-03-20 13:19:52,981 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:53,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:53,130 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2022-03-20 13:19:53,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:19:53,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-20 13:19:53,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:53,131 INFO L225 Difference]: With dead ends: 31 [2022-03-20 13:19:53,131 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 13:19:53,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:19:53,133 INFO L913 BasicCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:53,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 36 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:19:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 13:19:53,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 13:19:53,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:53,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-03-20 13:19:53,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2022-03-20 13:19:53,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:53,138 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-03-20 13:19:53,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 7 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:53,139 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-03-20 13:19:53,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-03-20 13:19:53,139 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:53,139 INFO L499 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:53,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 13:19:53,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:53,359 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:53,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1662437453, now seen corresponding path program 2 times [2022-03-20 13:19:53,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:53,359 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367587232] [2022-03-20 13:19:53,397 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:53,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:53,450 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:53,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1641763665, now seen corresponding path program 1 times [2022-03-20 13:19:53,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:53,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575321186] [2022-03-20 13:19:53,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:53,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:53,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:53,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:53,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:53,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:53,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575321186] [2022-03-20 13:19:53,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575321186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:53,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196277619] [2022-03-20 13:19:53,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:53,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:53,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:53,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:53,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 13:19:53,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:53,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:53,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:53,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:53,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:53,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196277619] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:53,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:53,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:19:54,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:54,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367587232] [2022-03-20 13:19:54,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367587232] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:54,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:54,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-03-20 13:19:54,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483131357] [2022-03-20 13:19:54,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:54,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 13:19:54,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:54,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 13:19:54,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-03-20 13:19:54,119 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:54,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:54,233 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2022-03-20 13:19:54,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 13:19:54,233 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-03-20 13:19:54,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:54,234 INFO L225 Difference]: With dead ends: 30 [2022-03-20 13:19:54,234 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 13:19:54,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:19:54,235 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:54,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 13:19:54,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 13:19:54,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 13:19:54,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:54,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2022-03-20 13:19:54,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2022-03-20 13:19:54,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:54,240 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2022-03-20 13:19:54,240 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:54,241 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2022-03-20 13:19:54,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-20 13:19:54,241 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:54,241 INFO L499 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:54,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 13:19:54,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:54,452 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:54,452 INFO L85 PathProgramCache]: Analyzing trace with hash 361874638, now seen corresponding path program 3 times [2022-03-20 13:19:54,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:54,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834463794] [2022-03-20 13:19:54,487 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:54,550 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:54,550 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:54,550 INFO L85 PathProgramCache]: Analyzing trace with hash 407768495, now seen corresponding path program 1 times [2022-03-20 13:19:54,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:54,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654669611] [2022-03-20 13:19:54,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:54,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:54,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:54,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:54,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:54,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654669611] [2022-03-20 13:19:54,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654669611] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:54,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360006880] [2022-03-20 13:19:54,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:54,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:54,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:54,653 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:54,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 13:19:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:54,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:54,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:54,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:55,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:55,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360006880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:55,007 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:55,007 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:19:55,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:55,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834463794] [2022-03-20 13:19:55,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834463794] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:55,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:55,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 13:19:55,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887099938] [2022-03-20 13:19:55,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:55,139 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 13:19:55,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 13:19:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-03-20 13:19:55,145 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:55,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:55,319 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2022-03-20 13:19:55,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 13:19:55,320 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-03-20 13:19:55,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:55,321 INFO L225 Difference]: With dead ends: 32 [2022-03-20 13:19:55,321 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 13:19:55,321 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=186, Invalid=626, Unknown=0, NotChecked=0, Total=812 [2022-03-20 13:19:55,322 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:55,322 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 53 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:19:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 13:19:55,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 13:19:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-03-20 13:19:55,327 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 21 [2022-03-20 13:19:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:55,327 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-03-20 13:19:55,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.7) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-03-20 13:19:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-20 13:19:55,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:55,328 INFO L499 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:55,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 13:19:55,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:55,544 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:55,544 INFO L85 PathProgramCache]: Analyzing trace with hash 105609001, now seen corresponding path program 4 times [2022-03-20 13:19:55,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:55,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [242384860] [2022-03-20 13:19:55,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:55,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:55,640 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:55,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1837666641, now seen corresponding path program 1 times [2022-03-20 13:19:55,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:55,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812827232] [2022-03-20 13:19:55,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:55,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:55,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:55,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:55,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812827232] [2022-03-20 13:19:55,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812827232] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:55,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590009669] [2022-03-20 13:19:55,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:55,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:55,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:55,745 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:55,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 13:19:55,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:55,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:55,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:55,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:55,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:56,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590009669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:56,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:56,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:19:56,295 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:56,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [242384860] [2022-03-20 13:19:56,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [242384860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:56,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:56,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-20 13:19:56,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835708033] [2022-03-20 13:19:56,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:56,296 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 13:19:56,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:56,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 13:19:56,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:19:56,297 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:56,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:56,469 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2022-03-20 13:19:56,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 13:19:56,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-20 13:19:56,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:56,470 INFO L225 Difference]: With dead ends: 34 [2022-03-20 13:19:56,470 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 13:19:56,471 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=725, Unknown=0, NotChecked=0, Total=930 [2022-03-20 13:19:56,471 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:56,472 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:19:56,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 13:19:56,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 13:19:56,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:56,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2022-03-20 13:19:56,477 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2022-03-20 13:19:56,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:56,477 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2022-03-20 13:19:56,477 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2022-03-20 13:19:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 13:19:56,478 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:56,478 INFO L499 BasicCegarLoop]: trace histogram [7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:56,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 13:19:56,692 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:56,692 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1352532284, now seen corresponding path program 5 times [2022-03-20 13:19:56,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:56,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1283708908] [2022-03-20 13:19:56,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:56,779 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:56,779 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:56,780 INFO L85 PathProgramCache]: Analyzing trace with hash 211865519, now seen corresponding path program 1 times [2022-03-20 13:19:56,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:56,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212511406] [2022-03-20 13:19:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:56,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:56,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:56,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212511406] [2022-03-20 13:19:56,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212511406] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:56,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945541390] [2022-03-20 13:19:56,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:56,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:56,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:56,876 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:56,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 13:19:56,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:56,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:57,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:57,217 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:57,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945541390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:57,218 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:57,218 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:19:57,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:57,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1283708908] [2022-03-20 13:19:57,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1283708908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:57,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:57,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 13:19:57,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070647764] [2022-03-20 13:19:57,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:57,372 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 13:19:57,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:57,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 13:19:57,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-03-20 13:19:57,373 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:57,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:57,560 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2022-03-20 13:19:57,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 13:19:57,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-03-20 13:19:57,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:57,561 INFO L225 Difference]: With dead ends: 36 [2022-03-20 13:19:57,561 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 13:19:57,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:19:57,562 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:57,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 33 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:19:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 13:19:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 13:19:57,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2022-03-20 13:19:57,566 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 25 [2022-03-20 13:19:57,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:57,567 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2022-03-20 13:19:57,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2022-03-20 13:19:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 13:19:57,567 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:57,567 INFO L499 BasicCegarLoop]: trace histogram [8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:57,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 13:19:57,768 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:57,768 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:57,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1827998623, now seen corresponding path program 6 times [2022-03-20 13:19:57,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:57,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569052884] [2022-03-20 13:19:57,798 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:57,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:57,840 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:57,841 INFO L85 PathProgramCache]: Analyzing trace with hash -2033569617, now seen corresponding path program 1 times [2022-03-20 13:19:57,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:57,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913177667] [2022-03-20 13:19:57,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:57,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:57,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:57,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:57,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913177667] [2022-03-20 13:19:57,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913177667] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:57,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304525347] [2022-03-20 13:19:57,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:57,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:57,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:57,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:57,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 13:19:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:57,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:57,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:58,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:58,295 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:58,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304525347] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:58,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:58,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:19:58,486 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:58,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569052884] [2022-03-20 13:19:58,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569052884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:58,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:58,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-20 13:19:58,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843627706] [2022-03-20 13:19:58,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:58,487 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 13:19:58,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:58,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 13:19:58,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2022-03-20 13:19:58,488 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:58,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:58,714 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2022-03-20 13:19:58,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-20 13:19:58,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-03-20 13:19:58,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:58,715 INFO L225 Difference]: With dead ends: 38 [2022-03-20 13:19:58,715 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 13:19:58,716 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=243, Invalid=947, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:19:58,717 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:58,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 53 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:19:58,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 13:19:58,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 13:19:58,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:58,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-03-20 13:19:58,722 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2022-03-20 13:19:58,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:58,722 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-03-20 13:19:58,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:58,722 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-03-20 13:19:58,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 13:19:58,723 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:58,723 INFO L499 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:58,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 13:19:58,931 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:58,931 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:19:58,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:19:58,932 INFO L85 PathProgramCache]: Analyzing trace with hash 301485498, now seen corresponding path program 7 times [2022-03-20 13:19:58,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:58,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023330984] [2022-03-20 13:19:58,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:59,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:19:59,014 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:19:59,014 INFO L85 PathProgramCache]: Analyzing trace with hash 15962543, now seen corresponding path program 1 times [2022-03-20 13:19:59,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:19:59,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137597774] [2022-03-20 13:19:59,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:59,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:19:59,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:19:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:19:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137597774] [2022-03-20 13:19:59,107 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137597774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:19:59,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55455125] [2022-03-20 13:19:59,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:19:59,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:19:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:19:59,109 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:19:59,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 13:19:59,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:19:59,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:19:59,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:19:59,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:59,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:19:59,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:19:59,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55455125] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:19:59,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:19:59,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:19:59,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:19:59,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023330984] [2022-03-20 13:19:59,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023330984] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:19:59,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:19:59,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 13:19:59,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569541922] [2022-03-20 13:19:59,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:19:59,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 13:19:59,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:19:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 13:19:59,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-03-20 13:19:59,683 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:59,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:19:59,944 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2022-03-20 13:19:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 13:19:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-20 13:19:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:19:59,945 INFO L225 Difference]: With dead ends: 40 [2022-03-20 13:19:59,945 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 13:19:59,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=262, Invalid=1070, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:19:59,946 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:19:59,946 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 63 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:19:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 13:19:59,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 13:19:59,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:59,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-03-20 13:19:59,951 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2022-03-20 13:19:59,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:19:59,951 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-03-20 13:19:59,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:19:59,952 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-03-20 13:19:59,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 13:19:59,952 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:19:59,952 INFO L499 BasicCegarLoop]: trace histogram [10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:19:59,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:00,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:00,168 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:00,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2093779691, now seen corresponding path program 8 times [2022-03-20 13:20:00,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:00,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305313845] [2022-03-20 13:20:00,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:00,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:00,247 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:00,248 INFO L85 PathProgramCache]: Analyzing trace with hash 2065494703, now seen corresponding path program 1 times [2022-03-20 13:20:00,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:00,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945502080] [2022-03-20 13:20:00,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:00,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:00,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:00,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:00,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:00,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945502080] [2022-03-20 13:20:00,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945502080] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:00,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380127483] [2022-03-20 13:20:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:00,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:00,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:00,345 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:00,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 13:20:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:00,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:00,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:00,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:00,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:00,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380127483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:00,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:00,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:00,877 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:00,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305313845] [2022-03-20 13:20:00,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305313845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:00,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:00,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-03-20 13:20:00,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875419305] [2022-03-20 13:20:00,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:00,877 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 13:20:00,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:00,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 13:20:00,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=594, Unknown=0, NotChecked=0, Total=756 [2022-03-20 13:20:00,878 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:01,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:01,158 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2022-03-20 13:20:01,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 13:20:01,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-03-20 13:20:01,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:01,159 INFO L225 Difference]: With dead ends: 42 [2022-03-20 13:20:01,159 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 13:20:01,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=1201, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:20:01,160 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:01,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 13:20:01,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 13:20:01,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 13:20:01,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:01,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-03-20 13:20:01,165 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 31 [2022-03-20 13:20:01,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:01,165 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-03-20 13:20:01,165 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-03-20 13:20:01,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 13:20:01,166 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:01,166 INFO L499 BasicCegarLoop]: trace histogram [11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:01,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:01,371 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,SelfDestructingSolverStorable10 [2022-03-20 13:20:01,372 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:01,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:01,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1841155664, now seen corresponding path program 9 times [2022-03-20 13:20:01,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:01,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1494810225] [2022-03-20 13:20:01,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:01,444 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:01,444 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash -179940433, now seen corresponding path program 1 times [2022-03-20 13:20:01,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:01,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766998099] [2022-03-20 13:20:01,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:01,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:01,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:01,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:01,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:01,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:01,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766998099] [2022-03-20 13:20:01,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766998099] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:01,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126287481] [2022-03-20 13:20:01,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:01,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:01,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:01,532 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:01,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 13:20:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:01,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:01,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:01,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:01,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:01,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126287481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:01,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:01,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:02,120 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:02,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1494810225] [2022-03-20 13:20:02,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1494810225] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:02,121 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:02,121 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 13:20:02,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522469415] [2022-03-20 13:20:02,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:02,121 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 13:20:02,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:02,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 13:20:02,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2022-03-20 13:20:02,122 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:02,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:02,463 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2022-03-20 13:20:02,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 13:20:02,464 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-03-20 13:20:02,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:02,464 INFO L225 Difference]: With dead ends: 44 [2022-03-20 13:20:02,464 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 13:20:02,465 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:20:02,465 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 29 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:02,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 53 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:20:02,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 13:20:02,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 13:20:02,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:02,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-03-20 13:20:02,470 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 33 [2022-03-20 13:20:02,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:02,470 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-03-20 13:20:02,470 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-03-20 13:20:02,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 13:20:02,471 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:02,471 INFO L499 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:02,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:02,671 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:02,671 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:02,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:02,672 INFO L85 PathProgramCache]: Analyzing trace with hash 412365707, now seen corresponding path program 10 times [2022-03-20 13:20:02,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:02,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430754860] [2022-03-20 13:20:02,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:02,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:02,744 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:02,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1869591727, now seen corresponding path program 1 times [2022-03-20 13:20:02,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:02,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759299956] [2022-03-20 13:20:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:02,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:02,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:02,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759299956] [2022-03-20 13:20:02,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759299956] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:02,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686913601] [2022-03-20 13:20:02,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:02,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:02,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:02,834 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:02,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 13:20:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:02,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:02,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:03,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:03,003 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:03,168 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:03,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686913601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:03,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:03,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:03,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:03,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430754860] [2022-03-20 13:20:03,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430754860] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:03,415 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:03,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-03-20 13:20:03,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585827955] [2022-03-20 13:20:03,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:03,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 13:20:03,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:03,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 13:20:03,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:20:03,416 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:03,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:03,755 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2022-03-20 13:20:03,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 13:20:03,755 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-03-20 13:20:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:03,756 INFO L225 Difference]: With dead ends: 46 [2022-03-20 13:20:03,756 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 13:20:03,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=1487, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:20:03,757 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:03,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 73 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:20:03,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 13:20:03,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 13:20:03,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:03,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-03-20 13:20:03,762 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 35 [2022-03-20 13:20:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:03,763 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-03-20 13:20:03,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 16 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:03,763 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-03-20 13:20:03,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 13:20:03,763 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:03,763 INFO L499 BasicCegarLoop]: trace histogram [13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:03,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:03,967 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,SelfDestructingSolverStorable12 [2022-03-20 13:20:03,967 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:03,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:03,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1382886054, now seen corresponding path program 11 times [2022-03-20 13:20:03,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:03,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783558088] [2022-03-20 13:20:03,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:04,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:04,037 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:04,037 INFO L85 PathProgramCache]: Analyzing trace with hash -375843409, now seen corresponding path program 1 times [2022-03-20 13:20:04,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:04,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955783607] [2022-03-20 13:20:04,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:04,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:04,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:04,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955783607] [2022-03-20 13:20:04,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955783607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541668131] [2022-03-20 13:20:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:04,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:04,135 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:04,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 13:20:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:04,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:04,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:04,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:04,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:04,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:04,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541668131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:04,486 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:04,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:20:04,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:04,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783558088] [2022-03-20 13:20:04,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783558088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:04,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:04,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 13:20:04,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147670036] [2022-03-20 13:20:04,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:04,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 13:20:04,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:04,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 13:20:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2022-03-20 13:20:04,745 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:05,111 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-03-20 13:20:05,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 13:20:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-03-20 13:20:05,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:05,112 INFO L225 Difference]: With dead ends: 48 [2022-03-20 13:20:05,112 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 13:20:05,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=299, Invalid=1593, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:20:05,113 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:05,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 48 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:20:05,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 13:20:05,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 13:20:05,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:05,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-03-20 13:20:05,119 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 37 [2022-03-20 13:20:05,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:05,119 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-03-20 13:20:05,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-03-20 13:20:05,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-03-20 13:20:05,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:05,120 INFO L499 BasicCegarLoop]: trace histogram [14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:05,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:05,323 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,SelfDestructingSolverStorable13 [2022-03-20 13:20:05,323 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:05,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:05,324 INFO L85 PathProgramCache]: Analyzing trace with hash 2045036289, now seen corresponding path program 12 times [2022-03-20 13:20:05,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:05,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [137591788] [2022-03-20 13:20:05,348 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:05,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:05,381 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1673688751, now seen corresponding path program 1 times [2022-03-20 13:20:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:05,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739986225] [2022-03-20 13:20:05,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:05,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:05,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:05,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:05,448 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:05,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:05,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739986225] [2022-03-20 13:20:05,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739986225] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:05,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978122208] [2022-03-20 13:20:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:05,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:05,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:05,450 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:05,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 13:20:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:05,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:05,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:05,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:05,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978122208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:05,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:05,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:06,039 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [137591788] [2022-03-20 13:20:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [137591788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:06,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-03-20 13:20:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108592310] [2022-03-20 13:20:06,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:06,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 13:20:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 13:20:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=798, Unknown=0, NotChecked=0, Total=992 [2022-03-20 13:20:06,041 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:06,490 INFO L93 Difference]: Finished difference Result 50 states and 55 transitions. [2022-03-20 13:20:06,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 13:20:06,490 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-03-20 13:20:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:06,491 INFO L225 Difference]: With dead ends: 50 [2022-03-20 13:20:06,491 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 13:20:06,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=1805, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:20:06,492 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 35 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:06,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 88 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:20:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 13:20:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 13:20:06,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:06,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-03-20 13:20:06,498 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 39 [2022-03-20 13:20:06,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:06,498 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-03-20 13:20:06,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 18 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:06,498 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-03-20 13:20:06,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-03-20 13:20:06,499 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:06,499 INFO L499 BasicCegarLoop]: trace histogram [15, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:06,517 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-03-20 13:20:06,707 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,SelfDestructingSolverStorable14 [2022-03-20 13:20:06,707 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:06,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:06,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1578714980, now seen corresponding path program 13 times [2022-03-20 13:20:06,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:06,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [602826896] [2022-03-20 13:20:06,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:06,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:06,773 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:06,773 INFO L85 PathProgramCache]: Analyzing trace with hash -571746385, now seen corresponding path program 1 times [2022-03-20 13:20:06,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:06,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215343952] [2022-03-20 13:20:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:06,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:06,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:06,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:06,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215343952] [2022-03-20 13:20:06,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215343952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:06,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429091814] [2022-03-20 13:20:06,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:06,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:06,849 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:06,852 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:06,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 13:20:06,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:06,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:07,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:07,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:07,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:07,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429091814] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:07,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:07,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:07,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:07,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [602826896] [2022-03-20 13:20:07,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [602826896] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:07,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:07,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 13:20:07,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204533711] [2022-03-20 13:20:07,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:07,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 13:20:07,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 13:20:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=854, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 13:20:07,468 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:07,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:07,888 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2022-03-20 13:20:07,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 13:20:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-03-20 13:20:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:07,889 INFO L225 Difference]: With dead ends: 52 [2022-03-20 13:20:07,889 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 13:20:07,890 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=376, Invalid=1976, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 13:20:07,890 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:07,891 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 93 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:20:07,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 13:20:07,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 13:20:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-03-20 13:20:07,896 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 41 [2022-03-20 13:20:07,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:07,896 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-03-20 13:20:07,896 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.85) internal successors, (37), 19 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:07,896 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-03-20 13:20:07,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 13:20:07,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:07,897 INFO L499 BasicCegarLoop]: trace histogram [16, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:07,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:08,103 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,SelfDestructingSolverStorable15 [2022-03-20 13:20:08,103 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:08,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash -785207433, now seen corresponding path program 14 times [2022-03-20 13:20:08,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:08,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2045259121] [2022-03-20 13:20:08,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:08,182 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:08,182 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:08,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1477785775, now seen corresponding path program 1 times [2022-03-20 13:20:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:08,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223271742] [2022-03-20 13:20:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:08,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:08,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:08,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223271742] [2022-03-20 13:20:08,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223271742] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:08,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17657720] [2022-03-20 13:20:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:08,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:08,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:08,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 13:20:08,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:08,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:08,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:08,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:08,597 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17657720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:08,597 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:08,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:08,930 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:08,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2045259121] [2022-03-20 13:20:08,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2045259121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:08,930 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:08,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-03-20 13:20:08,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741570117] [2022-03-20 13:20:08,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:08,931 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 13:20:08,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:08,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 13:20:08,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=912, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 13:20:08,931 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:09,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:09,384 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2022-03-20 13:20:09,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 13:20:09,384 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-03-20 13:20:09,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:09,384 INFO L225 Difference]: With dead ends: 54 [2022-03-20 13:20:09,384 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 13:20:09,385 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 668 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 13:20:09,386 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:09,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 43 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 13:20:09,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 13:20:09,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 13:20:09,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:09,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-03-20 13:20:09,393 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 43 [2022-03-20 13:20:09,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:09,393 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-03-20 13:20:09,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 20 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:09,393 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-03-20 13:20:09,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 13:20:09,394 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:09,394 INFO L499 BasicCegarLoop]: trace histogram [17, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:09,411 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-03-20 13:20:09,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:09,599 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:09,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:09,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1566333842, now seen corresponding path program 15 times [2022-03-20 13:20:09,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:09,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1044161809] [2022-03-20 13:20:09,624 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:09,663 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:09,664 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:09,664 INFO L85 PathProgramCache]: Analyzing trace with hash -767649361, now seen corresponding path program 1 times [2022-03-20 13:20:09,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:09,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052379590] [2022-03-20 13:20:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:09,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:09,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:09,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:09,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:09,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:09,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052379590] [2022-03-20 13:20:09,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052379590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:09,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913369488] [2022-03-20 13:20:09,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:09,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:09,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:09,752 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:09,754 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 13:20:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:09,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:10,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913369488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:10,082 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:10,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:10,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:10,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1044161809] [2022-03-20 13:20:10,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1044161809] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:10,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:10,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 13:20:10,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56740537] [2022-03-20 13:20:10,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:10,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 13:20:10,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:10,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 13:20:10,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2022-03-20 13:20:10,468 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:11,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:11,013 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2022-03-20 13:20:11,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 13:20:11,014 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-03-20 13:20:11,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:11,014 INFO L225 Difference]: With dead ends: 56 [2022-03-20 13:20:11,014 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 13:20:11,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=2342, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 13:20:11,016 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 41 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:11,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 53 Invalid, 716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:20:11,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 13:20:11,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 13:20:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:11,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-03-20 13:20:11,021 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 45 [2022-03-20 13:20:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:11,021 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-03-20 13:20:11,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-03-20 13:20:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-03-20 13:20:11,022 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:11,022 INFO L499 BasicCegarLoop]: trace histogram [18, 16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:11,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 13:20:11,246 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,SelfDestructingSolverStorable17 [2022-03-20 13:20:11,246 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:11,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:11,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2050265875, now seen corresponding path program 16 times [2022-03-20 13:20:11,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:11,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371237427] [2022-03-20 13:20:11,263 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:11,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:11,313 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:11,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1281882799, now seen corresponding path program 1 times [2022-03-20 13:20:11,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:11,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015940899] [2022-03-20 13:20:11,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:11,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:11,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:11,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:11,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:11,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015940899] [2022-03-20 13:20:11,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015940899] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:11,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82147055] [2022-03-20 13:20:11,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:11,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:11,391 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:11,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 13:20:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:11,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:11,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:11,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:11,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82147055] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:11,680 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:11,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:12,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:12,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371237427] [2022-03-20 13:20:12,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371237427] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:12,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:12,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-03-20 13:20:12,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433235958] [2022-03-20 13:20:12,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:12,041 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-20 13:20:12,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:12,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-20 13:20:12,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1034, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 13:20:12,041 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:12,589 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-03-20 13:20:12,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-20 13:20:12,590 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-03-20 13:20:12,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:12,590 INFO L225 Difference]: With dead ends: 58 [2022-03-20 13:20:12,590 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 13:20:12,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=433, Invalid=2537, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 13:20:12,591 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:12,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 38 Invalid, 756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:20:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 13:20:12,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 13:20:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-03-20 13:20:12,598 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 47 [2022-03-20 13:20:12,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:12,598 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-03-20 13:20:12,598 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-03-20 13:20:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 13:20:12,598 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:12,598 INFO L499 BasicCegarLoop]: trace histogram [19, 17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:12,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:12,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:12,803 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:12,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:12,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1320915848, now seen corresponding path program 17 times [2022-03-20 13:20:12,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:12,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355318872] [2022-03-20 13:20:12,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:12,865 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:12,866 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:12,866 INFO L85 PathProgramCache]: Analyzing trace with hash -963552337, now seen corresponding path program 1 times [2022-03-20 13:20:12,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:12,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965580267] [2022-03-20 13:20:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:12,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:12,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:12,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:12,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:12,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965580267] [2022-03-20 13:20:12,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965580267] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:12,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467270305] [2022-03-20 13:20:12,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:12,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:12,929 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:12,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 13:20:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:12,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:13,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:13,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:13,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467270305] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:13,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:13,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:13,598 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:13,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355318872] [2022-03-20 13:20:13,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355318872] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:13,598 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:13,598 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 13:20:13,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835917140] [2022-03-20 13:20:13,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:13,599 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 13:20:13,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:13,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 13:20:13,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=1098, Unknown=0, NotChecked=0, Total=1332 [2022-03-20 13:20:13,600 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:14,220 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-03-20 13:20:14,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 13:20:14,220 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-03-20 13:20:14,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:14,221 INFO L225 Difference]: With dead ends: 60 [2022-03-20 13:20:14,221 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 13:20:14,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=452, Invalid=2740, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 13:20:14,222 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 45 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:14,223 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 123 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:20:14,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 13:20:14,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 13:20:14,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:14,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-03-20 13:20:14,228 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 49 [2022-03-20 13:20:14,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:14,229 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-03-20 13:20:14,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:14,229 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-03-20 13:20:14,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-20 13:20:14,229 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:14,229 INFO L499 BasicCegarLoop]: trace histogram [20, 18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:14,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:14,439 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:14,439 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:14,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:14,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1673756829, now seen corresponding path program 18 times [2022-03-20 13:20:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:14,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407174611] [2022-03-20 13:20:14,463 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:14,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:14,507 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:14,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1085979823, now seen corresponding path program 1 times [2022-03-20 13:20:14,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:14,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666746965] [2022-03-20 13:20:14,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:14,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:14,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:14,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:14,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:14,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:14,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:14,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666746965] [2022-03-20 13:20:14,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666746965] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:14,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275851255] [2022-03-20 13:20:14,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:14,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:14,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:14,576 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:14,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-20 13:20:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:14,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:14,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:14,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275851255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:14,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:14,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:15,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:15,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407174611] [2022-03-20 13:20:15,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407174611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:15,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:15,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-03-20 13:20:15,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728996764] [2022-03-20 13:20:15,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:15,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-20 13:20:15,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:15,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-20 13:20:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 13:20:15,324 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:15,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:15,916 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2022-03-20 13:20:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-20 13:20:15,916 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-03-20 13:20:15,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:15,916 INFO L225 Difference]: With dead ends: 62 [2022-03-20 13:20:15,917 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 13:20:15,918 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 850 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=2951, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 13:20:15,918 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:15,919 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 13:20:15,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 13:20:15,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 13:20:15,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:15,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-03-20 13:20:15,924 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 51 [2022-03-20 13:20:15,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:15,925 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-03-20 13:20:15,925 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.88) internal successors, (47), 24 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:15,925 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-03-20 13:20:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-03-20 13:20:15,925 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:15,925 INFO L499 BasicCegarLoop]: trace histogram [21, 19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:15,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:16,135 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:16,135 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:16,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:16,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1926111106, now seen corresponding path program 19 times [2022-03-20 13:20:16,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:16,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [54579678] [2022-03-20 13:20:16,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:16,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:16,192 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1159455313, now seen corresponding path program 1 times [2022-03-20 13:20:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:16,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104184933] [2022-03-20 13:20:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:16,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:16,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:16,274 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:16,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:16,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104184933] [2022-03-20 13:20:16,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104184933] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:16,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692856189] [2022-03-20 13:20:16,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:16,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:16,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:16,276 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:16,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-20 13:20:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:16,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:16,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:16,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:16,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692856189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:16,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:16,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:17,053 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:17,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [54579678] [2022-03-20 13:20:17,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [54579678] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:17,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:17,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 13:20:17,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607061542] [2022-03-20 13:20:17,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:17,054 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 13:20:17,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:17,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 13:20:17,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1232, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 13:20:17,055 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:17,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:17,806 INFO L93 Difference]: Finished difference Result 64 states and 69 transitions. [2022-03-20 13:20:17,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 13:20:17,807 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-03-20 13:20:17,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:17,808 INFO L225 Difference]: With dead ends: 64 [2022-03-20 13:20:17,808 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 13:20:17,809 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=490, Invalid=3170, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 13:20:17,810 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 49 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:17,810 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 78 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:20:17,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 13:20:17,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 13:20:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:17,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-03-20 13:20:17,816 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 53 [2022-03-20 13:20:17,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:17,816 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-03-20 13:20:17,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 25 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:17,816 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-03-20 13:20:17,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 13:20:17,817 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:17,817 INFO L499 BasicCegarLoop]: trace histogram [22, 20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:17,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-03-20 13:20:18,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:18,019 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:18,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:18,020 INFO L85 PathProgramCache]: Analyzing trace with hash 374564569, now seen corresponding path program 20 times [2022-03-20 13:20:18,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:18,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [137556299] [2022-03-20 13:20:18,037 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:18,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:18,082 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:18,082 INFO L85 PathProgramCache]: Analyzing trace with hash 890076847, now seen corresponding path program 1 times [2022-03-20 13:20:18,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:18,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161410405] [2022-03-20 13:20:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:18,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:18,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:18,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:18,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161410405] [2022-03-20 13:20:18,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161410405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:18,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481359534] [2022-03-20 13:20:18,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:18,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:18,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:18,151 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:18,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-20 13:20:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:18,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:18,303 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:18,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481359534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:18,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:18,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:18,953 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:18,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [137556299] [2022-03-20 13:20:18,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [137556299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:18,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:18,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-03-20 13:20:18,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696198767] [2022-03-20 13:20:18,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:18,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-20 13:20:18,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:18,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-20 13:20:18,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=1302, Unknown=0, NotChecked=0, Total=1560 [2022-03-20 13:20:18,955 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:19,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:19,704 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2022-03-20 13:20:19,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-20 13:20:19,704 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-03-20 13:20:19,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:19,705 INFO L225 Difference]: With dead ends: 66 [2022-03-20 13:20:19,705 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 13:20:19,706 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=509, Invalid=3397, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 13:20:19,706 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 51 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1193 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:19,706 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 108 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1193 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:20:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 13:20:19,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-20 13:20:19,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:19,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-03-20 13:20:19,712 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 55 [2022-03-20 13:20:19,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:19,712 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-03-20 13:20:19,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:19,712 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-03-20 13:20:19,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-03-20 13:20:19,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:19,713 INFO L499 BasicCegarLoop]: trace histogram [23, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:19,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-03-20 13:20:19,935 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,SelfDestructingSolverStorable22 [2022-03-20 13:20:19,936 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:19,936 INFO L85 PathProgramCache]: Analyzing trace with hash -584269196, now seen corresponding path program 21 times [2022-03-20 13:20:19,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:19,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [29548956] [2022-03-20 13:20:19,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:19,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:19,999 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1355358289, now seen corresponding path program 1 times [2022-03-20 13:20:19,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:19,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668974180] [2022-03-20 13:20:19,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:19,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:20,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:20,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:20,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:20,083 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:20,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:20,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668974180] [2022-03-20 13:20:20,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668974180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:20,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683513179] [2022-03-20 13:20:20,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:20,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:20,088 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:20,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-20 13:20:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:20,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:20,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:20,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:20,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683513179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:20,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:20,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:20,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:20,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [29548956] [2022-03-20 13:20:20,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [29548956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:20,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:20,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 13:20:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865653852] [2022-03-20 13:20:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:20,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 13:20:20,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:20,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 13:20:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 13:20:20,917 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:21,727 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2022-03-20 13:20:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 13:20:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-03-20 13:20:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:21,728 INFO L225 Difference]: With dead ends: 68 [2022-03-20 13:20:21,728 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 13:20:21,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=528, Invalid=3632, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 13:20:21,729 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 53 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:21,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 58 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 13:20:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 13:20:21,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 13:20:21,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:21,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-03-20 13:20:21,733 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 57 [2022-03-20 13:20:21,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:21,733 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-03-20 13:20:21,734 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:21,734 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-03-20 13:20:21,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 13:20:21,734 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:21,734 INFO L499 BasicCegarLoop]: trace histogram [24, 22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:21,751 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-03-20 13:20:21,937 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,SelfDestructingSolverStorable23 [2022-03-20 13:20:21,938 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:21,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:21,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1394451279, now seen corresponding path program 22 times [2022-03-20 13:20:21,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:21,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943975723] [2022-03-20 13:20:21,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:21,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:21,996 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:21,996 INFO L85 PathProgramCache]: Analyzing trace with hash 694173871, now seen corresponding path program 1 times [2022-03-20 13:20:21,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:21,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275785142] [2022-03-20 13:20:21,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:21,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:22,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:22,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:22,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:22,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:22,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275785142] [2022-03-20 13:20:22,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275785142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:22,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640912350] [2022-03-20 13:20:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:22,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:22,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:22,072 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:22,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-20 13:20:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:22,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:22,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:22,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640912350] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:22,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:22,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:22,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:22,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943975723] [2022-03-20 13:20:22,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943975723] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:22,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:22,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 13:20:22,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023436940] [2022-03-20 13:20:22,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:22,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 13:20:22,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:22,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 13:20:22,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=1448, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 13:20:22,876 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:23,753 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2022-03-20 13:20:23,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 13:20:23,753 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-03-20 13:20:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:23,753 INFO L225 Difference]: With dead ends: 70 [2022-03-20 13:20:23,754 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 13:20:23,754 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=547, Invalid=3875, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 13:20:23,755 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 55 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1379 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:23,755 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 108 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1379 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:20:23,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 13:20:23,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-20 13:20:23,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:23,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-03-20 13:20:23,761 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 59 [2022-03-20 13:20:23,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:23,761 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-03-20 13:20:23,761 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:23,761 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-03-20 13:20:23,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-03-20 13:20:23,761 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:23,761 INFO L499 BasicCegarLoop]: trace histogram [25, 23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:23,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:23,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:23,975 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:23,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:23,976 INFO L85 PathProgramCache]: Analyzing trace with hash 274315626, now seen corresponding path program 23 times [2022-03-20 13:20:23,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:23,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1400553643] [2022-03-20 13:20:24,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:24,034 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:24,034 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:24,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1551261265, now seen corresponding path program 1 times [2022-03-20 13:20:24,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:24,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234918930] [2022-03-20 13:20:24,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:24,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:24,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:24,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:24,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:24,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234918930] [2022-03-20 13:20:24,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234918930] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:24,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071563470] [2022-03-20 13:20:24,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:24,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:24,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:24,120 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:24,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-20 13:20:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:24,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:24,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:24,293 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:24,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:24,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071563470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:24,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:24,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:25,005 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:25,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1400553643] [2022-03-20 13:20:25,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1400553643] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:25,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:25,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-03-20 13:20:25,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061328152] [2022-03-20 13:20:25,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:25,006 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-20 13:20:25,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:25,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-20 13:20:25,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1524, Unknown=0, NotChecked=0, Total=1806 [2022-03-20 13:20:25,007 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:25,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:25,969 INFO L93 Difference]: Finished difference Result 72 states and 77 transitions. [2022-03-20 13:20:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-20 13:20:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-03-20 13:20:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:25,970 INFO L225 Difference]: With dead ends: 72 [2022-03-20 13:20:25,970 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 13:20:25,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=566, Invalid=4126, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 13:20:25,971 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 57 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 1524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:25,971 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 148 Invalid, 1579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:20:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 13:20:25,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 13:20:25,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:25,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-03-20 13:20:25,977 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 61 [2022-03-20 13:20:25,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:25,977 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-03-20 13:20:25,977 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.9) internal successors, (57), 29 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:25,977 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-03-20 13:20:25,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-03-20 13:20:25,977 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:25,977 INFO L499 BasicCegarLoop]: trace histogram [26, 24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:25,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-03-20 13:20:26,191 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:26,191 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:26,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1860744389, now seen corresponding path program 24 times [2022-03-20 13:20:26,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:26,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103124350] [2022-03-20 13:20:26,210 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:26,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:26,245 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:26,245 INFO L85 PathProgramCache]: Analyzing trace with hash 498270895, now seen corresponding path program 1 times [2022-03-20 13:20:26,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:26,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779843986] [2022-03-20 13:20:26,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:26,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:26,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:26,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:26,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:26,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779843986] [2022-03-20 13:20:26,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779843986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:26,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553743835] [2022-03-20 13:20:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:26,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:26,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:26,312 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:26,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-20 13:20:26,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:26,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:26,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553743835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:26,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:26,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:27,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:27,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103124350] [2022-03-20 13:20:27,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103124350] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:27,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:27,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 13:20:27,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733170802] [2022-03-20 13:20:27,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:27,253 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 13:20:27,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:27,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 13:20:27,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1602, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 13:20:27,253 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:28,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:28,226 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2022-03-20 13:20:28,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-20 13:20:28,227 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-03-20 13:20:28,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:28,227 INFO L225 Difference]: With dead ends: 74 [2022-03-20 13:20:28,227 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 13:20:28,228 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=585, Invalid=4385, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 13:20:28,228 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1460 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:28,228 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 53 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1460 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:20:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 13:20:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 13:20:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-03-20 13:20:28,235 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 63 [2022-03-20 13:20:28,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:28,235 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-03-20 13:20:28,235 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:28,235 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-03-20 13:20:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-20 13:20:28,235 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:28,236 INFO L499 BasicCegarLoop]: trace histogram [27, 25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:28,253 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-20 13:20:28,443 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,SelfDestructingSolverStorable26 [2022-03-20 13:20:28,443 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:28,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:28,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1705395552, now seen corresponding path program 25 times [2022-03-20 13:20:28,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:28,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1920960537] [2022-03-20 13:20:28,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:28,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:28,506 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:28,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1747164241, now seen corresponding path program 1 times [2022-03-20 13:20:28,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:28,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121652002] [2022-03-20 13:20:28,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:28,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:28,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:28,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:28,580 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:28,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:28,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121652002] [2022-03-20 13:20:28,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121652002] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:28,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704924647] [2022-03-20 13:20:28,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:28,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:28,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:28,586 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:28,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-20 13:20:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:28,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:28,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:28,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:28,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:28,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704924647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:28,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:28,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:29,495 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:29,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1920960537] [2022-03-20 13:20:29,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1920960537] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:29,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:29,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 13:20:29,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359491055] [2022-03-20 13:20:29,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:29,496 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 13:20:29,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:29,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 13:20:29,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 13:20:29,496 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:30,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:30,540 INFO L93 Difference]: Finished difference Result 76 states and 81 transitions. [2022-03-20 13:20:30,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 13:20:30,540 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-03-20 13:20:30,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:30,541 INFO L225 Difference]: With dead ends: 76 [2022-03-20 13:20:30,541 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 13:20:30,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=604, Invalid=4652, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 13:20:30,542 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 61 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1697 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1697 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:30,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 133 Invalid, 1756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1697 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 13:20:30,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 13:20:30,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-20 13:20:30,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:30,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-03-20 13:20:30,547 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 65 [2022-03-20 13:20:30,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:30,547 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-03-20 13:20:30,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:30,547 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-03-20 13:20:30,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-03-20 13:20:30,547 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:30,547 INFO L499 BasicCegarLoop]: trace histogram [28, 26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:30,564 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-03-20 13:20:30,748 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,SelfDestructingSolverStorable27 [2022-03-20 13:20:30,748 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:30,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:30,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1555948741, now seen corresponding path program 26 times [2022-03-20 13:20:30,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:30,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992709756] [2022-03-20 13:20:30,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:30,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:30,812 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:30,813 INFO L85 PathProgramCache]: Analyzing trace with hash 302367919, now seen corresponding path program 1 times [2022-03-20 13:20:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:30,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448719691] [2022-03-20 13:20:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:30,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:30,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:30,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:30,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:30,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448719691] [2022-03-20 13:20:30,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448719691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:30,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862526118] [2022-03-20 13:20:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:30,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:30,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:30,887 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:30,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-20 13:20:30,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:30,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:30,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:31,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:31,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:31,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862526118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:31,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:31,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:31,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:31,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992709756] [2022-03-20 13:20:31,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992709756] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:31,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:31,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-03-20 13:20:31,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759321153] [2022-03-20 13:20:31,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:31,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-20 13:20:31,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:31,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-20 13:20:31,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=1764, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 13:20:31,805 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:32,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:32,922 INFO L93 Difference]: Finished difference Result 78 states and 83 transitions. [2022-03-20 13:20:32,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 13:20:32,922 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-03-20 13:20:32,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:32,923 INFO L225 Difference]: With dead ends: 78 [2022-03-20 13:20:32,923 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 13:20:32,924 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1262 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=623, Invalid=4927, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 13:20:32,924 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 63 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 1865 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:32,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 138 Invalid, 1926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1865 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:20:32,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 13:20:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 13:20:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:32,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-03-20 13:20:32,934 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 67 [2022-03-20 13:20:32,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:32,934 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-03-20 13:20:32,934 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 1.9090909090909092) internal successors, (63), 32 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-03-20 13:20:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 13:20:32,935 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:32,935 INFO L499 BasicCegarLoop]: trace histogram [29, 27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:32,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:33,140 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,SelfDestructingSolverStorable28 [2022-03-20 13:20:33,140 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:33,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:33,141 INFO L85 PathProgramCache]: Analyzing trace with hash -381688234, now seen corresponding path program 27 times [2022-03-20 13:20:33,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:33,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [831800810] [2022-03-20 13:20:33,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:33,225 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:33,225 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:33,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1943067217, now seen corresponding path program 1 times [2022-03-20 13:20:33,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:33,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470745084] [2022-03-20 13:20:33,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:33,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:33,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:33,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:33,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:33,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470745084] [2022-03-20 13:20:33,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470745084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:33,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201775233] [2022-03-20 13:20:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:33,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:33,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:33,343 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:33,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-20 13:20:33,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:33,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:33,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:33,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:33,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:33,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201775233] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:33,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:33,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:34,345 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:34,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [831800810] [2022-03-20 13:20:34,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [831800810] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:34,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:34,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 13:20:34,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337743549] [2022-03-20 13:20:34,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:34,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 13:20:34,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:34,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 13:20:34,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=1848, Unknown=0, NotChecked=0, Total=2162 [2022-03-20 13:20:34,347 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:35,490 INFO L93 Difference]: Finished difference Result 80 states and 85 transitions. [2022-03-20 13:20:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 13:20:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-03-20 13:20:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:35,491 INFO L225 Difference]: With dead ends: 80 [2022-03-20 13:20:35,491 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 13:20:35,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1318 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=642, Invalid=5210, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 13:20:35,493 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:35,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 48 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:20:35,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 13:20:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 13:20:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:35,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-03-20 13:20:35,499 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 69 [2022-03-20 13:20:35,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:35,499 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-03-20 13:20:35,500 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 1.911764705882353) internal successors, (65), 33 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-03-20 13:20:35,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-03-20 13:20:35,500 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:35,500 INFO L499 BasicCegarLoop]: trace histogram [30, 28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:35,516 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-20 13:20:35,700 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:35,701 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:35,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1493739855, now seen corresponding path program 28 times [2022-03-20 13:20:35,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:35,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2115095037] [2022-03-20 13:20:35,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:35,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:35,750 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash 106464943, now seen corresponding path program 1 times [2022-03-20 13:20:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:35,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114317221] [2022-03-20 13:20:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:35,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:35,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114317221] [2022-03-20 13:20:35,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114317221] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:35,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291744584] [2022-03-20 13:20:35,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:35,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:35,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:35,818 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:35,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-20 13:20:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:35,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:35,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:35,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:36,119 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:36,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291744584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:36,120 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:36,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:36,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:36,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2115095037] [2022-03-20 13:20:36,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2115095037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:36,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:36,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-03-20 13:20:36,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051696560] [2022-03-20 13:20:36,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:36,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-20 13:20:36,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:36,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-20 13:20:36,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=1934, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 13:20:36,821 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:37,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:37,984 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2022-03-20 13:20:37,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-20 13:20:37,984 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-03-20 13:20:37,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:37,985 INFO L225 Difference]: With dead ends: 82 [2022-03-20 13:20:37,985 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 13:20:37,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=661, Invalid=5501, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 13:20:37,986 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 67 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 1881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:37,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 33 Invalid, 1881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 13:20:37,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 13:20:37,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-20 13:20:37,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:37,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-03-20 13:20:37,993 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 71 [2022-03-20 13:20:37,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:37,993 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-03-20 13:20:37,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.9142857142857144) internal successors, (67), 34 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:37,994 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-03-20 13:20:37,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-03-20 13:20:37,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:37,994 INFO L499 BasicCegarLoop]: trace histogram [31, 29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:38,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-03-20 13:20:38,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:38,207 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:38,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash -728490932, now seen corresponding path program 29 times [2022-03-20 13:20:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:38,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1406953237] [2022-03-20 13:20:38,225 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:38,266 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:38,267 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:38,267 INFO L85 PathProgramCache]: Analyzing trace with hash -2138970193, now seen corresponding path program 1 times [2022-03-20 13:20:38,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:38,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219913579] [2022-03-20 13:20:38,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:38,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:38,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:38,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:38,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:38,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219913579] [2022-03-20 13:20:38,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219913579] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:38,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725233539] [2022-03-20 13:20:38,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:38,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:38,360 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:38,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-20 13:20:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:38,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:38,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:38,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:38,672 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:38,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725233539] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:38,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:38,672 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:39,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:39,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1406953237] [2022-03-20 13:20:39,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1406953237] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:39,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:39,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 13:20:39,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371445864] [2022-03-20 13:20:39,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:39,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 13:20:39,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:39,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 13:20:39,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=330, Invalid=2022, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 13:20:39,424 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:40,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:40,749 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-03-20 13:20:40,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 13:20:40,750 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-03-20 13:20:40,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:40,750 INFO L225 Difference]: With dead ends: 84 [2022-03-20 13:20:40,750 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 13:20:40,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=680, Invalid=5800, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 13:20:40,751 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 69 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:40,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 98 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 13:20:40,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 13:20:40,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-20 13:20:40,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:40,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-03-20 13:20:40,757 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 73 [2022-03-20 13:20:40,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:40,757 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-03-20 13:20:40,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:40,757 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-03-20 13:20:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 13:20:40,758 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:40,758 INFO L499 BasicCegarLoop]: trace histogram [32, 30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:40,961 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:40,961 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash 236316455, now seen corresponding path program 30 times [2022-03-20 13:20:40,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:40,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [371634788] [2022-03-20 13:20:40,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:41,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:41,033 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:41,033 INFO L85 PathProgramCache]: Analyzing trace with hash -89438033, now seen corresponding path program 1 times [2022-03-20 13:20:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:41,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86209812] [2022-03-20 13:20:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:41,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:41,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86209812] [2022-03-20 13:20:41,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86209812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:41,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762270860] [2022-03-20 13:20:41,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:41,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:41,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:41,100 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:41,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-20 13:20:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:41,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:41,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:41,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:41,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:41,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762270860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:41,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:41,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:42,155 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [371634788] [2022-03-20 13:20:42,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [371634788] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:42,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:42,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-03-20 13:20:42,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269177812] [2022-03-20 13:20:42,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:42,156 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-20 13:20:42,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-20 13:20:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=2112, Unknown=0, NotChecked=0, Total=2450 [2022-03-20 13:20:42,157 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:43,579 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-03-20 13:20:43,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-20 13:20:43,579 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-03-20 13:20:43,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:43,580 INFO L225 Difference]: With dead ends: 86 [2022-03-20 13:20:43,580 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 13:20:43,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1492 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=699, Invalid=6107, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 13:20:43,581 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 71 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 2406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:43,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 158 Invalid, 2406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:20:43,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 13:20:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 13:20:43,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:43,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-03-20 13:20:43,586 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 75 [2022-03-20 13:20:43,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:43,586 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-03-20 13:20:43,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.9189189189189189) internal successors, (71), 36 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:43,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-03-20 13:20:43,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-03-20 13:20:43,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:43,587 INFO L499 BasicCegarLoop]: trace histogram [33, 31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:43,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:43,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-03-20 13:20:43,788 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:43,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:43,788 INFO L85 PathProgramCache]: Analyzing trace with hash -296720574, now seen corresponding path program 31 times [2022-03-20 13:20:43,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:43,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1186863276] [2022-03-20 13:20:43,812 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:43,856 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:43,856 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:43,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1960094127, now seen corresponding path program 1 times [2022-03-20 13:20:43,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:43,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062562502] [2022-03-20 13:20:43,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:43,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:43,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:43,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:43,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062562502] [2022-03-20 13:20:43,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062562502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:43,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372485709] [2022-03-20 13:20:43,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:43,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:43,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:43,925 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:43,931 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-20 13:20:43,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:43,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:43,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:44,063 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:44,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:44,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:44,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372485709] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:44,199 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:44,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:45,010 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:45,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1186863276] [2022-03-20 13:20:45,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1186863276] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:45,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:45,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 13:20:45,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524621079] [2022-03-20 13:20:45,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:45,011 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 13:20:45,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:45,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 13:20:45,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=2204, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 13:20:45,011 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:46,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:46,518 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2022-03-20 13:20:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 13:20:46,518 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-03-20 13:20:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:46,518 INFO L225 Difference]: With dead ends: 88 [2022-03-20 13:20:46,519 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 13:20:46,519 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=718, Invalid=6422, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 13:20:46,520 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 73 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2312 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:46,520 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 88 Invalid, 2383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2312 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:20:46,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 13:20:46,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 13:20:46,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:46,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-03-20 13:20:46,525 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 77 [2022-03-20 13:20:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:46,525 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-03-20 13:20:46,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 1.9210526315789473) internal successors, (73), 37 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-03-20 13:20:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-20 13:20:46,526 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:46,526 INFO L499 BasicCegarLoop]: trace histogram [34, 32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:46,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-20 13:20:46,726 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:46,726 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:46,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:46,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1444197219, now seen corresponding path program 32 times [2022-03-20 13:20:46,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:46,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359361206] [2022-03-20 13:20:46,751 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:46,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:46,795 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:46,795 INFO L85 PathProgramCache]: Analyzing trace with hash -285341009, now seen corresponding path program 1 times [2022-03-20 13:20:46,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:46,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894493357] [2022-03-20 13:20:46,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:46,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:46,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:46,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894493357] [2022-03-20 13:20:46,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894493357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:46,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660149037] [2022-03-20 13:20:46,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:46,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:46,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:46,874 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:46,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-20 13:20:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:46,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:46,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:47,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:47,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:47,186 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:47,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660149037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:47,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:47,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:48,043 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:48,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359361206] [2022-03-20 13:20:48,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359361206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:48,044 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:48,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-03-20 13:20:48,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409746774] [2022-03-20 13:20:48,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:48,044 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-20 13:20:48,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:48,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-20 13:20:48,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2298, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 13:20:48,045 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:49,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:49,573 INFO L93 Difference]: Finished difference Result 90 states and 95 transitions. [2022-03-20 13:20:49,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-20 13:20:49,573 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-03-20 13:20:49,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:49,573 INFO L225 Difference]: With dead ends: 90 [2022-03-20 13:20:49,574 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 13:20:49,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=6745, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:20:49,575 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 75 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2626 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:49,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 143 Invalid, 2699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2626 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 13:20:49,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 13:20:49,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 13:20:49,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:49,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-03-20 13:20:49,582 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 79 [2022-03-20 13:20:49,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:49,582 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-03-20 13:20:49,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 38 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:49,583 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-03-20 13:20:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-03-20 13:20:49,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:49,583 INFO L499 BasicCegarLoop]: trace histogram [35, 33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:49,599 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-03-20 13:20:49,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:49,783 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:49,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:49,784 INFO L85 PathProgramCache]: Analyzing trace with hash -362657992, now seen corresponding path program 33 times [2022-03-20 13:20:49,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:49,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313301730] [2022-03-20 13:20:49,807 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:49,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:49,852 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:49,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1764191151, now seen corresponding path program 1 times [2022-03-20 13:20:49,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:49,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666119852] [2022-03-20 13:20:49,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:49,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:49,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:49,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:49,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:49,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:49,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666119852] [2022-03-20 13:20:49,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666119852] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:49,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819329396] [2022-03-20 13:20:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:49,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:49,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:49,924 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:49,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-20 13:20:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:50,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:50,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:50,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:50,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819329396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:50,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:50,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:20:51,062 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:51,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313301730] [2022-03-20 13:20:51,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313301730] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:51,063 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:51,063 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 13:20:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495913647] [2022-03-20 13:20:51,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:51,063 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 13:20:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 13:20:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=2337, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 13:20:51,064 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 41 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:52,661 INFO L93 Difference]: Finished difference Result 92 states and 97 transitions. [2022-03-20 13:20:52,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 13:20:52,661 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-03-20 13:20:52,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:52,661 INFO L225 Difference]: With dead ends: 92 [2022-03-20 13:20:52,661 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 13:20:52,662 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 55 SyntacticMatches, 4 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=673, Invalid=6983, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 13:20:52,662 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 77 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2721 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 2796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:52,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 123 Invalid, 2796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2721 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 13:20:52,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 13:20:52,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 13:20:52,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:52,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-03-20 13:20:52,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 81 [2022-03-20 13:20:52,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:52,670 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-03-20 13:20:52,670 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 1.925) internal successors, (77), 39 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:52,670 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-03-20 13:20:52,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-03-20 13:20:52,671 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:52,671 INFO L499 BasicCegarLoop]: trace histogram [36, 34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:52,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-20 13:20:52,879 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-20 13:20:52,879 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:52,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:52,879 INFO L85 PathProgramCache]: Analyzing trace with hash -385546477, now seen corresponding path program 34 times [2022-03-20 13:20:52,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:52,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1533467900] [2022-03-20 13:20:52,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:52,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:52,929 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash -481243985, now seen corresponding path program 1 times [2022-03-20 13:20:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:52,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890662284] [2022-03-20 13:20:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:52,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:53,000 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:53,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890662284] [2022-03-20 13:20:53,000 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890662284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:53,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880596208] [2022-03-20 13:20:53,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:53,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:53,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:53,002 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:53,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-20 13:20:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:53,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:53,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:53,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:53,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:53,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880596208] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:53,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:53,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:54,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:54,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1533467900] [2022-03-20 13:20:54,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1533467900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:54,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:54,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-03-20 13:20:54,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260824976] [2022-03-20 13:20:54,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:54,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-20 13:20:54,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:54,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-20 13:20:54,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=2492, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 13:20:54,181 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:55,908 INFO L93 Difference]: Finished difference Result 94 states and 99 transitions. [2022-03-20 13:20:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-20 13:20:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-03-20 13:20:55,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:55,909 INFO L225 Difference]: With dead ends: 94 [2022-03-20 13:20:55,909 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 13:20:55,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=775, Invalid=7415, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 13:20:55,910 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 3029 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 3029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:55,910 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 198 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 3029 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 13:20:55,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 13:20:55,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-20 13:20:55,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:55,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-03-20 13:20:55,916 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 83 [2022-03-20 13:20:55,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:55,916 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-03-20 13:20:55,916 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.9268292682926829) internal successors, (79), 40 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-03-20 13:20:55,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 13:20:55,917 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:55,917 INFO L499 BasicCegarLoop]: trace histogram [37, 35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:55,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-20 13:20:56,117 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-20 13:20:56,117 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:56,118 INFO L85 PathProgramCache]: Analyzing trace with hash -906544082, now seen corresponding path program 35 times [2022-03-20 13:20:56,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:56,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [775165094] [2022-03-20 13:20:56,139 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:56,175 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:56,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:56,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1568288175, now seen corresponding path program 1 times [2022-03-20 13:20:56,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:56,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438900535] [2022-03-20 13:20:56,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:56,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:56,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:56,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:56,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:56,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438900535] [2022-03-20 13:20:56,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438900535] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:56,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059746360] [2022-03-20 13:20:56,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:56,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:56,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:56,247 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:56,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-20 13:20:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:56,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:56,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:56,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:56,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:56,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059746360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:56,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:56,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:20:57,479 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:20:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [775165094] [2022-03-20 13:20:57,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [775165094] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:20:57,479 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:20:57,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 13:20:57,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440046040] [2022-03-20 13:20:57,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:20:57,480 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 13:20:57,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:57,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 13:20:57,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=2592, Unknown=0, NotChecked=0, Total=2970 [2022-03-20 13:20:57,481 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:59,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:20:59,232 INFO L93 Difference]: Finished difference Result 96 states and 101 transitions. [2022-03-20 13:20:59,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 13:20:59,232 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-03-20 13:20:59,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:20:59,233 INFO L225 Difference]: With dead ends: 96 [2022-03-20 13:20:59,233 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 13:20:59,234 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=794, Invalid=7762, Unknown=0, NotChecked=0, Total=8556 [2022-03-20 13:20:59,234 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 81 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3033 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:20:59,235 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 133 Invalid, 3112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3033 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 13:20:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 13:20:59,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-20 13:20:59,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-03-20 13:20:59,243 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 85 [2022-03-20 13:20:59,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:20:59,243 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-03-20 13:20:59,243 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 1.9285714285714286) internal successors, (81), 41 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:20:59,243 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-03-20 13:20:59,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-03-20 13:20:59,244 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:20:59,244 INFO L499 BasicCegarLoop]: trace histogram [38, 36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:20:59,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-20 13:20:59,447 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-20 13:20:59,447 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:20:59,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:20:59,448 INFO L85 PathProgramCache]: Analyzing trace with hash 925931145, now seen corresponding path program 36 times [2022-03-20 13:20:59,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:20:59,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1892976685] [2022-03-20 13:20:59,475 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:59,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:20:59,515 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:20:59,515 INFO L85 PathProgramCache]: Analyzing trace with hash -677146961, now seen corresponding path program 1 times [2022-03-20 13:20:59,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:20:59,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691219628] [2022-03-20 13:20:59,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:59,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:20:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:59,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:20:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:20:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691219628] [2022-03-20 13:20:59,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691219628] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:20:59,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457093424] [2022-03-20 13:20:59,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:20:59,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:20:59,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:20:59,593 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:20:59,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-20 13:20:59,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:20:59,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:20:59,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:20:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:59,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:20:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:20:59,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457093424] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:20:59,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:20:59,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:00,855 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:00,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1892976685] [2022-03-20 13:21:00,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1892976685] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:00,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:00,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-03-20 13:21:00,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668212572] [2022-03-20 13:21:00,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:00,856 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-20 13:21:00,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:00,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-20 13:21:00,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=386, Invalid=2694, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 13:21:00,857 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:02,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:02,746 INFO L93 Difference]: Finished difference Result 98 states and 103 transitions. [2022-03-20 13:21:02,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-20 13:21:02,747 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-03-20 13:21:02,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:02,747 INFO L225 Difference]: With dead ends: 98 [2022-03-20 13:21:02,747 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 13:21:02,748 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=813, Invalid=8117, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 13:21:02,748 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 83 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3250 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:02,749 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 163 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3250 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 13:21:02,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 13:21:02,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 13:21:02,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-03-20 13:21:02,756 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 87 [2022-03-20 13:21:02,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:02,756 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-03-20 13:21:02,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.930232558139535) internal successors, (83), 42 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-03-20 13:21:02,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-03-20 13:21:02,757 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:02,757 INFO L499 BasicCegarLoop]: trace histogram [39, 37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:02,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-03-20 13:21:02,957 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-20 13:21:02,957 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:02,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:02,957 INFO L85 PathProgramCache]: Analyzing trace with hash 998032932, now seen corresponding path program 37 times [2022-03-20 13:21:02,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:02,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1921427415] [2022-03-20 13:21:02,975 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:03,023 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:03,023 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:03,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1372385199, now seen corresponding path program 1 times [2022-03-20 13:21:03,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:03,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62892083] [2022-03-20 13:21:03,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:03,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:03,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:03,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:03,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:03,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:03,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62892083] [2022-03-20 13:21:03,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62892083] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:03,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315458104] [2022-03-20 13:21:03,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:03,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:03,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:03,102 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:03,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-20 13:21:03,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:03,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:03,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:03,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315458104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:03,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:03,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:04,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:04,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1921427415] [2022-03-20 13:21:04,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1921427415] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:04,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:04,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 13:21:04,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701996174] [2022-03-20 13:21:04,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:04,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 13:21:04,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:04,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 13:21:04,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=2798, Unknown=0, NotChecked=0, Total=3192 [2022-03-20 13:21:04,458 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:06,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:06,357 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2022-03-20 13:21:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 13:21:06,357 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-03-20 13:21:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:06,358 INFO L225 Difference]: With dead ends: 100 [2022-03-20 13:21:06,358 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 13:21:06,358 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1933 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=832, Invalid=8480, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 13:21:06,358 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 85 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:06,358 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 43 Invalid, 3224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 13:21:06,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 13:21:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 13:21:06,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-03-20 13:21:06,365 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 89 [2022-03-20 13:21:06,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:06,365 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-03-20 13:21:06,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.9318181818181819) internal successors, (85), 43 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:06,365 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-03-20 13:21:06,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 13:21:06,366 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:06,366 INFO L499 BasicCegarLoop]: trace histogram [40, 38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:06,381 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-20 13:21:06,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-20 13:21:06,566 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:06,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:06,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1568373503, now seen corresponding path program 38 times [2022-03-20 13:21:06,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:06,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497549004] [2022-03-20 13:21:06,585 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:06,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:06,617 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:06,618 INFO L85 PathProgramCache]: Analyzing trace with hash -873049937, now seen corresponding path program 1 times [2022-03-20 13:21:06,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:06,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109964656] [2022-03-20 13:21:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:06,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:06,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:06,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:06,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:06,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109964656] [2022-03-20 13:21:06,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109964656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:06,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559497135] [2022-03-20 13:21:06,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:06,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:06,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:06,686 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:06,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-20 13:21:06,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:06,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:06,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:06,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:06,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:06,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559497135] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:06,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:06,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:08,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:08,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497549004] [2022-03-20 13:21:08,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497549004] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:08,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:08,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-03-20 13:21:08,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987460240] [2022-03-20 13:21:08,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:08,030 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-20 13:21:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:08,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-20 13:21:08,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=2904, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 13:21:08,032 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:10,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:10,117 INFO L93 Difference]: Finished difference Result 102 states and 107 transitions. [2022-03-20 13:21:10,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-20 13:21:10,117 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-03-20 13:21:10,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:10,118 INFO L225 Difference]: With dead ends: 102 [2022-03-20 13:21:10,118 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 13:21:10,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2000 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=851, Invalid=8851, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 13:21:10,119 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 87 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 3580 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:10,119 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 203 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3580 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 13:21:10,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 13:21:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 13:21:10,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:10,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-03-20 13:21:10,126 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 91 [2022-03-20 13:21:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:10,126 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-03-20 13:21:10,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.9333333333333333) internal successors, (87), 44 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-03-20 13:21:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-20 13:21:10,127 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:10,127 INFO L499 BasicCegarLoop]: trace histogram [41, 39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:10,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-20 13:21:10,350 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-20 13:21:10,350 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:10,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:10,350 INFO L85 PathProgramCache]: Analyzing trace with hash -90151654, now seen corresponding path program 39 times [2022-03-20 13:21:10,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:10,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2130157333] [2022-03-20 13:21:10,373 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:10,417 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:10,417 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:10,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1176482223, now seen corresponding path program 1 times [2022-03-20 13:21:10,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:10,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349289963] [2022-03-20 13:21:10,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:10,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:10,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:10,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:10,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349289963] [2022-03-20 13:21:10,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349289963] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:10,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82853344] [2022-03-20 13:21:10,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:10,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:10,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:10,483 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:10,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-20 13:21:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:10,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:10,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:10,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82853344] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:10,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:10,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:11,864 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2130157333] [2022-03-20 13:21:11,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2130157333] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:11,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:11,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 13:21:11,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714485806] [2022-03-20 13:21:11,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:11,865 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 13:21:11,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 13:21:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=3012, Unknown=0, NotChecked=0, Total=3422 [2022-03-20 13:21:11,866 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:13,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:13,960 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2022-03-20 13:21:13,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 13:21:13,960 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-03-20 13:21:13,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:13,961 INFO L225 Difference]: With dead ends: 104 [2022-03-20 13:21:13,961 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 13:21:13,962 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2068 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=870, Invalid=9230, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 13:21:13,962 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 89 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3543 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:13,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 113 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3543 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 13:21:13,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 13:21:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 13:21:13,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:13,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-03-20 13:21:13,968 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 93 [2022-03-20 13:21:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:13,968 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-03-20 13:21:13,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.934782608695652) internal successors, (89), 45 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-03-20 13:21:13,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 13:21:13,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:13,969 INFO L499 BasicCegarLoop]: trace histogram [42, 40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:14,008 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-20 13:21:14,169 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-03-20 13:21:14,170 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:14,170 INFO L85 PathProgramCache]: Analyzing trace with hash -499960715, now seen corresponding path program 40 times [2022-03-20 13:21:14,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:14,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1382165249] [2022-03-20 13:21:14,189 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:14,222 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:14,222 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:14,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1068952913, now seen corresponding path program 1 times [2022-03-20 13:21:14,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:14,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720660375] [2022-03-20 13:21:14,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:14,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:14,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:14,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720660375] [2022-03-20 13:21:14,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720660375] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:14,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676064924] [2022-03-20 13:21:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:14,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:14,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:14,301 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:14,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-20 13:21:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:14,470 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:14,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:14,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676064924] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:14,623 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:14,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:15,766 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:15,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1382165249] [2022-03-20 13:21:15,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1382165249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:15,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:15,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-03-20 13:21:15,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417300133] [2022-03-20 13:21:15,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:15,767 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-03-20 13:21:15,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-03-20 13:21:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=3122, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 13:21:15,768 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:17,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:17,905 INFO L93 Difference]: Finished difference Result 106 states and 111 transitions. [2022-03-20 13:21:17,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-20 13:21:17,906 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-03-20 13:21:17,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:17,906 INFO L225 Difference]: With dead ends: 106 [2022-03-20 13:21:17,906 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 13:21:17,907 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2137 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=889, Invalid=9617, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 13:21:17,908 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 91 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 3630 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:17,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 43 Invalid, 3719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3630 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 13:21:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 13:21:17,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-20 13:21:17,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:17,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-03-20 13:21:17,917 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 95 [2022-03-20 13:21:17,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:17,918 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-03-20 13:21:17,918 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.9361702127659575) internal successors, (91), 46 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:17,918 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-03-20 13:21:17,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-20 13:21:17,919 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:17,919 INFO L499 BasicCegarLoop]: trace histogram [43, 41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:17,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-20 13:21:18,127 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-20 13:21:18,127 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash 810522896, now seen corresponding path program 41 times [2022-03-20 13:21:18,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:18,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1412043877] [2022-03-20 13:21:18,152 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:18,184 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:18,184 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:18,184 INFO L85 PathProgramCache]: Analyzing trace with hash 980579247, now seen corresponding path program 1 times [2022-03-20 13:21:18,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:18,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075597503] [2022-03-20 13:21:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:18,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:18,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:18,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:18,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:18,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:18,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:18,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075597503] [2022-03-20 13:21:18,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075597503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:18,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502428033] [2022-03-20 13:21:18,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:18,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:18,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:18,251 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:18,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-20 13:21:18,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:18,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:18,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:18,545 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:18,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502428033] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:18,545 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:18,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:19,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:19,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1412043877] [2022-03-20 13:21:19,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1412043877] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:19,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:19,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-03-20 13:21:19,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83661363] [2022-03-20 13:21:19,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:19,715 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-03-20 13:21:19,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:19,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-03-20 13:21:19,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3234, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 13:21:19,716 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 49 states, 48 states have (on average 1.9375) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:21,991 INFO L93 Difference]: Finished difference Result 108 states and 113 transitions. [2022-03-20 13:21:21,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 13:21:21,992 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 1.9375) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-03-20 13:21:21,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:21,992 INFO L225 Difference]: With dead ends: 108 [2022-03-20 13:21:21,992 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 13:21:21,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2207 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=908, Invalid=10012, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 13:21:21,994 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 93 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3987 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:21,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 163 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3987 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 13:21:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 13:21:22,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 13:21:22,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:22,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-03-20 13:21:22,003 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 97 [2022-03-20 13:21:22,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:22,003 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-03-20 13:21:22,003 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 1.9375) internal successors, (93), 47 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-03-20 13:21:22,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-03-20 13:21:22,004 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:22,004 INFO L499 BasicCegarLoop]: trace histogram [44, 42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:22,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-20 13:21:22,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:22,207 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:22,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:22,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1759855339, now seen corresponding path program 42 times [2022-03-20 13:21:22,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:22,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1857091356] [2022-03-20 13:21:22,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:22,269 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:22,269 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:22,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1264855889, now seen corresponding path program 1 times [2022-03-20 13:21:22,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:22,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647126822] [2022-03-20 13:21:22,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:22,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:22,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:22,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:22,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647126822] [2022-03-20 13:21:22,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647126822] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:22,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640044338] [2022-03-20 13:21:22,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:22,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:22,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:22,335 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:22,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-20 13:21:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:22,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:22,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:22,619 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640044338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:22,619 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:22,619 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:23,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:23,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1857091356] [2022-03-20 13:21:23,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1857091356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:23,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:23,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 13:21:23,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921696908] [2022-03-20 13:21:23,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:23,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 13:21:23,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:23,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 13:21:23,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=3348, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 13:21:23,844 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:26,250 INFO L93 Difference]: Finished difference Result 110 states and 115 transitions. [2022-03-20 13:21:26,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-03-20 13:21:26,250 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-03-20 13:21:26,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:26,251 INFO L225 Difference]: With dead ends: 110 [2022-03-20 13:21:26,251 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 13:21:26,252 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=927, Invalid=10415, Unknown=0, NotChecked=0, Total=11342 [2022-03-20 13:21:26,252 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 95 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4174 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 4267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:26,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 133 Invalid, 4267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4174 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 13:21:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 13:21:26,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 13:21:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:26,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-03-20 13:21:26,262 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 99 [2022-03-20 13:21:26,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:26,262 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-03-20 13:21:26,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.9387755102040816) internal successors, (95), 48 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:26,262 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-03-20 13:21:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-03-20 13:21:26,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:26,263 INFO L499 BasicCegarLoop]: trace histogram [45, 43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:26,284 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-20 13:21:26,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:26,479 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:26,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:26,480 INFO L85 PathProgramCache]: Analyzing trace with hash -759700986, now seen corresponding path program 43 times [2022-03-20 13:21:26,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:26,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [895989183] [2022-03-20 13:21:26,505 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:26,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:26,549 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash 784676271, now seen corresponding path program 1 times [2022-03-20 13:21:26,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:26,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423967928] [2022-03-20 13:21:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:26,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:26,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:26,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:26,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423967928] [2022-03-20 13:21:26,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423967928] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:26,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996016574] [2022-03-20 13:21:26,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:26,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:26,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:26,607 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:26,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-20 13:21:26,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:26,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:26,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:26,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:26,978 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996016574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:26,978 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:26,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:28,257 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:28,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [895989183] [2022-03-20 13:21:28,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [895989183] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:28,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:28,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 13:21:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066535294] [2022-03-20 13:21:28,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:28,258 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 13:21:28,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:28,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 13:21:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=3464, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 13:21:28,259 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 51 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:30,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:30,862 INFO L93 Difference]: Finished difference Result 112 states and 117 transitions. [2022-03-20 13:21:30,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 13:21:30,862 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-03-20 13:21:30,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:30,863 INFO L225 Difference]: With dead ends: 112 [2022-03-20 13:21:30,863 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 13:21:30,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=946, Invalid=10826, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 13:21:30,864 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 97 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 4595 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 4690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:30,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 243 Invalid, 4690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4595 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 13:21:30,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 13:21:30,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-20 13:21:30,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:30,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-03-20 13:21:30,874 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 101 [2022-03-20 13:21:30,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:30,874 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-03-20 13:21:30,874 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.94) internal successors, (97), 49 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-03-20 13:21:30,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-03-20 13:21:30,875 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:30,875 INFO L499 BasicCegarLoop]: trace histogram [46, 44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:30,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-20 13:21:31,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-03-20 13:21:31,076 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:31,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:31,076 INFO L85 PathProgramCache]: Analyzing trace with hash 308225633, now seen corresponding path program 44 times [2022-03-20 13:21:31,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:31,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1324544188] [2022-03-20 13:21:31,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:31,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:31,138 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:31,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1460758865, now seen corresponding path program 1 times [2022-03-20 13:21:31,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:31,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666877179] [2022-03-20 13:21:31,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:31,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:31,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:31,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:31,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:31,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666877179] [2022-03-20 13:21:31,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666877179] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:31,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989857407] [2022-03-20 13:21:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:31,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:31,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:31,212 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:31,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-20 13:21:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:31,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:31,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:31,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989857407] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:31,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:31,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:32,817 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:32,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1324544188] [2022-03-20 13:21:32,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1324544188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:32,817 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:32,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-03-20 13:21:32,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274022554] [2022-03-20 13:21:32,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:32,818 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-03-20 13:21:32,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:32,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-03-20 13:21:32,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=3582, Unknown=0, NotChecked=0, Total=4032 [2022-03-20 13:21:32,819 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:35,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:35,539 INFO L93 Difference]: Finished difference Result 114 states and 119 transitions. [2022-03-20 13:21:35,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 13:21:35,540 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-03-20 13:21:35,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:35,540 INFO L225 Difference]: With dead ends: 114 [2022-03-20 13:21:35,541 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 13:21:35,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2423 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=965, Invalid=11245, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 13:21:35,542 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 99 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4584 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 4681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:35,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 193 Invalid, 4681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4584 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 13:21:35,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 13:21:35,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-20 13:21:35,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:35,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-03-20 13:21:35,552 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 103 [2022-03-20 13:21:35,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:35,552 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-03-20 13:21:35,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 50 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:35,552 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-03-20 13:21:35,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 13:21:35,552 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:35,553 INFO L499 BasicCegarLoop]: trace histogram [47, 45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:35,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-03-20 13:21:35,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-20 13:21:35,755 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:35,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash 88522748, now seen corresponding path program 45 times [2022-03-20 13:21:35,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:35,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [697583259] [2022-03-20 13:21:35,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:35,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:35,821 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:35,822 INFO L85 PathProgramCache]: Analyzing trace with hash 588773295, now seen corresponding path program 1 times [2022-03-20 13:21:35,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:35,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10625401] [2022-03-20 13:21:35,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:35,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:35,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:35,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:35,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:35,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:35,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10625401] [2022-03-20 13:21:35,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10625401] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:35,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98566527] [2022-03-20 13:21:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:35,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:35,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:35,887 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:35,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-20 13:21:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:35,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:35,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:36,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:36,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:36,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98566527] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:36,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:36,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:37,516 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:37,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [697583259] [2022-03-20 13:21:37,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [697583259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:37,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:37,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 13:21:37,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479875134] [2022-03-20 13:21:37,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:37,517 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 13:21:37,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 13:21:37,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=3702, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 13:21:37,518 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:40,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:40,242 INFO L93 Difference]: Finished difference Result 116 states and 121 transitions. [2022-03-20 13:21:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 13:21:40,242 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-03-20 13:21:40,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:40,243 INFO L225 Difference]: With dead ends: 116 [2022-03-20 13:21:40,243 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 13:21:40,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2497 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=984, Invalid=11672, Unknown=0, NotChecked=0, Total=12656 [2022-03-20 13:21:40,244 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 101 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4725 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 4824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4725 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:40,244 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 173 Invalid, 4824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4725 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 13:21:40,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 13:21:40,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 13:21:40,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 104 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-03-20 13:21:40,252 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 105 [2022-03-20 13:21:40,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:40,252 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-03-20 13:21:40,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.9423076923076923) internal successors, (101), 51 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:40,252 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-03-20 13:21:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 13:21:40,253 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:40,253 INFO L499 BasicCegarLoop]: trace histogram [48, 46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:40,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-03-20 13:21:40,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-20 13:21:40,476 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:40,476 INFO L85 PathProgramCache]: Analyzing trace with hash -592552233, now seen corresponding path program 46 times [2022-03-20 13:21:40,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:40,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282683993] [2022-03-20 13:21:40,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:40,551 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:40,551 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:40,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1656661841, now seen corresponding path program 1 times [2022-03-20 13:21:40,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:40,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252536582] [2022-03-20 13:21:40,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:40,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:40,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:40,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:40,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:40,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252536582] [2022-03-20 13:21:40,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252536582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:40,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22393901] [2022-03-20 13:21:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:40,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:40,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:40,628 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:40,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-20 13:21:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:40,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:40,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:40,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:40,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:40,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [22393901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:40,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:40,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:21:42,351 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:42,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282683993] [2022-03-20 13:21:42,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282683993] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:42,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:42,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-03-20 13:21:42,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302232469] [2022-03-20 13:21:42,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:42,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-03-20 13:21:42,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:42,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-03-20 13:21:42,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3754, Unknown=0, NotChecked=0, Total=4160 [2022-03-20 13:21:42,353 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:45,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:45,168 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-03-20 13:21:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-03-20 13:21:45,168 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-03-20 13:21:45,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:45,169 INFO L225 Difference]: With dead ends: 118 [2022-03-20 13:21:45,169 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 13:21:45,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 68 SyntacticMatches, 4 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2465 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=894, Invalid=11988, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 13:21:45,170 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 103 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 4969 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 5070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 4969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:45,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 158 Invalid, 5070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 4969 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 13:21:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 13:21:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 13:21:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 106 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-03-20 13:21:45,181 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 107 [2022-03-20 13:21:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:45,181 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-03-20 13:21:45,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.9433962264150944) internal successors, (103), 52 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:45,181 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-03-20 13:21:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-03-20 13:21:45,182 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:45,182 INFO L499 BasicCegarLoop]: trace histogram [49, 47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:45,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-03-20 13:21:45,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:45,405 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:45,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:45,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2024387314, now seen corresponding path program 47 times [2022-03-20 13:21:45,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:45,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298762453] [2022-03-20 13:21:45,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:45,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:45,479 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:45,479 INFO L85 PathProgramCache]: Analyzing trace with hash 392870319, now seen corresponding path program 1 times [2022-03-20 13:21:45,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:45,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484696041] [2022-03-20 13:21:45,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:45,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:45,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:45,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:45,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:45,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484696041] [2022-03-20 13:21:45,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484696041] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:45,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211188400] [2022-03-20 13:21:45,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:45,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:45,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:45,552 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:45,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-20 13:21:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:45,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:45,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:45,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [211188400] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:45,858 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:45,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:47,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:47,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298762453] [2022-03-20 13:21:47,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298762453] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:47,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:47,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 13:21:47,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646027025] [2022-03-20 13:21:47,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:47,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 13:21:47,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 13:21:47,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=3948, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 13:21:47,305 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:50,245 INFO L93 Difference]: Finished difference Result 120 states and 125 transitions. [2022-03-20 13:21:50,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 13:21:50,245 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-03-20 13:21:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:50,246 INFO L225 Difference]: With dead ends: 120 [2022-03-20 13:21:50,246 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 13:21:50,247 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1022, Invalid=12550, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 13:21:50,247 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 105 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5184 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 5184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:50,247 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 208 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 5184 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 13:21:50,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 13:21:50,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 13:21:50,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.037037037037037) internal successors, (112), 108 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:50,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-03-20 13:21:50,258 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 109 [2022-03-20 13:21:50,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:50,258 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-03-20 13:21:50,258 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 54 states have (on average 1.9444444444444444) internal successors, (105), 53 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:50,258 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-03-20 13:21:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-03-20 13:21:50,258 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:50,259 INFO L499 BasicCegarLoop]: trace histogram [50, 48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:50,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-03-20 13:21:50,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-20 13:21:50,479 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:50,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:50,480 INFO L85 PathProgramCache]: Analyzing trace with hash 52456525, now seen corresponding path program 48 times [2022-03-20 13:21:50,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:50,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783316820] [2022-03-20 13:21:50,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:50,549 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:50,549 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1852564817, now seen corresponding path program 1 times [2022-03-20 13:21:50,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:50,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121366292] [2022-03-20 13:21:50,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:50,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:50,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:50,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:50,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121366292] [2022-03-20 13:21:50,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121366292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183303037] [2022-03-20 13:21:50,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:50,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:50,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:50,628 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:50,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-20 13:21:50,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:50,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:50,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:50,773 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:50,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:51,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183303037] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:51,048 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:51,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:21:52,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:52,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783316820] [2022-03-20 13:21:52,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783316820] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:52,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:52,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-03-20 13:21:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487686244] [2022-03-20 13:21:52,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:52,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-03-20 13:21:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-03-20 13:21:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=4155, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 13:21:52,558 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 56 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:55,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:21:55,666 INFO L93 Difference]: Finished difference Result 122 states and 127 transitions. [2022-03-20 13:21:55,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-20 13:21:55,667 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-03-20 13:21:55,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:21:55,667 INFO L225 Difference]: With dead ends: 122 [2022-03-20 13:21:55,668 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 13:21:55,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2830 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1145, Invalid=13135, Unknown=0, NotChecked=0, Total=14280 [2022-03-20 13:21:55,669 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 107 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 5616 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:21:55,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 273 Invalid, 5721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5616 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 13:21:55,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 13:21:55,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 13:21:55,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-03-20 13:21:55,679 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 111 [2022-03-20 13:21:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:21:55,679 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-03-20 13:21:55,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.9454545454545455) internal successors, (107), 54 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:21:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-03-20 13:21:55,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-20 13:21:55,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:21:55,680 INFO L499 BasicCegarLoop]: trace histogram [51, 49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:21:55,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-20 13:21:55,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:55,899 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:21:55,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:21:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash -892454168, now seen corresponding path program 49 times [2022-03-20 13:21:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:55,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [16437085] [2022-03-20 13:21:55,917 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:55,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:21:55,966 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:21:55,966 INFO L85 PathProgramCache]: Analyzing trace with hash 196967343, now seen corresponding path program 1 times [2022-03-20 13:21:55,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:21:55,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106827315] [2022-03-20 13:21:55,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:55,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:21:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:56,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:21:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:56,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:56,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:21:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106827315] [2022-03-20 13:21:56,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106827315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:21:56,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379398511] [2022-03-20 13:21:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:21:56,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:21:56,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:21:56,027 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:21:56,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-20 13:21:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:21:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:21:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:21:56,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:56,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:21:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:21:56,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379398511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:21:56,310 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:21:56,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:21:57,884 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:21:57,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [16437085] [2022-03-20 13:21:57,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [16437085] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:21:57,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:21:57,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 13:21:57,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879531687] [2022-03-20 13:21:57,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:21:57,885 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 13:21:57,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:21:57,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 13:21:57,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=4202, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 13:21:57,886 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:00,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:00,981 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2022-03-20 13:22:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 13:22:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-03-20 13:22:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:00,982 INFO L225 Difference]: With dead ends: 124 [2022-03-20 13:22:00,982 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 13:22:00,983 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1060, Invalid=13460, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 13:22:00,983 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 109 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 5544 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 5651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:00,985 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 148 Invalid, 5651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5544 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 13:22:00,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 13:22:00,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-20 13:22:00,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 112 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:00,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-03-20 13:22:00,993 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 113 [2022-03-20 13:22:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:00,993 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-03-20 13:22:00,993 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 1.9464285714285714) internal successors, (109), 55 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-03-20 13:22:00,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-03-20 13:22:00,994 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:00,994 INFO L499 BasicCegarLoop]: trace histogram [52, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:01,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-20 13:22:01,194 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-03-20 13:22:01,194 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:01,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1581436611, now seen corresponding path program 50 times [2022-03-20 13:22:01,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:01,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1193700894] [2022-03-20 13:22:01,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:01,258 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:01,258 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:01,259 INFO L85 PathProgramCache]: Analyzing trace with hash -2048467793, now seen corresponding path program 1 times [2022-03-20 13:22:01,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880246595] [2022-03-20 13:22:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:01,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:01,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:01,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:01,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:01,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880246595] [2022-03-20 13:22:01,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880246595] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:01,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069121640] [2022-03-20 13:22:01,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:01,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:01,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:01,357 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:01,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-20 13:22:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:01,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:01,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:01,500 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:01,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069121640] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:01,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:01,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:03,231 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:03,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1193700894] [2022-03-20 13:22:03,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1193700894] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:03,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:03,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-03-20 13:22:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312778089] [2022-03-20 13:22:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:03,232 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-03-20 13:22:03,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:03,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-03-20 13:22:03,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=4332, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 13:22:03,232 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 58 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:06,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:06,491 INFO L93 Difference]: Finished difference Result 126 states and 131 transitions. [2022-03-20 13:22:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-03-20 13:22:06,491 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-03-20 13:22:06,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:06,491 INFO L225 Difference]: With dead ends: 126 [2022-03-20 13:22:06,491 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 13:22:06,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2882 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1079, Invalid=13927, Unknown=0, NotChecked=0, Total=15006 [2022-03-20 13:22:06,493 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 111 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 5883 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 5992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:06,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 208 Invalid, 5992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5883 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-20 13:22:06,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 13:22:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 13:22:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 114 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:06,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-03-20 13:22:06,503 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 115 [2022-03-20 13:22:06,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:06,503 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-03-20 13:22:06,503 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.9473684210526316) internal successors, (111), 56 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-03-20 13:22:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-03-20 13:22:06,504 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:06,504 INFO L499 BasicCegarLoop]: trace histogram [53, 51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:06,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-03-20 13:22:06,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-20 13:22:06,717 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:06,718 INFO L85 PathProgramCache]: Analyzing trace with hash -421406754, now seen corresponding path program 51 times [2022-03-20 13:22:06,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:06,718 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1579217131] [2022-03-20 13:22:06,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:06,781 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:06,781 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:06,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1064367, now seen corresponding path program 1 times [2022-03-20 13:22:06,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:06,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693495234] [2022-03-20 13:22:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:06,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:06,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:06,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:06,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:06,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:06,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693495234] [2022-03-20 13:22:06,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693495234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:06,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576983520] [2022-03-20 13:22:06,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:06,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:06,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:06,865 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:06,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-20 13:22:06,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:06,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:06,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:07,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:07,132 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576983520] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:07,132 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:07,132 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:22:08,767 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1579217131] [2022-03-20 13:22:08,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1579217131] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:08,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:08,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 13:22:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771133532] [2022-03-20 13:22:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:08,768 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 13:22:08,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:08,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 13:22:08,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=4389, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 13:22:08,769 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 59 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:12,114 INFO L93 Difference]: Finished difference Result 128 states and 133 transitions. [2022-03-20 13:22:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 13:22:12,115 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-03-20 13:22:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:12,116 INFO L225 Difference]: With dead ends: 128 [2022-03-20 13:22:12,116 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 13:22:12,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2845 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=979, Invalid=14273, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 13:22:12,117 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 113 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 6029 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 6140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 6029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:12,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 223 Invalid, 6140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 6029 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 13:22:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 13:22:12,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 13:22:12,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 116 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:12,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-03-20 13:22:12,128 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 117 [2022-03-20 13:22:12,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:12,128 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-03-20 13:22:12,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 1.9482758620689655) internal successors, (113), 57 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:12,128 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-03-20 13:22:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-03-20 13:22:12,129 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:12,129 INFO L499 BasicCegarLoop]: trace histogram [54, 52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:12,149 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-03-20 13:22:12,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:12,343 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:12,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1008531911, now seen corresponding path program 52 times [2022-03-20 13:22:12,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:12,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [508810495] [2022-03-20 13:22:12,368 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:12,407 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:12,407 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:12,408 INFO L85 PathProgramCache]: Analyzing trace with hash 2050596527, now seen corresponding path program 1 times [2022-03-20 13:22:12,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:12,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756017176] [2022-03-20 13:22:12,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:12,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:12,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:12,475 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:12,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:12,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756017176] [2022-03-20 13:22:12,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756017176] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:12,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265088179] [2022-03-20 13:22:12,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:12,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:12,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:12,477 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:12,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-20 13:22:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:12,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:12,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:12,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:12,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:12,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265088179] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:12,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:12,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:14,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:14,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [508810495] [2022-03-20 13:22:14,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [508810495] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:14,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:14,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-03-20 13:22:14,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190515054] [2022-03-20 13:22:14,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:14,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-03-20 13:22:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:14,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-03-20 13:22:14,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=514, Invalid=4598, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:22:14,453 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:17,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:17,925 INFO L93 Difference]: Finished difference Result 130 states and 135 transitions. [2022-03-20 13:22:17,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-20 13:22:17,925 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-03-20 13:22:17,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:17,926 INFO L225 Difference]: With dead ends: 130 [2022-03-20 13:22:17,926 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 13:22:17,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1117, Invalid=14885, Unknown=0, NotChecked=0, Total=16002 [2022-03-20 13:22:17,927 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 115 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 6275 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 6388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 6275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:17,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 238 Invalid, 6388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 6275 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 13:22:17,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 13:22:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-20 13:22:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-03-20 13:22:17,939 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 119 [2022-03-20 13:22:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:17,939 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-03-20 13:22:17,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.9491525423728813) internal successors, (115), 58 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-03-20 13:22:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-20 13:22:17,940 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:17,940 INFO L499 BasicCegarLoop]: trace histogram [55, 53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:17,963 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-03-20 13:22:18,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-20 13:22:18,163 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:18,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:18,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1699875284, now seen corresponding path program 53 times [2022-03-20 13:22:18,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:18,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889858609] [2022-03-20 13:22:18,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:18,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:18,241 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:18,242 INFO L85 PathProgramCache]: Analyzing trace with hash -194838609, now seen corresponding path program 1 times [2022-03-20 13:22:18,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:18,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970248973] [2022-03-20 13:22:18,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:18,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:18,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:18,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:18,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970248973] [2022-03-20 13:22:18,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970248973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:18,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361428190] [2022-03-20 13:22:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:18,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:18,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:18,316 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:18,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-20 13:22:18,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:18,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:18,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:18,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:18,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:18,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:18,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361428190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:18,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:18,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:22:20,369 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:20,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889858609] [2022-03-20 13:22:20,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889858609] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:20,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:20,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 13:22:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154561003] [2022-03-20 13:22:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:20,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 13:22:20,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 13:22:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=455, Invalid=4657, Unknown=0, NotChecked=0, Total=5112 [2022-03-20 13:22:20,370 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 61 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:23,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:23,927 INFO L93 Difference]: Finished difference Result 132 states and 137 transitions. [2022-03-20 13:22:23,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 13:22:23,927 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-03-20 13:22:23,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:23,928 INFO L225 Difference]: With dead ends: 132 [2022-03-20 13:22:23,928 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 13:22:23,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 75 SyntacticMatches, 4 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1013, Invalid=15243, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 13:22:23,929 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 117 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 6426 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 6541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:23,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 208 Invalid, 6541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 6426 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 13:22:23,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 13:22:23,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-20 13:22:23,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-03-20 13:22:23,936 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 121 [2022-03-20 13:22:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:23,936 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-03-20 13:22:23,936 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 60 states have (on average 1.95) internal successors, (117), 59 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:23,937 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-03-20 13:22:23,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-03-20 13:22:23,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:23,937 INFO L499 BasicCegarLoop]: trace histogram [56, 54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:23,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-03-20 13:22:24,137 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-03-20 13:22:24,137 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:24,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1729008303, now seen corresponding path program 54 times [2022-03-20 13:22:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:24,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843883751] [2022-03-20 13:22:24,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:24,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:24,198 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1854693551, now seen corresponding path program 1 times [2022-03-20 13:22:24,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:24,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085625906] [2022-03-20 13:22:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:24,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:24,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:24,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:24,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:24,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:24,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085625906] [2022-03-20 13:22:24,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085625906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:24,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831342639] [2022-03-20 13:22:24,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:24,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:24,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:24,277 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:24,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-20 13:22:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:24,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:24,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:24,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831342639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:24,592 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:24,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:26,359 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:26,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843883751] [2022-03-20 13:22:26,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843883751] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:26,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:26,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-03-20 13:22:26,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325987274] [2022-03-20 13:22:26,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:26,360 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-03-20 13:22:26,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:26,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-03-20 13:22:26,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=4872, Unknown=0, NotChecked=0, Total=5402 [2022-03-20 13:22:26,361 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:30,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:30,259 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-03-20 13:22:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-03-20 13:22:30,259 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-03-20 13:22:30,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:30,260 INFO L225 Difference]: With dead ends: 134 [2022-03-20 13:22:30,260 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 13:22:30,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1155, Invalid=15875, Unknown=0, NotChecked=0, Total=17030 [2022-03-20 13:22:30,261 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 119 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 6916 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 7033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 6916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:30,261 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 283 Invalid, 7033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 6916 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 13:22:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 13:22:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 13:22:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:30,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-03-20 13:22:30,269 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 123 [2022-03-20 13:22:30,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:30,269 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-03-20 13:22:30,269 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.9508196721311475) internal successors, (119), 60 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-03-20 13:22:30,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-03-20 13:22:30,270 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:30,270 INFO L499 BasicCegarLoop]: trace histogram [57, 55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:30,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-03-20 13:22:30,470 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:30,470 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:30,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:30,471 INFO L85 PathProgramCache]: Analyzing trace with hash -338931510, now seen corresponding path program 55 times [2022-03-20 13:22:30,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:30,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235673499] [2022-03-20 13:22:30,494 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:30,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:30,537 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:30,537 INFO L85 PathProgramCache]: Analyzing trace with hash -390741585, now seen corresponding path program 1 times [2022-03-20 13:22:30,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:30,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392710934] [2022-03-20 13:22:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:30,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:30,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:30,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:30,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:30,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392710934] [2022-03-20 13:22:30,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392710934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:30,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566358042] [2022-03-20 13:22:30,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:30,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:30,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:30,596 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:30,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-20 13:22:30,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:30,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:30,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:30,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:30,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566358042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:30,899 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:30,899 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:32,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:32,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235673499] [2022-03-20 13:22:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235673499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:32,762 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:32,762 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 13:22:32,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009610126] [2022-03-20 13:22:32,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:32,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 13:22:32,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:32,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 13:22:32,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=5012, Unknown=0, NotChecked=0, Total=5550 [2022-03-20 13:22:32,763 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 63 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:36,572 INFO L93 Difference]: Finished difference Result 136 states and 141 transitions. [2022-03-20 13:22:36,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 13:22:36,572 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-03-20 13:22:36,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:36,573 INFO L225 Difference]: With dead ends: 136 [2022-03-20 13:22:36,573 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 13:22:36,574 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3292 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1174, Invalid=16382, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 13:22:36,574 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 121 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 6674 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 6793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:36,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 118 Invalid, 6793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6674 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 13:22:36,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 13:22:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 13:22:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.032258064516129) internal successors, (128), 124 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:36,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-03-20 13:22:36,582 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 125 [2022-03-20 13:22:36,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:36,582 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-03-20 13:22:36,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 1.9516129032258065) internal successors, (121), 61 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:36,582 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-03-20 13:22:36,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-20 13:22:36,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:36,583 INFO L499 BasicCegarLoop]: trace histogram [58, 56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:36,598 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-20 13:22:36,783 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:36,783 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:36,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:36,783 INFO L85 PathProgramCache]: Analyzing trace with hash 940766245, now seen corresponding path program 56 times [2022-03-20 13:22:36,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:36,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1115820188] [2022-03-20 13:22:36,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:36,848 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:36,848 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:36,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1658790575, now seen corresponding path program 1 times [2022-03-20 13:22:36,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:36,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115440860] [2022-03-20 13:22:36,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:36,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:36,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:36,918 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:36,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115440860] [2022-03-20 13:22:36,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115440860] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:36,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568269310] [2022-03-20 13:22:36,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:36,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:36,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:36,924 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:36,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-20 13:22:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:37,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:37,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:37,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568269310] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:37,216 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:37,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:39,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:39,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1115820188] [2022-03-20 13:22:39,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1115820188] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:39,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:39,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-03-20 13:22:39,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946364634] [2022-03-20 13:22:39,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:39,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-03-20 13:22:39,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:39,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-03-20 13:22:39,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=5154, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 13:22:39,142 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 64 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:43,094 INFO L93 Difference]: Finished difference Result 138 states and 143 transitions. [2022-03-20 13:22:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-03-20 13:22:43,095 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-03-20 13:22:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:43,095 INFO L225 Difference]: With dead ends: 138 [2022-03-20 13:22:43,095 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 13:22:43,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3377 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1193, Invalid=16897, Unknown=0, NotChecked=0, Total=18090 [2022-03-20 13:22:43,097 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 123 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 7222 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 7343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 7222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:43,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 263 Invalid, 7343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 7222 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-03-20 13:22:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 13:22:43,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 13:22:43,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 126 states have internal predecessors, (130), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:43,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-03-20 13:22:43,105 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 127 [2022-03-20 13:22:43,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:43,106 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-03-20 13:22:43,106 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 62 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:43,106 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-03-20 13:22:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 13:22:43,106 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:43,106 INFO L499 BasicCegarLoop]: trace histogram [59, 57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:43,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-20 13:22:43,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:43,307 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:43,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:43,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1925305152, now seen corresponding path program 57 times [2022-03-20 13:22:43,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:43,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089754869] [2022-03-20 13:22:43,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:43,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:43,356 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:43,356 INFO L85 PathProgramCache]: Analyzing trace with hash -586644561, now seen corresponding path program 1 times [2022-03-20 13:22:43,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:43,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678665660] [2022-03-20 13:22:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:43,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:43,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:43,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:43,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678665660] [2022-03-20 13:22:43,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678665660] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:43,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646687540] [2022-03-20 13:22:43,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:43,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:43,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:43,432 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:43,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-20 13:22:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:43,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:43,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:43,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:43,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:43,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646687540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:43,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:43,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:45,644 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:45,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089754869] [2022-03-20 13:22:45,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089754869] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:45,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:45,644 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 13:22:45,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573212524] [2022-03-20 13:22:45,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:45,645 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 13:22:45,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:45,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 13:22:45,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=554, Invalid=5298, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 13:22:45,646 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 65 states, 64 states have (on average 1.953125) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:49,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:49,576 INFO L93 Difference]: Finished difference Result 140 states and 145 transitions. [2022-03-20 13:22:49,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 13:22:49,576 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 64 states have (on average 1.953125) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-03-20 13:22:49,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:49,577 INFO L225 Difference]: With dead ends: 140 [2022-03-20 13:22:49,577 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 13:22:49,578 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3463 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1212, Invalid=17420, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 13:22:49,578 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 125 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6960 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 7083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 6960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:49,578 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 38 Invalid, 7083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 6960 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 13:22:49,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 13:22:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 13:22:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.03125) internal successors, (132), 128 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-03-20 13:22:49,587 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 129 [2022-03-20 13:22:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:49,587 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-03-20 13:22:49,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 64 states have (on average 1.953125) internal successors, (125), 63 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-03-20 13:22:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-03-20 13:22:49,587 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:49,587 INFO L499 BasicCegarLoop]: trace histogram [60, 58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:49,603 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-20 13:22:49,788 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-20 13:22:49,788 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1149086363, now seen corresponding path program 58 times [2022-03-20 13:22:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:49,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1409032777] [2022-03-20 13:22:49,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:49,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:49,847 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:49,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1462887599, now seen corresponding path program 1 times [2022-03-20 13:22:49,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:49,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868322226] [2022-03-20 13:22:49,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:49,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:49,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:49,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:49,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:49,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868322226] [2022-03-20 13:22:49,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868322226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:49,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559974875] [2022-03-20 13:22:49,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:49,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:49,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:49,915 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:49,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-20 13:22:49,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:49,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:50,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:50,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559974875] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:50,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:50,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:52,249 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:52,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1409032777] [2022-03-20 13:22:52,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1409032777] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:52,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:52,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-03-20 13:22:52,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754752732] [2022-03-20 13:22:52,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:52,250 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-03-20 13:22:52,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:52,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-03-20 13:22:52,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=562, Invalid=5444, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 13:22:52,251 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:56,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:22:56,436 INFO L93 Difference]: Finished difference Result 142 states and 147 transitions. [2022-03-20 13:22:56,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-03-20 13:22:56,436 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-03-20 13:22:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:22:56,437 INFO L225 Difference]: With dead ends: 142 [2022-03-20 13:22:56,437 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 13:22:56,438 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3550 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1231, Invalid=17951, Unknown=0, NotChecked=0, Total=19182 [2022-03-20 13:22:56,438 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 7606 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 7731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 7606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:22:56,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 173 Invalid, 7731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 7606 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 13:22:56,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 13:22:56,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-20 13:22:56,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-03-20 13:22:56,448 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 131 [2022-03-20 13:22:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:22:56,448 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-03-20 13:22:56,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.9538461538461538) internal successors, (127), 64 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:22:56,448 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-03-20 13:22:56,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-03-20 13:22:56,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:22:56,449 INFO L499 BasicCegarLoop]: trace histogram [61, 59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:22:56,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-03-20 13:22:56,649 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-03-20 13:22:56,649 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:22:56,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:22:56,650 INFO L85 PathProgramCache]: Analyzing trace with hash 701832630, now seen corresponding path program 59 times [2022-03-20 13:22:56,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:56,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [247041193] [2022-03-20 13:22:56,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:56,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:22:56,725 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:22:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash -782547537, now seen corresponding path program 1 times [2022-03-20 13:22:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:22:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229603449] [2022-03-20 13:22:56,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:56,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:22:56,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:56,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:22:56,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:56,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:22:56,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229603449] [2022-03-20 13:22:56,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229603449] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:22:56,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073684616] [2022-03-20 13:22:56,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:22:56,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:22:56,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:22:56,789 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:22:56,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-20 13:22:56,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:22:56,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:22:56,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:22:56,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:56,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:22:57,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:22:57,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073684616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:22:57,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:22:57,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:22:59,072 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:22:59,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [247041193] [2022-03-20 13:22:59,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [247041193] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:22:59,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:22:59,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 13:22:59,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441699121] [2022-03-20 13:22:59,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:22:59,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 13:22:59,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:22:59,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 13:22:59,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=570, Invalid=5592, Unknown=0, NotChecked=0, Total=6162 [2022-03-20 13:22:59,074 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:03,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:03,313 INFO L93 Difference]: Finished difference Result 144 states and 149 transitions. [2022-03-20 13:23:03,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 13:23:03,314 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-03-20 13:23:03,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:03,314 INFO L225 Difference]: With dead ends: 144 [2022-03-20 13:23:03,314 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 13:23:03,315 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3638 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1250, Invalid=18490, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 13:23:03,315 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 129 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7585 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 7585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:03,315 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 53 Invalid, 7712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 7585 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 13:23:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 13:23:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 13:23:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0303030303030303) internal successors, (136), 132 states have internal predecessors, (136), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:03,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-03-20 13:23:03,326 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 133 [2022-03-20 13:23:03,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:03,327 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-03-20 13:23:03,327 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 1.9545454545454546) internal successors, (129), 65 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:03,327 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-03-20 13:23:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 13:23:03,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:03,327 INFO L499 BasicCegarLoop]: trace histogram [62, 60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:03,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-03-20 13:23:03,528 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-20 13:23:03,528 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:03,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:03,529 INFO L85 PathProgramCache]: Analyzing trace with hash 387724817, now seen corresponding path program 60 times [2022-03-20 13:23:03,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:03,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [647627375] [2022-03-20 13:23:03,546 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:03,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:03,590 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:03,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1266984623, now seen corresponding path program 1 times [2022-03-20 13:23:03,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:03,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276298288] [2022-03-20 13:23:03,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:03,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:03,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:03,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:03,664 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:03,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276298288] [2022-03-20 13:23:03,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276298288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:03,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186022118] [2022-03-20 13:23:03,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:03,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:03,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:03,666 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:03,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-20 13:23:03,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:03,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:03,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:03,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:03,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:03,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186022118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:03,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:03,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:23:06,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:06,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [647627375] [2022-03-20 13:23:06,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [647627375] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:06,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:06,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-03-20 13:23:06,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133606622] [2022-03-20 13:23:06,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:06,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-03-20 13:23:06,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:06,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-03-20 13:23:06,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=5742, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 13:23:06,047 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:10,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:10,329 INFO L93 Difference]: Finished difference Result 146 states and 151 transitions. [2022-03-20 13:23:10,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-03-20 13:23:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-03-20 13:23:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:10,330 INFO L225 Difference]: With dead ends: 146 [2022-03-20 13:23:10,330 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 13:23:10,331 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3727 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1269, Invalid=19037, Unknown=0, NotChecked=0, Total=20306 [2022-03-20 13:23:10,331 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 131 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7672 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 7801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 7672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:10,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 33 Invalid, 7801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 7672 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 13:23:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 13:23:10,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 13:23:10,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0298507462686568) internal successors, (138), 134 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:10,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2022-03-20 13:23:10,339 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 135 [2022-03-20 13:23:10,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:10,339 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2022-03-20 13:23:10,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.955223880597015) internal successors, (131), 66 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:10,339 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2022-03-20 13:23:10,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-03-20 13:23:10,340 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:10,340 INFO L499 BasicCegarLoop]: trace histogram [63, 61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:10,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-20 13:23:10,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:10,541 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:10,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:10,541 INFO L85 PathProgramCache]: Analyzing trace with hash -822172756, now seen corresponding path program 61 times [2022-03-20 13:23:10,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:10,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2018118694] [2022-03-20 13:23:10,558 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:10,590 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:10,590 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:10,590 INFO L85 PathProgramCache]: Analyzing trace with hash -978450513, now seen corresponding path program 1 times [2022-03-20 13:23:10,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:10,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107927246] [2022-03-20 13:23:10,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:10,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:10,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:10,652 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:10,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107927246] [2022-03-20 13:23:10,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107927246] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:10,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002594110] [2022-03-20 13:23:10,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:10,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:10,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:10,653 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:10,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-20 13:23:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:10,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:10,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:10,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002594110] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:10,930 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:10,930 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:23:13,056 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:13,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2018118694] [2022-03-20 13:23:13,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2018118694] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:13,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:13,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 13:23:13,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904890362] [2022-03-20 13:23:13,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:13,057 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 13:23:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:13,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 13:23:13,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=586, Invalid=5894, Unknown=0, NotChecked=0, Total=6480 [2022-03-20 13:23:13,059 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:17,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:17,619 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2022-03-20 13:23:17,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 13:23:17,619 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-03-20 13:23:17,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:17,620 INFO L225 Difference]: With dead ends: 148 [2022-03-20 13:23:17,620 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 13:23:17,622 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3817 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1288, Invalid=19592, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 13:23:17,622 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 133 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 8402 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 8402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:17,622 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 198 Invalid, 8533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 8402 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 13:23:17,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 13:23:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-20 13:23:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0294117647058822) internal successors, (140), 136 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:17,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2022-03-20 13:23:17,640 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 137 [2022-03-20 13:23:17,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:17,641 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2022-03-20 13:23:17,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 68 states have (on average 1.9558823529411764) internal successors, (133), 67 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2022-03-20 13:23:17,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-03-20 13:23:17,641 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:17,641 INFO L499 BasicCegarLoop]: trace histogram [64, 62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:17,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-20 13:23:17,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:17,842 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:17,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:17,842 INFO L85 PathProgramCache]: Analyzing trace with hash 402396807, now seen corresponding path program 62 times [2022-03-20 13:23:17,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:17,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1896209088] [2022-03-20 13:23:17,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:17,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:17,891 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:17,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1071081647, now seen corresponding path program 1 times [2022-03-20 13:23:17,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:17,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684357932] [2022-03-20 13:23:17,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:17,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:17,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:17,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:17,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:17,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684357932] [2022-03-20 13:23:17,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684357932] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:17,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4462812] [2022-03-20 13:23:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:17,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:17,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:17,955 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:17,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-20 13:23:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:17,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:17,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:18,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:18,091 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:18,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4462812] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:18,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:18,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:23:20,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:20,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1896209088] [2022-03-20 13:23:20,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1896209088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:20,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:20,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-03-20 13:23:20,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892352019] [2022-03-20 13:23:20,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:20,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-03-20 13:23:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-03-20 13:23:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=6048, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 13:23:20,426 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:25,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:25,051 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-03-20 13:23:25,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-03-20 13:23:25,052 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-03-20 13:23:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:25,052 INFO L225 Difference]: With dead ends: 150 [2022-03-20 13:23:25,052 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 13:23:25,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3908 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1307, Invalid=20155, Unknown=0, NotChecked=0, Total=21462 [2022-03-20 13:23:25,054 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 135 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8372 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 8505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 8372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:25,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 123 Invalid, 8505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 8372 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 13:23:25,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 13:23:25,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-20 13:23:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0289855072463767) internal successors, (142), 138 states have internal predecessors, (142), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:25,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2022-03-20 13:23:25,063 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 139 [2022-03-20 13:23:25,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:25,063 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2022-03-20 13:23:25,063 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.9565217391304348) internal successors, (135), 68 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:25,063 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2022-03-20 13:23:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-03-20 13:23:25,063 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:25,063 INFO L499 BasicCegarLoop]: trace histogram [65, 63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:25,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-20 13:23:25,264 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-03-20 13:23:25,264 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:25,264 INFO L85 PathProgramCache]: Analyzing trace with hash 392707746, now seen corresponding path program 63 times [2022-03-20 13:23:25,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:25,264 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1906139463] [2022-03-20 13:23:25,286 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:25,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:25,318 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:25,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1174353489, now seen corresponding path program 1 times [2022-03-20 13:23:25,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:25,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284164000] [2022-03-20 13:23:25,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:25,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:25,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:25,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:25,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:25,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284164000] [2022-03-20 13:23:25,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284164000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:25,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755297408] [2022-03-20 13:23:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:25,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:25,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:25,385 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:25,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-20 13:23:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:25,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:25,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:25,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:25,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:25,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755297408] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:25,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:25,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:23:27,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:27,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1906139463] [2022-03-20 13:23:27,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1906139463] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:27,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:27,944 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 13:23:27,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691096168] [2022-03-20 13:23:27,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:27,944 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 13:23:27,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:27,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 13:23:27,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=602, Invalid=6204, Unknown=0, NotChecked=0, Total=6806 [2022-03-20 13:23:27,944 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:32,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:32,873 INFO L93 Difference]: Finished difference Result 152 states and 157 transitions. [2022-03-20 13:23:32,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 13:23:32,874 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-03-20 13:23:32,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:32,874 INFO L225 Difference]: With dead ends: 152 [2022-03-20 13:23:32,874 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 13:23:32,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1326, Invalid=20726, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 13:23:32,876 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 137 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 9224 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 9359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 9224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:32,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 338 Invalid, 9359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 9224 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 13:23:32,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 13:23:32,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 13:23:32,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:32,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-03-20 13:23:32,887 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 141 [2022-03-20 13:23:32,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:32,887 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-03-20 13:23:32,887 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 1.957142857142857) internal successors, (137), 69 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:32,887 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-03-20 13:23:32,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-03-20 13:23:32,888 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:32,888 INFO L499 BasicCegarLoop]: trace histogram [66, 64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:32,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-03-20 13:23:33,088 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-03-20 13:23:33,088 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:33,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:33,088 INFO L85 PathProgramCache]: Analyzing trace with hash -328545283, now seen corresponding path program 64 times [2022-03-20 13:23:33,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:33,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1744756848] [2022-03-20 13:23:33,107 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:33,138 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:33,138 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:33,138 INFO L85 PathProgramCache]: Analyzing trace with hash 875178671, now seen corresponding path program 1 times [2022-03-20 13:23:33,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:33,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070355147] [2022-03-20 13:23:33,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:33,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:33,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:33,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:33,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:33,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070355147] [2022-03-20 13:23:33,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070355147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:33,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418183907] [2022-03-20 13:23:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:33,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:33,204 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:33,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-20 13:23:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:33,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:33,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:33,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:33,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:33,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418183907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:33,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:33,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:23:35,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:35,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1744756848] [2022-03-20 13:23:35,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1744756848] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:35,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:35,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-03-20 13:23:35,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894011437] [2022-03-20 13:23:35,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:35,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-03-20 13:23:35,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:35,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-03-20 13:23:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=610, Invalid=6362, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 13:23:35,798 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:40,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:40,901 INFO L93 Difference]: Finished difference Result 154 states and 159 transitions. [2022-03-20 13:23:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-03-20 13:23:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-03-20 13:23:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:40,901 INFO L225 Difference]: With dead ends: 154 [2022-03-20 13:23:40,902 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 13:23:40,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4093 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1345, Invalid=21305, Unknown=0, NotChecked=0, Total=22650 [2022-03-20 13:23:40,904 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 139 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 9355 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 9492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 9355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:40,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 278 Invalid, 9492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 9355 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 13:23:40,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 13:23:40,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-20 13:23:40,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.028169014084507) internal successors, (146), 142 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:40,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2022-03-20 13:23:40,931 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 143 [2022-03-20 13:23:40,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:40,931 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2022-03-20 13:23:40,931 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.9577464788732395) internal successors, (139), 70 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:40,931 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2022-03-20 13:23:40,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-03-20 13:23:40,932 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:40,932 INFO L499 BasicCegarLoop]: trace histogram [67, 65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:40,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-03-20 13:23:41,139 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:41,139 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:41,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:41,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1962971496, now seen corresponding path program 65 times [2022-03-20 13:23:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:41,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873992998] [2022-03-20 13:23:41,157 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:41,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:41,199 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:41,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1370256465, now seen corresponding path program 1 times [2022-03-20 13:23:41,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:41,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879838074] [2022-03-20 13:23:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:41,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:41,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:41,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:41,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879838074] [2022-03-20 13:23:41,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879838074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120855560] [2022-03-20 13:23:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:41,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:41,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:41,266 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:41,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-20 13:23:41,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:41,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:41,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:41,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:41,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120855560] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:41,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:41,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:23:43,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873992998] [2022-03-20 13:23:43,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873992998] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:43,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:43,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 13:23:43,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369971958] [2022-03-20 13:23:43,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:43,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 13:23:43,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 13:23:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=618, Invalid=6522, Unknown=0, NotChecked=0, Total=7140 [2022-03-20 13:23:43,913 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:49,023 INFO L93 Difference]: Finished difference Result 156 states and 161 transitions. [2022-03-20 13:23:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 13:23:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-03-20 13:23:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:49,024 INFO L225 Difference]: With dead ends: 156 [2022-03-20 13:23:49,024 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 13:23:49,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4187 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1364, Invalid=21892, Unknown=0, NotChecked=0, Total=23256 [2022-03-20 13:23:49,026 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 141 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 9501 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 9640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 9501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:49,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 223 Invalid, 9640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 9501 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 13:23:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 13:23:49,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-20 13:23:49,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0277777777777777) internal successors, (148), 144 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:49,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2022-03-20 13:23:49,039 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 145 [2022-03-20 13:23:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:49,039 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2022-03-20 13:23:49,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.9583333333333333) internal successors, (141), 71 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2022-03-20 13:23:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-03-20 13:23:49,040 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:49,040 INFO L499 BasicCegarLoop]: trace histogram [68, 66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:49,057 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-03-20 13:23:49,247 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-20 13:23:49,247 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash -688531853, now seen corresponding path program 66 times [2022-03-20 13:23:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:49,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [896748444] [2022-03-20 13:23:49,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:49,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:49,307 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:49,307 INFO L85 PathProgramCache]: Analyzing trace with hash 679275695, now seen corresponding path program 1 times [2022-03-20 13:23:49,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:49,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960297734] [2022-03-20 13:23:49,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:49,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:49,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:49,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:49,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960297734] [2022-03-20 13:23:49,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960297734] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:49,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595801286] [2022-03-20 13:23:49,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:49,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:49,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:49,377 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:49,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-20 13:23:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:49,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:49,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:49,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:49,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:49,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595801286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:49,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:49,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:23:52,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:23:52,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [896748444] [2022-03-20 13:23:52,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [896748444] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:23:52,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:23:52,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-03-20 13:23:52,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721813654] [2022-03-20 13:23:52,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:23:52,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-03-20 13:23:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-03-20 13:23:52,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=699, Invalid=6783, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:23:52,240 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:23:57,509 INFO L93 Difference]: Finished difference Result 158 states and 163 transitions. [2022-03-20 13:23:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-03-20 13:23:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-03-20 13:23:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:23:57,510 INFO L225 Difference]: With dead ends: 158 [2022-03-20 13:23:57,510 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 13:23:57,511 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4423 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1523, Invalid=22657, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 13:23:57,515 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 143 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 9541 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 9682 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 9541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:23:57,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 118 Invalid, 9682 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 9541 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-03-20 13:23:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 13:23:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 13:23:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 146 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:57,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2022-03-20 13:23:57,528 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 147 [2022-03-20 13:23:57,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:23:57,529 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2022-03-20 13:23:57,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.9589041095890412) internal successors, (143), 72 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:23:57,529 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2022-03-20 13:23:57,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-20 13:23:57,529 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:23:57,530 INFO L499 BasicCegarLoop]: trace histogram [69, 67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:23:57,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-03-20 13:23:57,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-20 13:23:57,739 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:23:57,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:23:57,740 INFO L85 PathProgramCache]: Analyzing trace with hash -17714290, now seen corresponding path program 67 times [2022-03-20 13:23:57,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:23:57,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1992678132] [2022-03-20 13:23:57,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:57,788 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:23:57,788 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:23:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1566159441, now seen corresponding path program 1 times [2022-03-20 13:23:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:23:57,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988132750] [2022-03-20 13:23:57,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:57,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:23:57,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:57,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:23:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:57,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:23:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988132750] [2022-03-20 13:23:57,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988132750] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:23:57,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285480637] [2022-03-20 13:23:57,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:23:57,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:23:57,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:23:57,853 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:23:57,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-20 13:23:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:23:57,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:23:57,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:23:57,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:57,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:23:58,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:23:58,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285480637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:23:58,149 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:23:58,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:24:00,658 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:00,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1992678132] [2022-03-20 13:24:00,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1992678132] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:00,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:00,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 13:24:00,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11789180] [2022-03-20 13:24:00,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:00,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 13:24:00,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:00,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 13:24:00,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=634, Invalid=6848, Unknown=0, NotChecked=0, Total=7482 [2022-03-20 13:24:00,660 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:05,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:24:05,908 INFO L93 Difference]: Finished difference Result 160 states and 165 transitions. [2022-03-20 13:24:05,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 13:24:05,908 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-03-20 13:24:05,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:24:05,912 INFO L225 Difference]: With dead ends: 160 [2022-03-20 13:24:05,912 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 13:24:05,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 89 SyntacticMatches, 3 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4378 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1402, Invalid=23090, Unknown=0, NotChecked=0, Total=24492 [2022-03-20 13:24:05,913 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 145 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 9521 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 9664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 9521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:24:05,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 43 Invalid, 9664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 9521 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-03-20 13:24:05,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 13:24:05,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 13:24:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.027027027027027) internal successors, (152), 148 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2022-03-20 13:24:05,923 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 149 [2022-03-20 13:24:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:24:05,924 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2022-03-20 13:24:05,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.9594594594594594) internal successors, (145), 73 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:05,924 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2022-03-20 13:24:05,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-03-20 13:24:05,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:24:05,924 INFO L499 BasicCegarLoop]: trace histogram [70, 68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:24:05,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-20 13:24:06,133 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-03-20 13:24:06,133 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:24:06,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:24:06,134 INFO L85 PathProgramCache]: Analyzing trace with hash 392869353, now seen corresponding path program 68 times [2022-03-20 13:24:06,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:06,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199770231] [2022-03-20 13:24:06,157 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:06,188 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:06,188 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:24:06,189 INFO L85 PathProgramCache]: Analyzing trace with hash 483372719, now seen corresponding path program 1 times [2022-03-20 13:24:06,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:24:06,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009689880] [2022-03-20 13:24:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:06,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:24:06,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:06,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:24:06,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:06,245 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:06,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:24:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009689880] [2022-03-20 13:24:06,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009689880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:24:06,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051360044] [2022-03-20 13:24:06,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:06,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:06,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:24:06,247 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:24:06,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-20 13:24:06,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:06,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:24:06,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:24:06,389 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:06,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:24:06,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:06,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051360044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:24:06,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:24:06,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:24:09,081 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:09,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199770231] [2022-03-20 13:24:09,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199770231] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:09,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:09,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-03-20 13:24:09,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797967312] [2022-03-20 13:24:09,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:09,081 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-03-20 13:24:09,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:09,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-03-20 13:24:09,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=642, Invalid=7014, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 13:24:09,082 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 76 states, 75 states have (on average 1.96) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:24:14,582 INFO L93 Difference]: Finished difference Result 162 states and 167 transitions. [2022-03-20 13:24:14,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-03-20 13:24:14,583 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.96) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-03-20 13:24:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:24:14,583 INFO L225 Difference]: With dead ends: 162 [2022-03-20 13:24:14,584 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 13:24:14,585 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4475 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1421, Invalid=23701, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 13:24:14,585 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 147 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 10117 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 10262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 10117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:24:14,585 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 188 Invalid, 10262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 10117 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 13:24:14,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 13:24:14,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 13:24:14,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:14,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-03-20 13:24:14,594 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 151 [2022-03-20 13:24:14,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:24:14,594 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-03-20 13:24:14,595 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.96) internal successors, (147), 74 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:14,595 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-03-20 13:24:14,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-03-20 13:24:14,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:24:14,595 INFO L499 BasicCegarLoop]: trace histogram [71, 69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:24:14,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-03-20 13:24:14,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-03-20 13:24:14,815 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:24:14,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:24:14,815 INFO L85 PathProgramCache]: Analyzing trace with hash -173240956, now seen corresponding path program 69 times [2022-03-20 13:24:14,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:14,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [458693437] [2022-03-20 13:24:14,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:14,875 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:14,875 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:24:14,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1762062417, now seen corresponding path program 1 times [2022-03-20 13:24:14,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:24:14,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069992271] [2022-03-20 13:24:14,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:14,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:24:14,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:14,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:24:14,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:14,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:14,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:24:14,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069992271] [2022-03-20 13:24:14,948 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069992271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:24:14,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651583617] [2022-03-20 13:24:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:14,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:14,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:24:14,949 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:24:14,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-20 13:24:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:14,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:24:14,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:24:15,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:15,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:24:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:15,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651583617] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:24:15,305 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:24:15,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:24:17,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:17,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [458693437] [2022-03-20 13:24:17,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [458693437] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:17,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:17,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 13:24:17,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128992696] [2022-03-20 13:24:17,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:17,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 13:24:17,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:17,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 13:24:17,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=650, Invalid=7182, Unknown=0, NotChecked=0, Total=7832 [2022-03-20 13:24:17,917 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:23,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:24:23,626 INFO L93 Difference]: Finished difference Result 164 states and 169 transitions. [2022-03-20 13:24:23,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 13:24:23,627 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-03-20 13:24:23,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:24:23,627 INFO L225 Difference]: With dead ends: 164 [2022-03-20 13:24:23,627 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 13:24:23,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 91 SyntacticMatches, 3 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4573 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=1440, Invalid=24320, Unknown=0, NotChecked=0, Total=25760 [2022-03-20 13:24:23,628 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 149 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 10620 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 10767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:24:23,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 228 Invalid, 10767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 10620 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 13:24:23,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 13:24:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-20 13:24:23,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.0263157894736843) internal successors, (156), 152 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:23,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2022-03-20 13:24:23,639 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 153 [2022-03-20 13:24:23,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:24:23,639 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2022-03-20 13:24:23,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 75 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:23,639 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2022-03-20 13:24:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-03-20 13:24:23,640 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:24:23,640 INFO L499 BasicCegarLoop]: trace histogram [72, 70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:24:23,656 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-20 13:24:23,840 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:23,840 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:24:23,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:24:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1255598687, now seen corresponding path program 70 times [2022-03-20 13:24:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:23,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1265152517] [2022-03-20 13:24:23,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:23,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:23,906 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:24:23,907 INFO L85 PathProgramCache]: Analyzing trace with hash 287469743, now seen corresponding path program 1 times [2022-03-20 13:24:23,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:24:23,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089922492] [2022-03-20 13:24:23,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:23,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:24:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:23,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:24:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:23,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:24:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089922492] [2022-03-20 13:24:23,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089922492] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:24:23,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776536275] [2022-03-20 13:24:23,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:23,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:23,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:24:23,973 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:24:23,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-20 13:24:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:23,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:24:23,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:24:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:24,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:24:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776536275] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:24:24,240 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:24:24,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:24:26,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:26,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1265152517] [2022-03-20 13:24:26,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1265152517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:26,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:26,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-03-20 13:24:26,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419164901] [2022-03-20 13:24:26,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:26,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-03-20 13:24:26,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:26,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-03-20 13:24:26,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=658, Invalid=7352, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:24:26,918 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand has 78 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:32,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:24:32,724 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-03-20 13:24:32,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-03-20 13:24:32,724 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-03-20 13:24:32,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:24:32,725 INFO L225 Difference]: With dead ends: 166 [2022-03-20 13:24:32,725 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 13:24:32,726 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4672 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1459, Invalid=24947, Unknown=0, NotChecked=0, Total=26406 [2022-03-20 13:24:32,726 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 151 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 10628 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 10777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 10628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:24:32,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 163 Invalid, 10777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 10628 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-20 13:24:32,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 13:24:32,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-20 13:24:32,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.025974025974026) internal successors, (158), 154 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:32,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2022-03-20 13:24:32,740 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 155 [2022-03-20 13:24:32,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:24:32,741 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2022-03-20 13:24:32,741 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.9610389610389611) internal successors, (151), 76 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:32,741 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2022-03-20 13:24:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-03-20 13:24:32,741 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:24:32,741 INFO L499 BasicCegarLoop]: trace histogram [73, 71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:24:32,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-20 13:24:32,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:32,964 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:24:32,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:24:32,964 INFO L85 PathProgramCache]: Analyzing trace with hash -19039110, now seen corresponding path program 71 times [2022-03-20 13:24:32,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:32,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207647629] [2022-03-20 13:24:32,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:33,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:33,029 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:24:33,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1957965393, now seen corresponding path program 1 times [2022-03-20 13:24:33,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:24:33,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144226461] [2022-03-20 13:24:33,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:33,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:24:33,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:33,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:24:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:33,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:24:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144226461] [2022-03-20 13:24:33,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144226461] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:24:33,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114578809] [2022-03-20 13:24:33,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:33,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:33,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:24:33,109 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:24:33,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-20 13:24:33,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:33,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:24:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:24:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:33,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:24:33,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:33,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114578809] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:24:33,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:24:33,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:24:36,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:36,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207647629] [2022-03-20 13:24:36,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207647629] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:36,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:36,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 13:24:36,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763191135] [2022-03-20 13:24:36,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:36,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 13:24:36,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:36,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 13:24:36,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=7429, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 13:24:36,155 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:42,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:24:42,277 INFO L93 Difference]: Finished difference Result 168 states and 173 transitions. [2022-03-20 13:24:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 13:24:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-03-20 13:24:42,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:24:42,278 INFO L225 Difference]: With dead ends: 168 [2022-03-20 13:24:42,278 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 13:24:42,280 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 93 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4615 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1319, Invalid=25413, Unknown=0, NotChecked=0, Total=26732 [2022-03-20 13:24:42,280 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 153 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 11407 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 11558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 11407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:24:42,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 323 Invalid, 11558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 11407 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 13:24:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 13:24:42,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-20 13:24:42,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:42,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-03-20 13:24:42,291 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 157 [2022-03-20 13:24:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:24:42,291 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-03-20 13:24:42,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 1.9615384615384615) internal successors, (153), 77 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-03-20 13:24:42,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-03-20 13:24:42,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:24:42,292 INFO L499 BasicCegarLoop]: trace histogram [74, 72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:24:42,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-20 13:24:42,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:42,492 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:24:42,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:24:42,492 INFO L85 PathProgramCache]: Analyzing trace with hash -880282667, now seen corresponding path program 72 times [2022-03-20 13:24:42,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:42,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1310706208] [2022-03-20 13:24:42,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:42,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:42,553 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:24:42,553 INFO L85 PathProgramCache]: Analyzing trace with hash 91566767, now seen corresponding path program 1 times [2022-03-20 13:24:42,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:24:42,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253237547] [2022-03-20 13:24:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:42,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:24:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:42,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:24:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:42,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:42,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:24:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253237547] [2022-03-20 13:24:42,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253237547] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:24:42,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105398461] [2022-03-20 13:24:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:42,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:42,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:24:42,629 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:24:42,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-20 13:24:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:42,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:24:42,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:24:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:42,811 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:24:42,970 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:42,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105398461] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:24:42,970 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:24:42,970 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:24:45,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:45,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1310706208] [2022-03-20 13:24:45,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1310706208] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:45,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:45,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-03-20 13:24:45,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296673567] [2022-03-20 13:24:45,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:45,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-03-20 13:24:45,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:45,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-03-20 13:24:45,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=7698, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 13:24:45,796 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:24:51,948 INFO L93 Difference]: Finished difference Result 170 states and 175 transitions. [2022-03-20 13:24:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-03-20 13:24:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-03-20 13:24:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:24:51,949 INFO L225 Difference]: With dead ends: 170 [2022-03-20 13:24:51,949 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 13:24:51,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 94 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4873 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1497, Invalid=26225, Unknown=0, NotChecked=0, Total=27722 [2022-03-20 13:24:51,950 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 155 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 11331 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 11484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 11331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:24:51,950 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 218 Invalid, 11484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 11331 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-03-20 13:24:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 13:24:51,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-20 13:24:51,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0253164556962024) internal successors, (162), 158 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:51,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2022-03-20 13:24:51,964 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 159 [2022-03-20 13:24:51,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:24:51,964 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2022-03-20 13:24:51,964 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.9620253164556962) internal successors, (155), 78 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:24:51,964 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2022-03-20 13:24:51,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-03-20 13:24:51,965 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:24:51,965 INFO L499 BasicCegarLoop]: trace histogram [75, 73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:24:51,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-03-20 13:24:52,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-20 13:24:52,171 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:24:52,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:24:52,172 INFO L85 PathProgramCache]: Analyzing trace with hash 393347184, now seen corresponding path program 73 times [2022-03-20 13:24:52,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:52,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [414863424] [2022-03-20 13:24:52,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:52,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:24:52,243 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:24:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2141098927, now seen corresponding path program 1 times [2022-03-20 13:24:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:24:52,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764797754] [2022-03-20 13:24:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:52,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:24:52,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:52,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:24:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:52,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:52,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:24:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764797754] [2022-03-20 13:24:52,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764797754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:24:52,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060526191] [2022-03-20 13:24:52,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:24:52,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:24:52,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:24:52,300 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:24:52,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-20 13:24:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:24:52,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:24:52,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:24:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:52,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:24:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:24:52,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060526191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:24:52,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:24:52,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:24:55,456 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:24:55,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [414863424] [2022-03-20 13:24:55,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [414863424] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:24:55,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:24:55,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 13:24:55,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054754760] [2022-03-20 13:24:55,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:24:55,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 13:24:55,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:24:55,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 13:24:55,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=7777, Unknown=0, NotChecked=0, Total=8372 [2022-03-20 13:24:55,458 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand has 81 states, 80 states have (on average 1.9625) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:01,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:25:01,830 INFO L93 Difference]: Finished difference Result 172 states and 177 transitions. [2022-03-20 13:25:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 13:25:01,831 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 80 states have (on average 1.9625) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-03-20 13:25:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:25:01,831 INFO L225 Difference]: With dead ends: 172 [2022-03-20 13:25:01,831 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 13:25:01,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4814 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1353, Invalid=26703, Unknown=0, NotChecked=0, Total=28056 [2022-03-20 13:25:01,834 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 157 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 11814 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 11969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 11814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:25:01,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 238 Invalid, 11969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 11814 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 13:25:01,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 13:25:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-20 13:25:01,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:01,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-03-20 13:25:01,847 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 161 [2022-03-20 13:25:01,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:25:01,847 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-03-20 13:25:01,848 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 80 states have (on average 1.9625) internal successors, (157), 79 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:01,848 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-03-20 13:25:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-20 13:25:01,848 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:25:01,848 INFO L499 BasicCegarLoop]: trace histogram [76, 74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:25:01,871 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-20 13:25:02,064 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:02,064 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:25:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:25:02,064 INFO L85 PathProgramCache]: Analyzing trace with hash 285954635, now seen corresponding path program 74 times [2022-03-20 13:25:02,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:02,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1760506329] [2022-03-20 13:25:02,086 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:02,129 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:02,130 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:25:02,130 INFO L85 PathProgramCache]: Analyzing trace with hash -104336209, now seen corresponding path program 1 times [2022-03-20 13:25:02,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:25:02,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71588177] [2022-03-20 13:25:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:02,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:25:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:02,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:25:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:02,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:02,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:25:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71588177] [2022-03-20 13:25:02,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71588177] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:25:02,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546113025] [2022-03-20 13:25:02,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:02,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:02,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:25:02,200 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:25:02,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-20 13:25:02,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:25:02,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:25:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:02,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:25:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:02,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546113025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:25:02,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:25:02,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:25:05,404 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:25:05,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1760506329] [2022-03-20 13:25:05,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1760506329] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:25:05,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:25:05,405 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-03-20 13:25:05,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583903958] [2022-03-20 13:25:05,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:25:05,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-03-20 13:25:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-03-20 13:25:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=690, Invalid=8052, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 13:25:05,406 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:12,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:25:12,043 INFO L93 Difference]: Finished difference Result 174 states and 179 transitions. [2022-03-20 13:25:12,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-03-20 13:25:12,043 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-03-20 13:25:12,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:25:12,044 INFO L225 Difference]: With dead ends: 174 [2022-03-20 13:25:12,044 INFO L226 Difference]: Without dead ends: 167 [2022-03-20 13:25:12,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5078 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1535, Invalid=27535, Unknown=0, NotChecked=0, Total=29070 [2022-03-20 13:25:12,045 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 159 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 12403 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 12560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 12403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:25:12,046 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 368 Invalid, 12560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 12403 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 13:25:12,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-03-20 13:25:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-03-20 13:25:12,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0246913580246915) internal successors, (166), 162 states have internal predecessors, (166), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:12,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2022-03-20 13:25:12,055 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 163 [2022-03-20 13:25:12,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:25:12,055 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2022-03-20 13:25:12,055 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.962962962962963) internal successors, (159), 80 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:12,055 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2022-03-20 13:25:12,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-03-20 13:25:12,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:25:12,056 INFO L499 BasicCegarLoop]: trace histogram [77, 75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:25:12,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-20 13:25:12,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:12,256 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:25:12,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:25:12,257 INFO L85 PathProgramCache]: Analyzing trace with hash 160930150, now seen corresponding path program 75 times [2022-03-20 13:25:12,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:12,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [596106900] [2022-03-20 13:25:12,273 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:12,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:12,316 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:25:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1945195951, now seen corresponding path program 1 times [2022-03-20 13:25:12,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:25:12,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586854842] [2022-03-20 13:25:12,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:12,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:25:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:12,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:25:12,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:12,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:25:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586854842] [2022-03-20 13:25:12,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586854842] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:25:12,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346208389] [2022-03-20 13:25:12,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:12,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:25:12,392 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:25:12,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-20 13:25:12,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:12,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:25:12,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:25:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:12,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:25:12,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:12,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346208389] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:25:12,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:25:12,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:25:15,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:25:15,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [596106900] [2022-03-20 13:25:15,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [596106900] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:25:15,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:25:15,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 13:25:15,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405940768] [2022-03-20 13:25:15,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:25:15,686 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 13:25:15,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:15,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 13:25:15,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=698, Invalid=8232, Unknown=0, NotChecked=0, Total=8930 [2022-03-20 13:25:15,687 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand has 83 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:22,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:25:22,392 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-03-20 13:25:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 13:25:22,393 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-03-20 13:25:22,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:25:22,393 INFO L225 Difference]: With dead ends: 176 [2022-03-20 13:25:22,393 INFO L226 Difference]: Without dead ends: 169 [2022-03-20 13:25:22,395 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5182 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=1554, Invalid=28202, Unknown=0, NotChecked=0, Total=29756 [2022-03-20 13:25:22,395 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 161 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 12476 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 12635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 12476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:25:22,395 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 328 Invalid, 12635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 12476 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 13:25:22,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-20 13:25:22,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2022-03-20 13:25:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.024390243902439) internal successors, (168), 164 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:22,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2022-03-20 13:25:22,410 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 165 [2022-03-20 13:25:22,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:25:22,410 INFO L478 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2022-03-20 13:25:22,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.9634146341463414) internal successors, (161), 81 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2022-03-20 13:25:22,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-03-20 13:25:22,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:25:22,411 INFO L499 BasicCegarLoop]: trace histogram [78, 76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:25:22,433 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-03-20 13:25:22,627 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-20 13:25:22,627 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:25:22,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:25:22,627 INFO L85 PathProgramCache]: Analyzing trace with hash 271484353, now seen corresponding path program 76 times [2022-03-20 13:25:22,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:22,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910319330] [2022-03-20 13:25:22,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:22,687 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:22,687 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:25:22,687 INFO L85 PathProgramCache]: Analyzing trace with hash -300239185, now seen corresponding path program 1 times [2022-03-20 13:25:22,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:25:22,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901995606] [2022-03-20 13:25:22,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:22,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:25:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:22,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:25:22,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:22,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:22,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:25:22,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901995606] [2022-03-20 13:25:22,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901995606] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:25:22,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442720657] [2022-03-20 13:25:22,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:22,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:22,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:25:22,751 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:25:22,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-20 13:25:22,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:22,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:25:22,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:25:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:22,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:25:23,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:23,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442720657] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:25:23,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:25:23,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:25:26,223 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:25:26,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910319330] [2022-03-20 13:25:26,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910319330] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:25:26,223 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:25:26,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-03-20 13:25:26,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711538835] [2022-03-20 13:25:26,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:25:26,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-03-20 13:25:26,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:26,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-03-20 13:25:26,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=789, Invalid=8523, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 13:25:26,224 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:33,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:25:33,158 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2022-03-20 13:25:33,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-03-20 13:25:33,159 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-03-20 13:25:33,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:25:33,160 INFO L225 Difference]: With dead ends: 178 [2022-03-20 13:25:33,160 INFO L226 Difference]: Without dead ends: 171 [2022-03-20 13:25:33,161 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5448 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1733, Invalid=29067, Unknown=0, NotChecked=0, Total=30800 [2022-03-20 13:25:33,162 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 163 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 12955 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 13116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 12955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:25:33,162 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 338 Invalid, 13116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 12955 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-03-20 13:25:33,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-20 13:25:33,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-03-20 13:25:33,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0240963855421688) internal successors, (170), 166 states have internal predecessors, (170), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:33,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2022-03-20 13:25:33,176 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 167 [2022-03-20 13:25:33,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:25:33,177 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2022-03-20 13:25:33,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 82 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:33,177 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2022-03-20 13:25:33,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-03-20 13:25:33,177 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:25:33,178 INFO L499 BasicCegarLoop]: trace histogram [79, 77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:25:33,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-03-20 13:25:33,387 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-03-20 13:25:33,387 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:25:33,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:25:33,388 INFO L85 PathProgramCache]: Analyzing trace with hash -860108964, now seen corresponding path program 77 times [2022-03-20 13:25:33,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:33,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322168482] [2022-03-20 13:25:33,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:33,441 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:33,441 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:25:33,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1749292975, now seen corresponding path program 1 times [2022-03-20 13:25:33,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:25:33,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089717470] [2022-03-20 13:25:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:33,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:25:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:33,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:25:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:33,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:33,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:25:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089717470] [2022-03-20 13:25:33,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089717470] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:25:33,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112416195] [2022-03-20 13:25:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:33,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:33,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:25:33,500 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:25:33,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-20 13:25:33,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:25:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:25:33,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:33,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:25:33,760 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:33,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112416195] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:25:33,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:25:33,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:25:36,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:25:36,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322168482] [2022-03-20 13:25:36,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322168482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:25:36,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:25:36,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 13:25:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222943129] [2022-03-20 13:25:36,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:25:36,907 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 13:25:36,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:36,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 13:25:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=714, Invalid=8598, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 13:25:36,908 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:25:44,022 INFO L93 Difference]: Finished difference Result 180 states and 185 transitions. [2022-03-20 13:25:44,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 13:25:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-03-20 13:25:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:25:44,023 INFO L225 Difference]: With dead ends: 180 [2022-03-20 13:25:44,023 INFO L226 Difference]: Without dead ends: 173 [2022-03-20 13:25:44,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5393 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1592, Invalid=29560, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 13:25:44,024 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 165 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 13109 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 13272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 13109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:25:44,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 333 Invalid, 13272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 13109 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 13:25:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-03-20 13:25:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-03-20 13:25:44,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0238095238095237) internal successors, (172), 168 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:44,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2022-03-20 13:25:44,034 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 169 [2022-03-20 13:25:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:25:44,034 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2022-03-20 13:25:44,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 84 states have (on average 1.9642857142857142) internal successors, (165), 83 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2022-03-20 13:25:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-03-20 13:25:44,035 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:25:44,035 INFO L499 BasicCegarLoop]: trace histogram [80, 78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:25:44,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-03-20 13:25:44,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:44,255 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:25:44,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:25:44,255 INFO L85 PathProgramCache]: Analyzing trace with hash -1694560713, now seen corresponding path program 78 times [2022-03-20 13:25:44,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:44,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [470525216] [2022-03-20 13:25:44,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:44,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:44,309 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:25:44,309 INFO L85 PathProgramCache]: Analyzing trace with hash -496142161, now seen corresponding path program 1 times [2022-03-20 13:25:44,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:25:44,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100829147] [2022-03-20 13:25:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:44,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:25:44,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:44,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:25:44,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:44,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:25:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100829147] [2022-03-20 13:25:44,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100829147] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:25:44,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009340676] [2022-03-20 13:25:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:44,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:25:44,375 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:25:44,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-20 13:25:44,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:25:44,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:25:44,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:44,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:25:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:44,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009340676] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:25:44,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:25:44,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:25:47,983 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:25:47,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [470525216] [2022-03-20 13:25:47,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [470525216] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:25:47,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:25:47,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-03-20 13:25:47,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613493473] [2022-03-20 13:25:47,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:25:47,984 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-03-20 13:25:47,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:47,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-03-20 13:25:47,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=8682, Unknown=0, NotChecked=0, Total=9312 [2022-03-20 13:25:47,985 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand has 86 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:55,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:25:55,310 INFO L93 Difference]: Finished difference Result 182 states and 187 transitions. [2022-03-20 13:25:55,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-03-20 13:25:55,310 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-03-20 13:25:55,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:25:55,311 INFO L225 Difference]: With dead ends: 182 [2022-03-20 13:25:55,311 INFO L226 Difference]: Without dead ends: 175 [2022-03-20 13:25:55,312 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 100 SyntacticMatches, 4 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5329 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1438, Invalid=30068, Unknown=0, NotChecked=0, Total=31506 [2022-03-20 13:25:55,312 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 167 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 13688 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 13853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 13688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:25:55,312 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 383 Invalid, 13853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 13688 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 13:25:55,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-20 13:25:55,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-03-20 13:25:55,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-03-20 13:25:55,327 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 171 [2022-03-20 13:25:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:25:55,328 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-03-20 13:25:55,328 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.964705882352941) internal successors, (167), 84 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:25:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-03-20 13:25:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-03-20 13:25:55,328 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:25:55,329 INFO L499 BasicCegarLoop]: trace histogram [81, 79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:25:55,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-03-20 13:25:55,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:55,551 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:25:55,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:25:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -443807150, now seen corresponding path program 79 times [2022-03-20 13:25:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:55,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709761724] [2022-03-20 13:25:55,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:55,616 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:25:55,616 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:25:55,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1553389999, now seen corresponding path program 1 times [2022-03-20 13:25:55,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:25:55,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116978131] [2022-03-20 13:25:55,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:55,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:25:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:55,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:25:55,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:25:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116978131] [2022-03-20 13:25:55,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116978131] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:25:55,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037384212] [2022-03-20 13:25:55,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:25:55,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:25:55,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:25:55,688 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:25:55,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-20 13:25:55,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:25:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:25:55,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:25:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:55,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:25:55,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:25:55,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037384212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:25:55,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:25:55,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:25:59,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:25:59,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709761724] [2022-03-20 13:25:59,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709761724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:25:59,264 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:25:59,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 13:25:59,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379688829] [2022-03-20 13:25:59,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:25:59,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 13:25:59,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:25:59,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 13:25:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=8972, Unknown=0, NotChecked=0, Total=9702 [2022-03-20 13:25:59,269 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 87 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:06,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:26:06,507 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2022-03-20 13:26:06,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 13:26:06,507 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-03-20 13:26:06,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:26:06,508 INFO L225 Difference]: With dead ends: 184 [2022-03-20 13:26:06,508 INFO L226 Difference]: Without dead ends: 177 [2022-03-20 13:26:06,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 101 SyntacticMatches, 3 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5608 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1630, Invalid=30950, Unknown=0, NotChecked=0, Total=32580 [2022-03-20 13:26:06,510 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 169 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 13197 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 13364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 13197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:26:06,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 83 Invalid, 13364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 13197 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 13:26:06,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-20 13:26:06,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-03-20 13:26:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0232558139534884) internal successors, (176), 172 states have internal predecessors, (176), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2022-03-20 13:26:06,521 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 173 [2022-03-20 13:26:06,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:26:06,521 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2022-03-20 13:26:06,521 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 1.9651162790697674) internal successors, (169), 85 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2022-03-20 13:26:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-03-20 13:26:06,522 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:26:06,522 INFO L499 BasicCegarLoop]: trace histogram [82, 80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:26:06,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-20 13:26:06,742 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-20 13:26:06,743 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:26:06,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:26:06,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1060475987, now seen corresponding path program 80 times [2022-03-20 13:26:06,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:06,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [837161622] [2022-03-20 13:26:06,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:06,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:06,803 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:26:06,803 INFO L85 PathProgramCache]: Analyzing trace with hash -692045137, now seen corresponding path program 1 times [2022-03-20 13:26:06,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:26:06,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303395601] [2022-03-20 13:26:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:06,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:26:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:06,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:26:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:06,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:26:06,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303395601] [2022-03-20 13:26:06,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303395601] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:26:06,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884145491] [2022-03-20 13:26:06,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:06,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:06,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:26:06,871 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:26:06,871 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-20 13:26:06,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:06,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:26:06,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:26:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:07,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:26:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:07,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884145491] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:26:07,150 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:26:07,150 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:26:10,502 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:26:10,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [837161622] [2022-03-20 13:26:10,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [837161622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:26:10,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:26:10,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-03-20 13:26:10,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650806879] [2022-03-20 13:26:10,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:26:10,502 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-03-20 13:26:10,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:10,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-03-20 13:26:10,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=738, Invalid=9162, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 13:26:10,503 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:17,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:26:17,957 INFO L93 Difference]: Finished difference Result 186 states and 191 transitions. [2022-03-20 13:26:17,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-03-20 13:26:17,957 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-03-20 13:26:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:26:17,958 INFO L225 Difference]: With dead ends: 186 [2022-03-20 13:26:17,958 INFO L226 Difference]: Without dead ends: 179 [2022-03-20 13:26:17,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5717 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1649, Invalid=31657, Unknown=0, NotChecked=0, Total=33306 [2022-03-20 13:26:17,959 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 171 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 13643 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 13812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 13643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:26:17,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 138 Invalid, 13812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 13643 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 13:26:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-03-20 13:26:17,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-03-20 13:26:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0229885057471264) internal successors, (178), 174 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2022-03-20 13:26:17,969 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 175 [2022-03-20 13:26:17,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:26:17,969 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2022-03-20 13:26:17,970 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 86 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2022-03-20 13:26:17,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-20 13:26:17,970 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:26:17,970 INFO L499 BasicCegarLoop]: trace histogram [83, 81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:26:17,986 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-20 13:26:18,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:18,171 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:26:18,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:26:18,171 INFO L85 PathProgramCache]: Analyzing trace with hash -973741496, now seen corresponding path program 81 times [2022-03-20 13:26:18,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:18,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [291086560] [2022-03-20 13:26:18,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:18,226 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:18,227 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:26:18,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1357487023, now seen corresponding path program 1 times [2022-03-20 13:26:18,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:26:18,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634409670] [2022-03-20 13:26:18,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:18,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:26:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:18,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:26:18,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:18,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:26:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634409670] [2022-03-20 13:26:18,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634409670] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:26:18,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327731006] [2022-03-20 13:26:18,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:18,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:18,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:26:18,290 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:26:18,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-20 13:26:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:18,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:26:18,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:26:18,431 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:18,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:26:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:18,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327731006] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:26:18,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:26:18,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:26:21,994 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:26:21,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [291086560] [2022-03-20 13:26:21,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [291086560] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:26:21,995 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:26:21,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 13:26:21,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452246724] [2022-03-20 13:26:21,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:26:21,995 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 13:26:21,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:21,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 13:26:21,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=9354, Unknown=0, NotChecked=0, Total=10100 [2022-03-20 13:26:21,996 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:29,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:26:29,761 INFO L93 Difference]: Finished difference Result 188 states and 193 transitions. [2022-03-20 13:26:29,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 13:26:29,761 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-03-20 13:26:29,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:26:29,762 INFO L225 Difference]: With dead ends: 188 [2022-03-20 13:26:29,762 INFO L226 Difference]: Without dead ends: 181 [2022-03-20 13:26:29,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 103 SyntacticMatches, 3 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5827 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=1668, Invalid=32372, Unknown=0, NotChecked=0, Total=34040 [2022-03-20 13:26:29,763 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 173 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 14526 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 14697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 14526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:26:29,763 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 318 Invalid, 14697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 14526 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 13:26:29,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-20 13:26:29,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2022-03-20 13:26:29,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0227272727272727) internal successors, (180), 176 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2022-03-20 13:26:29,774 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 177 [2022-03-20 13:26:29,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:26:29,775 INFO L478 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2022-03-20 13:26:29,775 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 1.9659090909090908) internal successors, (173), 87 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:29,775 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2022-03-20 13:26:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-03-20 13:26:29,775 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:26:29,775 INFO L499 BasicCegarLoop]: trace histogram [84, 82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:26:29,792 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-03-20 13:26:29,976 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:29,976 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:26:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:26:29,976 INFO L85 PathProgramCache]: Analyzing trace with hash 773725731, now seen corresponding path program 82 times [2022-03-20 13:26:29,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:29,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2092101920] [2022-03-20 13:26:29,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:30,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:30,036 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:26:30,037 INFO L85 PathProgramCache]: Analyzing trace with hash -887948113, now seen corresponding path program 1 times [2022-03-20 13:26:30,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:26:30,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773860025] [2022-03-20 13:26:30,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:30,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:26:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:30,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:26:30,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:30,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:26:30,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773860025] [2022-03-20 13:26:30,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773860025] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:26:30,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841114492] [2022-03-20 13:26:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:30,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:30,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:26:30,114 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:26:30,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-20 13:26:30,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:26:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:26:30,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:30,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:26:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:30,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841114492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:26:30,417 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:26:30,417 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:26:33,890 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:26:33,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2092101920] [2022-03-20 13:26:33,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2092101920] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:26:33,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:26:33,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-03-20 13:26:33,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914782642] [2022-03-20 13:26:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:26:33,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-03-20 13:26:33,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-03-20 13:26:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=754, Invalid=9548, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 13:26:33,892 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:41,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:26:41,698 INFO L93 Difference]: Finished difference Result 190 states and 195 transitions. [2022-03-20 13:26:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-03-20 13:26:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-03-20 13:26:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:26:41,699 INFO L225 Difference]: With dead ends: 190 [2022-03-20 13:26:41,699 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 13:26:41,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 104 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5938 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=1687, Invalid=33095, Unknown=0, NotChecked=0, Total=34782 [2022-03-20 13:26:41,701 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 175 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 14470 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 14643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 14470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:26:41,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 213 Invalid, 14643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 14470 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-03-20 13:26:41,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 13:26:41,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2022-03-20 13:26:41,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0224719101123596) internal successors, (182), 178 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:41,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2022-03-20 13:26:41,712 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 179 [2022-03-20 13:26:41,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:26:41,712 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2022-03-20 13:26:41,712 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 1.9662921348314606) internal successors, (175), 88 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:41,713 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2022-03-20 13:26:41,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-03-20 13:26:41,713 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:26:41,713 INFO L499 BasicCegarLoop]: trace histogram [85, 83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:26:41,729 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-03-20 13:26:41,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-20 13:26:41,914 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:26:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:26:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash 757518142, now seen corresponding path program 83 times [2022-03-20 13:26:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:41,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1089670960] [2022-03-20 13:26:41,931 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:41,963 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:41,963 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:26:41,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1161584047, now seen corresponding path program 1 times [2022-03-20 13:26:41,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:26:41,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577741197] [2022-03-20 13:26:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:26:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:26:42,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:42,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:26:42,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577741197] [2022-03-20 13:26:42,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577741197] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:26:42,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691324370] [2022-03-20 13:26:42,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:42,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:42,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:26:42,031 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:26:42,031 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-20 13:26:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:42,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:26:42,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:26:42,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:42,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:26:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:42,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691324370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:26:42,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:26:42,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:26:45,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:26:45,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1089670960] [2022-03-20 13:26:45,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1089670960] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:26:45,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:26:45,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 13:26:45,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886108467] [2022-03-20 13:26:45,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:26:45,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 13:26:45,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:45,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 13:26:45,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=9744, Unknown=0, NotChecked=0, Total=10506 [2022-03-20 13:26:45,845 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:53,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:26:53,752 INFO L93 Difference]: Finished difference Result 192 states and 197 transitions. [2022-03-20 13:26:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 13:26:53,752 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-03-20 13:26:53,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:26:53,753 INFO L225 Difference]: With dead ends: 192 [2022-03-20 13:26:53,753 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 13:26:53,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 105 SyntacticMatches, 3 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6050 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=1706, Invalid=33826, Unknown=0, NotChecked=0, Total=35532 [2022-03-20 13:26:53,755 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 177 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 14565 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 14740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 14565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 13:26:53,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 103 Invalid, 14740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 14565 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 13:26:53,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 13:26:53,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-03-20 13:26:53,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-03-20 13:26:53,769 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 181 [2022-03-20 13:26:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:26:53,769 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-03-20 13:26:53,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 90 states have (on average 1.9666666666666666) internal successors, (177), 89 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:26:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-03-20 13:26:53,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-03-20 13:26:53,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:26:53,770 INFO L499 BasicCegarLoop]: trace histogram [86, 84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:26:53,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-03-20 13:26:53,983 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:53,983 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:26:53,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:26:53,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1933072999, now seen corresponding path program 84 times [2022-03-20 13:26:53,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:53,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1815238246] [2022-03-20 13:26:54,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:54,043 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:26:54,043 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:26:54,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1083851089, now seen corresponding path program 1 times [2022-03-20 13:26:54,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:26:54,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059769454] [2022-03-20 13:26:54,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:54,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:26:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:54,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:26:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:54,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:54,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:26:54,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059769454] [2022-03-20 13:26:54,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059769454] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:26:54,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243909895] [2022-03-20 13:26:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:26:54,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:26:54,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:26:54,112 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:26:54,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-20 13:26:54,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:26:54,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:26:54,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:26:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:54,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:26:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:26:54,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243909895] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:26:54,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:26:54,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:26:58,058 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:26:58,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1815238246] [2022-03-20 13:26:58,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1815238246] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:26:58,058 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:26:58,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-03-20 13:26:58,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546617817] [2022-03-20 13:26:58,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:26:58,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-03-20 13:26:58,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:26:58,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-03-20 13:26:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=770, Invalid=9942, Unknown=0, NotChecked=0, Total=10712 [2022-03-20 13:26:58,060 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:06,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:27:06,376 INFO L93 Difference]: Finished difference Result 194 states and 199 transitions. [2022-03-20 13:27:06,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-03-20 13:27:06,376 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-03-20 13:27:06,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:27:06,377 INFO L225 Difference]: With dead ends: 194 [2022-03-20 13:27:06,377 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 13:27:06,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6163 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1725, Invalid=34565, Unknown=0, NotChecked=0, Total=36290 [2022-03-20 13:27:06,379 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 179 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 15411 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 15588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 15411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:27:06,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 258 Invalid, 15588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 15411 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-20 13:27:06,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 13:27:06,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-03-20 13:27:06,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.021978021978022) internal successors, (186), 182 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:06,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2022-03-20 13:27:06,396 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 183 [2022-03-20 13:27:06,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:27:06,396 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2022-03-20 13:27:06,396 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.967032967032967) internal successors, (179), 90 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:06,396 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2022-03-20 13:27:06,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-03-20 13:27:06,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:27:06,397 INFO L499 BasicCegarLoop]: trace histogram [87, 85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:27:06,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-03-20 13:27:06,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:06,620 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:27:06,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:27:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2020847308, now seen corresponding path program 85 times [2022-03-20 13:27:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:06,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2107405080] [2022-03-20 13:27:06,644 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:06,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:06,691 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:27:06,691 INFO L85 PathProgramCache]: Analyzing trace with hash 965681071, now seen corresponding path program 1 times [2022-03-20 13:27:06,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:27:06,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577918451] [2022-03-20 13:27:06,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:06,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:27:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:06,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:27:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:06,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:06,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:27:06,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577918451] [2022-03-20 13:27:06,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577918451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:27:06,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646156451] [2022-03-20 13:27:06,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:06,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:06,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:27:06,769 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:27:06,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-20 13:27:06,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:06,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:27:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:27:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:06,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:27:07,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:07,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646156451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:27:07,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:27:07,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:27:10,816 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:27:10,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2107405080] [2022-03-20 13:27:10,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2107405080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:27:10,816 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:27:10,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 13:27:10,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810758997] [2022-03-20 13:27:10,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:27:10,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 13:27:10,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:10,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 13:27:10,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=778, Invalid=10142, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 13:27:10,818 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand has 93 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:19,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:27:19,090 INFO L93 Difference]: Finished difference Result 196 states and 201 transitions. [2022-03-20 13:27:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 13:27:19,090 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-03-20 13:27:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:27:19,091 INFO L225 Difference]: With dead ends: 196 [2022-03-20 13:27:19,091 INFO L226 Difference]: Without dead ends: 189 [2022-03-20 13:27:19,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6277 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1744, Invalid=35312, Unknown=0, NotChecked=0, Total=37056 [2022-03-20 13:27:19,092 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 181 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 15427 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 15606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 15427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:27:19,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 183 Invalid, 15606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 15427 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 13:27:19,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-03-20 13:27:19,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-03-20 13:27:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0217391304347827) internal successors, (188), 184 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2022-03-20 13:27:19,103 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 185 [2022-03-20 13:27:19,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:27:19,103 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2022-03-20 13:27:19,103 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 92 states have (on average 1.9673913043478262) internal successors, (181), 91 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:19,103 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2022-03-20 13:27:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-03-20 13:27:19,104 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:27:19,104 INFO L499 BasicCegarLoop]: trace histogram [88, 86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:27:19,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-20 13:27:19,305 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-03-20 13:27:19,305 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:27:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:27:19,305 INFO L85 PathProgramCache]: Analyzing trace with hash -472612337, now seen corresponding path program 86 times [2022-03-20 13:27:19,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:19,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1258564222] [2022-03-20 13:27:19,328 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:19,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:19,359 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:27:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1279754065, now seen corresponding path program 1 times [2022-03-20 13:27:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:27:19,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843310495] [2022-03-20 13:27:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:27:19,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:19,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:27:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:19,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:27:19,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843310495] [2022-03-20 13:27:19,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843310495] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:27:19,420 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210875481] [2022-03-20 13:27:19,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:19,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:19,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:27:19,421 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:27:19,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-20 13:27:19,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:19,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:27:19,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:27:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:19,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:27:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:19,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210875481] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:27:19,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:27:19,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:27:23,493 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:27:23,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1258564222] [2022-03-20 13:27:23,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1258564222] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:27:23,493 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:27:23,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-03-20 13:27:23,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574108319] [2022-03-20 13:27:23,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:27:23,494 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-03-20 13:27:23,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:23,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-03-20 13:27:23,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=10344, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 13:27:23,495 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:32,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:27:32,005 INFO L93 Difference]: Finished difference Result 198 states and 203 transitions. [2022-03-20 13:27:32,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-03-20 13:27:32,005 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-03-20 13:27:32,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:27:32,006 INFO L225 Difference]: With dead ends: 198 [2022-03-20 13:27:32,006 INFO L226 Difference]: Without dead ends: 191 [2022-03-20 13:27:32,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6392 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1763, Invalid=36067, Unknown=0, NotChecked=0, Total=37830 [2022-03-20 13:27:32,008 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 183 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 15743 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 15924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 15743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-20 13:27:32,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 168 Invalid, 15924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 15743 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-20 13:27:32,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-03-20 13:27:32,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-03-20 13:27:32,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.021505376344086) internal successors, (190), 186 states have internal predecessors, (190), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:32,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2022-03-20 13:27:32,018 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 187 [2022-03-20 13:27:32,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:27:32,018 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2022-03-20 13:27:32,019 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 1.967741935483871) internal successors, (183), 92 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:32,019 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2022-03-20 13:27:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-03-20 13:27:32,019 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:27:32,019 INFO L499 BasicCegarLoop]: trace histogram [89, 87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:27:32,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-03-20 13:27:32,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:32,220 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:27:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:27:32,220 INFO L85 PathProgramCache]: Analyzing trace with hash 1322510378, now seen corresponding path program 87 times [2022-03-20 13:27:32,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:32,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783904884] [2022-03-20 13:27:32,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:32,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:32,284 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:27:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash 769778095, now seen corresponding path program 1 times [2022-03-20 13:27:32,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:27:32,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522000444] [2022-03-20 13:27:32,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:32,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:27:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:32,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:27:32,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:32,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:32,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:27:32,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522000444] [2022-03-20 13:27:32,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522000444] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:27:32,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256348642] [2022-03-20 13:27:32,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:32,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:32,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:27:32,360 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:27:32,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-20 13:27:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:32,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:27:32,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:27:32,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:32,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:27:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:32,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256348642] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:27:32,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:27:32,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:27:36,609 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:27:36,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783904884] [2022-03-20 13:27:36,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783904884] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:27:36,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:27:36,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 13:27:36,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774138271] [2022-03-20 13:27:36,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:27:36,610 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 13:27:36,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:36,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 13:27:36,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=888, Invalid=10668, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 13:27:36,611 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:45,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:27:45,457 INFO L93 Difference]: Finished difference Result 200 states and 205 transitions. [2022-03-20 13:27:45,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 13:27:45,457 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-03-20 13:27:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:27:45,458 INFO L225 Difference]: With dead ends: 200 [2022-03-20 13:27:45,458 INFO L226 Difference]: Without dead ends: 193 [2022-03-20 13:27:45,460 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6691 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1964, Invalid=37042, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 13:27:45,460 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 185 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 16816 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 16999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 16816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 13:27:45,460 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 418 Invalid, 16999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 16816 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-20 13:27:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-03-20 13:27:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2022-03-20 13:27:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0212765957446808) internal successors, (192), 188 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:45,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2022-03-20 13:27:45,471 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 189 [2022-03-20 13:27:45,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:27:45,471 INFO L478 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2022-03-20 13:27:45,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.9680851063829787) internal successors, (185), 93 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:45,471 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2022-03-20 13:27:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-20 13:27:45,471 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:27:45,472 INFO L499 BasicCegarLoop]: trace histogram [90, 88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:27:45,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-20 13:27:45,672 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:45,672 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:27:45,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:27:45,672 INFO L85 PathProgramCache]: Analyzing trace with hash -141413499, now seen corresponding path program 88 times [2022-03-20 13:27:45,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:45,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1834393736] [2022-03-20 13:27:45,689 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:45,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:45,720 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:27:45,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1475657041, now seen corresponding path program 1 times [2022-03-20 13:27:45,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:27:45,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749192912] [2022-03-20 13:27:45,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:45,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:27:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:27:45,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:45,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:27:45,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749192912] [2022-03-20 13:27:45,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749192912] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:27:45,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927757586] [2022-03-20 13:27:45,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:45,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:45,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:27:45,772 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:27:45,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-20 13:27:45,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:45,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:27:45,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:27:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:45,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:27:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:46,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927757586] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:27:46,062 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:27:46,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:27:49,946 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:27:49,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1834393736] [2022-03-20 13:27:49,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1834393736] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:27:49,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:27:49,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-03-20 13:27:49,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383583262] [2022-03-20 13:27:49,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:27:49,947 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-03-20 13:27:49,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:49,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-03-20 13:27:49,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=802, Invalid=10754, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 13:27:49,948 INFO L87 Difference]: Start difference. First operand 193 states and 196 transitions. Second operand has 96 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:58,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:27:58,779 INFO L93 Difference]: Finished difference Result 202 states and 207 transitions. [2022-03-20 13:27:58,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-20 13:27:58,779 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-03-20 13:27:58,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:27:58,780 INFO L225 Difference]: With dead ends: 202 [2022-03-20 13:27:58,780 INFO L226 Difference]: Without dead ends: 195 [2022-03-20 13:27:58,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6625 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1801, Invalid=37601, Unknown=0, NotChecked=0, Total=39402 [2022-03-20 13:27:58,782 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 187 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 16541 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 16726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 16541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:27:58,782 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 208 Invalid, 16726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 16541 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 13:27:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-20 13:27:58,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-03-20 13:27:58,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:58,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-03-20 13:27:58,801 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 191 [2022-03-20 13:27:58,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:27:58,801 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-03-20 13:27:58,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.9684210526315788) internal successors, (187), 94 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:27:58,801 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-03-20 13:27:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-03-20 13:27:58,802 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:27:58,802 INFO L499 BasicCegarLoop]: trace histogram [91, 89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:27:58,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-03-20 13:27:59,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:59,003 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:27:59,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:27:59,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1777013792, now seen corresponding path program 89 times [2022-03-20 13:27:59,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:27:59,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1242703783] [2022-03-20 13:27:59,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:59,059 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:27:59,059 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:27:59,060 INFO L85 PathProgramCache]: Analyzing trace with hash 573875119, now seen corresponding path program 1 times [2022-03-20 13:27:59,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:27:59,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115580636] [2022-03-20 13:27:59,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:59,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:27:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:59,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:27:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:59,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:27:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115580636] [2022-03-20 13:27:59,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115580636] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:27:59,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329047571] [2022-03-20 13:27:59,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:27:59,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:27:59,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:27:59,118 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:27:59,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-20 13:27:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:27:59,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:27:59,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:27:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:59,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:27:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:27:59,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329047571] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:27:59,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:27:59,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:28:03,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:28:03,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1242703783] [2022-03-20 13:28:03,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1242703783] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:28:03,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:28:03,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 13:28:03,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825663816] [2022-03-20 13:28:03,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:28:03,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 13:28:03,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:03,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 13:28:03,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=810, Invalid=10962, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 13:28:03,353 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 97 states, 96 states have (on average 1.96875) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:12,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:28:12,391 INFO L93 Difference]: Finished difference Result 204 states and 209 transitions. [2022-03-20 13:28:12,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 13:28:12,391 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 96 states have (on average 1.96875) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-03-20 13:28:12,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:28:12,392 INFO L225 Difference]: With dead ends: 204 [2022-03-20 13:28:12,392 INFO L226 Difference]: Without dead ends: 197 [2022-03-20 13:28:12,393 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6743 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1820, Invalid=38380, Unknown=0, NotChecked=0, Total=40200 [2022-03-20 13:28:12,394 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 189 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 17144 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 17331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 17144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:28:12,394 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 318 Invalid, 17331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 17144 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-03-20 13:28:12,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-20 13:28:12,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-03-20 13:28:12,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0208333333333333) internal successors, (196), 192 states have internal predecessors, (196), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:12,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2022-03-20 13:28:12,410 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 193 [2022-03-20 13:28:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:28:12,410 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2022-03-20 13:28:12,411 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 96 states have (on average 1.96875) internal successors, (189), 95 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2022-03-20 13:28:12,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-03-20 13:28:12,411 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:28:12,412 INFO L499 BasicCegarLoop]: trace histogram [92, 90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:28:12,429 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-20 13:28:12,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-20 13:28:12,619 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:28:12,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:28:12,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1450296837, now seen corresponding path program 90 times [2022-03-20 13:28:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:12,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768237977] [2022-03-20 13:28:12,642 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:12,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:12,684 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:28:12,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1671560017, now seen corresponding path program 1 times [2022-03-20 13:28:12,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:28:12,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733095936] [2022-03-20 13:28:12,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:12,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:28:12,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:12,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:28:12,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:12,757 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:12,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:28:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733095936] [2022-03-20 13:28:12,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733095936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:28:12,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665398514] [2022-03-20 13:28:12,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:12,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:12,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:28:12,759 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:28:12,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-20 13:28:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:12,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:28:12,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:28:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:12,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:28:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:13,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665398514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:28:13,143 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:28:13,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:28:17,179 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:28:17,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768237977] [2022-03-20 13:28:17,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768237977] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:28:17,179 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:28:17,179 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-03-20 13:28:17,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335071603] [2022-03-20 13:28:17,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:28:17,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-20 13:28:17,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:17,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-20 13:28:17,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=915, Invalid=11295, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 13:28:17,181 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand has 98 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:28:26,353 INFO L93 Difference]: Finished difference Result 206 states and 211 transitions. [2022-03-20 13:28:26,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-03-20 13:28:26,353 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-03-20 13:28:26,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:28:26,354 INFO L225 Difference]: With dead ends: 206 [2022-03-20 13:28:26,354 INFO L226 Difference]: Without dead ends: 199 [2022-03-20 13:28:26,356 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7051 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2027, Invalid=39385, Unknown=0, NotChecked=0, Total=41412 [2022-03-20 13:28:26,356 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 191 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 17399 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 17588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 17399 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:28:26,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 268 Invalid, 17588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 17399 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-03-20 13:28:26,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-03-20 13:28:26,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-03-20 13:28:26,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0206185567010309) internal successors, (198), 194 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:26,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 202 transitions. [2022-03-20 13:28:26,375 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 202 transitions. Word has length 195 [2022-03-20 13:28:26,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:28:26,375 INFO L478 AbstractCegarLoop]: Abstraction has 199 states and 202 transitions. [2022-03-20 13:28:26,375 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.9690721649484537) internal successors, (191), 96 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:26,376 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 202 transitions. [2022-03-20 13:28:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-03-20 13:28:26,376 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:28:26,376 INFO L499 BasicCegarLoop]: trace histogram [93, 91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:28:26,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-03-20 13:28:26,597 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:26,598 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:28:26,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:28:26,598 INFO L85 PathProgramCache]: Analyzing trace with hash -1929423594, now seen corresponding path program 91 times [2022-03-20 13:28:26,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:26,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [835935907] [2022-03-20 13:28:26,615 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:26,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:26,663 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:28:26,663 INFO L85 PathProgramCache]: Analyzing trace with hash 377972143, now seen corresponding path program 1 times [2022-03-20 13:28:26,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:28:26,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695179612] [2022-03-20 13:28:26,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:26,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:28:26,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:26,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:28:26,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:26,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:26,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:28:26,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695179612] [2022-03-20 13:28:26,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695179612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:28:26,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170662583] [2022-03-20 13:28:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:26,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:26,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:28:26,723 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:28:26,723 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-20 13:28:26,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:28:26,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:28:26,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:26,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:28:27,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:27,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170662583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:28:27,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:28:27,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:28:31,130 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:28:31,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [835935907] [2022-03-20 13:28:31,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [835935907] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:28:31,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:28:31,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 13:28:31,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861442302] [2022-03-20 13:28:31,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:28:31,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 13:28:31,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:31,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 13:28:31,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=826, Invalid=11384, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 13:28:31,132 INFO L87 Difference]: Start difference. First operand 199 states and 202 transitions. Second operand has 99 states, 98 states have (on average 1.969387755102041) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:40,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:28:40,566 INFO L93 Difference]: Finished difference Result 208 states and 213 transitions. [2022-03-20 13:28:40,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 13:28:40,566 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 98 states have (on average 1.969387755102041) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-03-20 13:28:40,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:28:40,567 INFO L225 Difference]: With dead ends: 208 [2022-03-20 13:28:40,567 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 13:28:40,569 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 113 SyntacticMatches, 3 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6982 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=1858, Invalid=39962, Unknown=0, NotChecked=0, Total=41820 [2022-03-20 13:28:40,570 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 193 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 17858 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 18049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 17858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:28:40,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 228 Invalid, 18049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 17858 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-20 13:28:40,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 13:28:40,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2022-03-20 13:28:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0204081632653061) internal successors, (200), 196 states have internal predecessors, (200), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 204 transitions. [2022-03-20 13:28:40,588 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 204 transitions. Word has length 197 [2022-03-20 13:28:40,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:28:40,588 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 204 transitions. [2022-03-20 13:28:40,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 98 states have (on average 1.969387755102041) internal successors, (193), 97 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:40,588 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 204 transitions. [2022-03-20 13:28:40,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-03-20 13:28:40,589 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:28:40,589 INFO L499 BasicCegarLoop]: trace histogram [94, 92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:28:40,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-03-20 13:28:40,807 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:40,807 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:28:40,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:28:40,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1486230897, now seen corresponding path program 92 times [2022-03-20 13:28:40,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:40,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1655388765] [2022-03-20 13:28:40,831 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:40,864 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:40,865 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:28:40,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1867462993, now seen corresponding path program 1 times [2022-03-20 13:28:40,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:28:40,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256247234] [2022-03-20 13:28:40,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:40,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:28:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:40,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:28:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:40,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:40,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:28:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256247234] [2022-03-20 13:28:40,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256247234] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:28:40,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267609716] [2022-03-20 13:28:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:40,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:40,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:28:40,920 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:28:40,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-20 13:28:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:40,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:28:40,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:28:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:41,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:28:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:41,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267609716] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:28:41,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:28:41,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:28:45,584 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:28:45,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1655388765] [2022-03-20 13:28:45,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1655388765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:28:45,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:28:45,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-03-20 13:28:45,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155784419] [2022-03-20 13:28:45,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:28:45,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-03-20 13:28:45,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:45,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-03-20 13:28:45,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=834, Invalid=11598, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 13:28:45,585 INFO L87 Difference]: Start difference. First operand 201 states and 204 transitions. Second operand has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:55,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:28:55,288 INFO L93 Difference]: Finished difference Result 210 states and 215 transitions. [2022-03-20 13:28:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-03-20 13:28:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-03-20 13:28:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:28:55,289 INFO L225 Difference]: With dead ends: 210 [2022-03-20 13:28:55,289 INFO L226 Difference]: Without dead ends: 203 [2022-03-20 13:28:55,291 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 114 SyntacticMatches, 3 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7103 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1877, Invalid=40765, Unknown=0, NotChecked=0, Total=42642 [2022-03-20 13:28:55,291 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 195 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 18662 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 18855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 18662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-03-20 13:28:55,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 423 Invalid, 18855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 18662 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-03-20 13:28:55,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-20 13:28:55,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 203. [2022-03-20 13:28:55,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.02020202020202) internal successors, (202), 198 states have internal predecessors, (202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:55,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 206 transitions. [2022-03-20 13:28:55,303 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 206 transitions. Word has length 199 [2022-03-20 13:28:55,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:28:55,303 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 206 transitions. [2022-03-20 13:28:55,303 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 98 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:28:55,303 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 206 transitions. [2022-03-20 13:28:55,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-03-20 13:28:55,304 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:28:55,304 INFO L499 BasicCegarLoop]: trace histogram [95, 93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:28:55,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-20 13:28:55,504 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:55,504 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:28:55,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:28:55,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1719784692, now seen corresponding path program 93 times [2022-03-20 13:28:55,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:28:55,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145315749] [2022-03-20 13:28:55,522 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:55,553 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:28:55,553 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:28:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash 182069167, now seen corresponding path program 1 times [2022-03-20 13:28:55,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:28:55,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38536335] [2022-03-20 13:28:55,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:55,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:28:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:55,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:28:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:55,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:28:55,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38536335] [2022-03-20 13:28:55,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38536335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:28:55,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323351518] [2022-03-20 13:28:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:28:55,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:28:55,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:28:55,623 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:28:55,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-20 13:28:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:28:55,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:28:55,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:28:55,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:55,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:28:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:28:55,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323351518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:28:55,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:28:55,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2022-03-20 13:29:00,216 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:00,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145315749] [2022-03-20 13:29:00,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145315749] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:00,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:00,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 13:29:00,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249083785] [2022-03-20 13:29:00,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:00,216 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 13:29:00,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:00,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 13:29:00,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=735, Invalid=11697, Unknown=0, NotChecked=0, Total=12432 [2022-03-20 13:29:00,218 INFO L87 Difference]: Start difference. First operand 203 states and 206 transitions. Second operand has 101 states, 100 states have (on average 1.97) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:10,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:10,072 INFO L93 Difference]: Finished difference Result 212 states and 217 transitions. [2022-03-20 13:29:10,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 13:29:10,073 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 1.97) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-03-20 13:29:10,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:10,074 INFO L225 Difference]: With dead ends: 212 [2022-03-20 13:29:10,074 INFO L226 Difference]: Without dead ends: 205 [2022-03-20 13:29:10,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 115 SyntacticMatches, 4 SemanticMatches, 206 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7024 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1693, Invalid=41363, Unknown=0, NotChecked=0, Total=43056 [2022-03-20 13:29:10,076 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 197 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 18793 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 18988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 18793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:10,076 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 393 Invalid, 18988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 18793 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-20 13:29:10,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-03-20 13:29:10,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-03-20 13:29:10,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:10,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-03-20 13:29:10,088 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 201 [2022-03-20 13:29:10,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:10,088 INFO L478 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-03-20 13:29:10,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 1.97) internal successors, (197), 99 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:10,088 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-03-20 13:29:10,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-03-20 13:29:10,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:10,089 INFO L499 BasicCegarLoop]: trace histogram [96, 94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:10,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-20 13:29:10,289 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:10,289 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:10,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:10,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1085752807, now seen corresponding path program 94 times [2022-03-20 13:29:10,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:10,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [37872804] [2022-03-20 13:29:10,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:10,338 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:10,338 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:10,338 INFO L85 PathProgramCache]: Analyzing trace with hash -2063365969, now seen corresponding path program 1 times [2022-03-20 13:29:10,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:10,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012704315] [2022-03-20 13:29:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:10,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:10,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:29:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:10,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:10,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012704315] [2022-03-20 13:29:10,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012704315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:29:10,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506956584] [2022-03-20 13:29:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:10,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:10,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:10,412 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:29:10,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-20 13:29:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:10,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:29:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:10,550 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:10,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:10,678 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:10,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506956584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:10,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:29:10,679 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:29:15,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:15,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [37872804] [2022-03-20 13:29:15,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [37872804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:15,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:15,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-03-20 13:29:15,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135427309] [2022-03-20 13:29:15,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:15,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-03-20 13:29:15,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:15,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-03-20 13:29:15,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=850, Invalid=12032, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 13:29:15,048 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 102 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:25,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:25,201 INFO L93 Difference]: Finished difference Result 214 states and 219 transitions. [2022-03-20 13:29:25,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-03-20 13:29:25,202 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-03-20 13:29:25,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:25,202 INFO L225 Difference]: With dead ends: 214 [2022-03-20 13:29:25,202 INFO L226 Difference]: Without dead ends: 207 [2022-03-20 13:29:25,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7348 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1915, Invalid=42395, Unknown=0, NotChecked=0, Total=44310 [2022-03-20 13:29:25,204 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 199 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 19523 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 19720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 19523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:25,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 468 Invalid, 19720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 19523 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 13:29:25,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-20 13:29:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2022-03-20 13:29:25,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.0198019801980198) internal successors, (206), 202 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:25,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2022-03-20 13:29:25,222 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 203 [2022-03-20 13:29:25,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:25,222 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2022-03-20 13:29:25,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 1.9702970297029703) internal successors, (199), 100 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:25,222 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2022-03-20 13:29:25,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-20 13:29:25,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:25,223 INFO L499 BasicCegarLoop]: trace histogram [97, 95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:25,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-03-20 13:29:25,445 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-03-20 13:29:25,446 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:25,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:25,446 INFO L85 PathProgramCache]: Analyzing trace with hash -32172542, now seen corresponding path program 95 times [2022-03-20 13:29:25,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:25,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717607557] [2022-03-20 13:29:25,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:25,511 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:25,511 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:25,512 INFO L85 PathProgramCache]: Analyzing trace with hash -13833809, now seen corresponding path program 1 times [2022-03-20 13:29:25,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:25,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664109614] [2022-03-20 13:29:25,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:25,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:25,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:29:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:25,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664109614] [2022-03-20 13:29:25,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664109614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:29:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388108997] [2022-03-20 13:29:25,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:25,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:25,583 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:29:25,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-20 13:29:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:25,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:29:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:25,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:25,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:25,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388108997] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:25,852 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:29:25,852 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:29:30,271 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:30,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717607557] [2022-03-20 13:29:30,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717607557] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:30,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:30,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-03-20 13:29:30,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732471020] [2022-03-20 13:29:30,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:30,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-03-20 13:29:30,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:30,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-03-20 13:29:30,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=858, Invalid=12252, Unknown=0, NotChecked=0, Total=13110 [2022-03-20 13:29:30,273 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand has 103 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:40,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:40,433 INFO L93 Difference]: Finished difference Result 216 states and 221 transitions. [2022-03-20 13:29:40,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-03-20 13:29:40,434 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-03-20 13:29:40,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:40,434 INFO L225 Difference]: With dead ends: 216 [2022-03-20 13:29:40,434 INFO L226 Difference]: Without dead ends: 209 [2022-03-20 13:29:40,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 117 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7472 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1934, Invalid=43222, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 13:29:40,436 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 19393 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 19592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 19393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:40,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 233 Invalid, 19592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 19393 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 13:29:40,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-20 13:29:40,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2022-03-20 13:29:40,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0196078431372548) internal successors, (208), 204 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:40,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 212 transitions. [2022-03-20 13:29:40,449 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 212 transitions. Word has length 205 [2022-03-20 13:29:40,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:40,449 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 212 transitions. [2022-03-20 13:29:40,449 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 102 states have (on average 1.9705882352941178) internal successors, (201), 101 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:40,449 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 212 transitions. [2022-03-20 13:29:40,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-03-20 13:29:40,450 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:40,450 INFO L499 BasicCegarLoop]: trace histogram [98, 96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:40,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-20 13:29:40,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-20 13:29:40,651 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:40,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:40,651 INFO L85 PathProgramCache]: Analyzing trace with hash -616608931, now seen corresponding path program 96 times [2022-03-20 13:29:40,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:40,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1838373434] [2022-03-20 13:29:40,676 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:40,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:40,719 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:40,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2035698351, now seen corresponding path program 1 times [2022-03-20 13:29:40,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:40,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244580761] [2022-03-20 13:29:40,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:40,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:40,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:29:40,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:40,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244580761] [2022-03-20 13:29:40,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244580761] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:29:40,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997468576] [2022-03-20 13:29:40,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:40,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:40,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:40,788 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:29:40,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-20 13:29:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:40,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:29:40,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:40,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:41,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997468576] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:41,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:29:41,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:29:45,564 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:29:45,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1838373434] [2022-03-20 13:29:45,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1838373434] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:29:45,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:29:45,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-20 13:29:45,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904332483] [2022-03-20 13:29:45,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:29:45,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 13:29:45,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:45,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 13:29:45,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=866, Invalid=12474, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 13:29:45,566 INFO L87 Difference]: Start difference. First operand 209 states and 212 transitions. Second operand has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:55,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:29:55,908 INFO L93 Difference]: Finished difference Result 218 states and 223 transitions. [2022-03-20 13:29:55,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-03-20 13:29:55,908 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-03-20 13:29:55,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:29:55,909 INFO L225 Difference]: With dead ends: 218 [2022-03-20 13:29:55,909 INFO L226 Difference]: Without dead ends: 211 [2022-03-20 13:29:55,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7597 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1953, Invalid=44057, Unknown=0, NotChecked=0, Total=46010 [2022-03-20 13:29:55,911 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 203 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 19619 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 19820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 19619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 13:29:55,911 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 158 Invalid, 19820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 19619 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 13:29:55,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-03-20 13:29:55,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2022-03-20 13:29:55,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0194174757281553) internal successors, (210), 206 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:55,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 214 transitions. [2022-03-20 13:29:55,923 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 214 transitions. Word has length 207 [2022-03-20 13:29:55,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:29:55,923 INFO L478 AbstractCegarLoop]: Abstraction has 211 states and 214 transitions. [2022-03-20 13:29:55,923 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 1.970873786407767) internal successors, (203), 102 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:29:55,924 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 214 transitions. [2022-03-20 13:29:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-03-20 13:29:55,924 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:29:55,924 INFO L499 BasicCegarLoop]: trace histogram [99, 97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:29:55,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-03-20 13:29:56,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:56,130 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:29:56,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:29:56,130 INFO L85 PathProgramCache]: Analyzing trace with hash 380737016, now seen corresponding path program 97 times [2022-03-20 13:29:56,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:29:56,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305954432] [2022-03-20 13:29:56,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:56,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:29:56,198 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:29:56,199 INFO L85 PathProgramCache]: Analyzing trace with hash -209736785, now seen corresponding path program 1 times [2022-03-20 13:29:56,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:29:56,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415533681] [2022-03-20 13:29:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:56,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:29:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:56,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:29:56,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:56,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:29:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415533681] [2022-03-20 13:29:56,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415533681] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:29:56,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939152046] [2022-03-20 13:29:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:29:56,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:29:56,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:29:56,260 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:29:56,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-20 13:29:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:29:56,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:29:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:29:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:56,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:29:56,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:29:56,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939152046] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:29:56,571 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:29:56,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:30:01,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305954432] [2022-03-20 13:30:01,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305954432] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:01,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:01,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-20 13:30:01,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634581820] [2022-03-20 13:30:01,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:01,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 13:30:01,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:01,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 13:30:01,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=874, Invalid=12698, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 13:30:01,189 INFO L87 Difference]: Start difference. First operand 211 states and 214 transitions. Second operand has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:11,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:11,766 INFO L93 Difference]: Finished difference Result 220 states and 225 transitions. [2022-03-20 13:30:11,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 13:30:11,767 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-03-20 13:30:11,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:11,768 INFO L225 Difference]: With dead ends: 220 [2022-03-20 13:30:11,768 INFO L226 Difference]: Without dead ends: 213 [2022-03-20 13:30:11,770 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 119 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7723 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1972, Invalid=44900, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 13:30:11,770 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 205 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 19758 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 19961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 19758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:11,770 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 128 Invalid, 19961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 19758 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-20 13:30:11,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-20 13:30:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 213. [2022-03-20 13:30:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0192307692307692) internal successors, (212), 208 states have internal predecessors, (212), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:11,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 216 transitions. [2022-03-20 13:30:11,791 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 216 transitions. Word has length 209 [2022-03-20 13:30:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:11,791 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 216 transitions. [2022-03-20 13:30:11,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 1.9711538461538463) internal successors, (205), 103 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 216 transitions. [2022-03-20 13:30:11,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-03-20 13:30:11,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:11,792 INFO L499 BasicCegarLoop]: trace histogram [100, 98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:11,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-20 13:30:12,010 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:12,011 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:12,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:12,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1052485075, now seen corresponding path program 98 times [2022-03-20 13:30:12,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:12,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2057822266] [2022-03-20 13:30:12,039 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:30:12,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:30:12,094 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:12,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1839795375, now seen corresponding path program 1 times [2022-03-20 13:30:12,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:12,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231401539] [2022-03-20 13:30:12,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:12,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:12,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:12,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:30:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:12,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231401539] [2022-03-20 13:30:12,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231401539] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:30:12,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939006768] [2022-03-20 13:30:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:12,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:12,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:12,161 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:30:12,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-20 13:30:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:12,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:30:12,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:12,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:12,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939006768] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:12,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:30:12,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:30:17,152 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:17,152 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2057822266] [2022-03-20 13:30:17,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2057822266] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:17,152 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:17,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-03-20 13:30:17,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697947410] [2022-03-20 13:30:17,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:17,152 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-03-20 13:30:17,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:17,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-03-20 13:30:17,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=882, Invalid=12924, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 13:30:17,154 INFO L87 Difference]: Start difference. First operand 213 states and 216 transitions. Second operand has 106 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:28,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:28,001 INFO L93 Difference]: Finished difference Result 222 states and 227 transitions. [2022-03-20 13:30:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 13:30:28,001 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-03-20 13:30:28,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:28,002 INFO L225 Difference]: With dead ends: 222 [2022-03-20 13:30:28,002 INFO L226 Difference]: Without dead ends: 215 [2022-03-20 13:30:28,004 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 120 SyntacticMatches, 3 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7850 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1991, Invalid=45751, Unknown=0, NotChecked=0, Total=47742 [2022-03-20 13:30:28,005 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 207 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 20694 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 20899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 20694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:28,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 373 Invalid, 20899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 20694 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-20 13:30:28,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-03-20 13:30:28,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-03-20 13:30:28,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-03-20 13:30:28,017 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 211 [2022-03-20 13:30:28,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:28,017 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-03-20 13:30:28,017 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.9714285714285715) internal successors, (207), 104 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:28,017 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-03-20 13:30:28,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-03-20 13:30:28,018 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:28,018 INFO L499 BasicCegarLoop]: trace histogram [101, 99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:28,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-20 13:30:28,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-20 13:30:28,219 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:28,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1937691922, now seen corresponding path program 99 times [2022-03-20 13:30:28,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:28,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [42273051] [2022-03-20 13:30:28,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:30:28,280 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:30:28,280 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:28,280 INFO L85 PathProgramCache]: Analyzing trace with hash -405639761, now seen corresponding path program 1 times [2022-03-20 13:30:28,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:28,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033032998] [2022-03-20 13:30:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:28,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:28,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:28,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:30:28,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:28,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:28,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033032998] [2022-03-20 13:30:28,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033032998] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:30:28,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416584962] [2022-03-20 13:30:28,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:28,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:28,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:28,356 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:30:28,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-20 13:30:28,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:30:28,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:28,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:28,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416584962] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:28,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:30:28,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:30:33,423 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:33,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [42273051] [2022-03-20 13:30:33,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [42273051] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:33,423 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:33,423 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-20 13:30:33,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417255419] [2022-03-20 13:30:33,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:33,424 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-20 13:30:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:33,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-20 13:30:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=890, Invalid=13152, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 13:30:33,425 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 107 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:30:44,270 INFO L93 Difference]: Finished difference Result 224 states and 229 transitions. [2022-03-20 13:30:44,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-20 13:30:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-03-20 13:30:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:30:44,274 INFO L225 Difference]: With dead ends: 224 [2022-03-20 13:30:44,274 INFO L226 Difference]: Without dead ends: 217 [2022-03-20 13:30:44,275 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 121 SyntacticMatches, 3 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7978 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=2010, Invalid=46610, Unknown=0, NotChecked=0, Total=48620 [2022-03-20 13:30:44,276 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 209 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 20490 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 20697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 20490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-03-20 13:30:44,276 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 98 Invalid, 20697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 20490 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-03-20 13:30:44,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-03-20 13:30:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-03-20 13:30:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0188679245283019) internal successors, (216), 212 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2022-03-20 13:30:44,290 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 213 [2022-03-20 13:30:44,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:30:44,290 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2022-03-20 13:30:44,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.971698113207547) internal successors, (209), 105 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:30:44,290 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2022-03-20 13:30:44,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-03-20 13:30:44,291 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:30:44,291 INFO L499 BasicCegarLoop]: trace histogram [102, 100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:30:44,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-20 13:30:44,494 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:44,494 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:30:44,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:30:44,495 INFO L85 PathProgramCache]: Analyzing trace with hash 2130302281, now seen corresponding path program 100 times [2022-03-20 13:30:44,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:44,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2009330166] [2022-03-20 13:30:44,518 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:30:44,559 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:30:44,559 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:30:44,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1643892399, now seen corresponding path program 1 times [2022-03-20 13:30:44,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:30:44,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070004240] [2022-03-20 13:30:44,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:44,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:30:44,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:44,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:30:44,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:44,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:30:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070004240] [2022-03-20 13:30:44,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070004240] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:30:44,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372431438] [2022-03-20 13:30:44,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:30:44,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:30:44,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:30:44,636 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:30:44,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-20 13:30:44,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:30:44,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:30:44,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:30:44,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:44,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:30:45,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:30:45,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372431438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:30:45,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:30:45,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-20 13:30:49,933 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:30:49,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2009330166] [2022-03-20 13:30:49,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2009330166] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:30:49,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:30:49,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-03-20 13:30:49,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903254205] [2022-03-20 13:30:49,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:30:49,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-03-20 13:30:49,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:30:49,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-03-20 13:30:49,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1005, Invalid=13515, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 13:30:49,934 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand has 108 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:31:01,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:01,104 INFO L93 Difference]: Finished difference Result 226 states and 231 transitions. [2022-03-20 13:31:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-20 13:31:01,104 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-03-20 13:31:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:01,105 INFO L225 Difference]: With dead ends: 226 [2022-03-20 13:31:01,105 INFO L226 Difference]: Without dead ends: 219 [2022-03-20 13:31:01,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8316 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=2237, Invalid=47715, Unknown=0, NotChecked=0, Total=49952 [2022-03-20 13:31:01,107 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 211 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 21170 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 21379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 21170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:01,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 223 Invalid, 21379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 21170 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-03-20 13:31:01,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-03-20 13:31:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 219. [2022-03-20 13:31:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0186915887850467) internal successors, (218), 214 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:31:01,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 222 transitions. [2022-03-20 13:31:01,119 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 222 transitions. Word has length 215 [2022-03-20 13:31:01,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:01,119 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 222 transitions. [2022-03-20 13:31:01,119 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 1.97196261682243) internal successors, (211), 106 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:31:01,120 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 222 transitions. [2022-03-20 13:31:01,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-03-20 13:31:01,120 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:01,120 INFO L499 BasicCegarLoop]: trace histogram [103, 101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:01,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-20 13:31:01,321 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-20 13:31:01,321 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:01,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:01,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1242475292, now seen corresponding path program 101 times [2022-03-20 13:31:01,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:01,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [44185655] [2022-03-20 13:31:01,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:31:01,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:31:01,380 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:01,380 INFO L85 PathProgramCache]: Analyzing trace with hash -601542737, now seen corresponding path program 1 times [2022-03-20 13:31:01,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:01,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205032521] [2022-03-20 13:31:01,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:01,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:01,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:31:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:31:01,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205032521] [2022-03-20 13:31:01,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205032521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:31:01,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233840170] [2022-03-20 13:31:01,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:01,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:01,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:01,445 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:31:01,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-20 13:31:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:31:01,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:31:01,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:31:01,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233840170] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:01,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:31:01,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:31:06,669 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:06,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [44185655] [2022-03-20 13:31:06,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [44185655] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:06,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:06,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-20 13:31:06,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307228218] [2022-03-20 13:31:06,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:06,670 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-20 13:31:06,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:06,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-20 13:31:06,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=906, Invalid=13614, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 13:31:06,671 INFO L87 Difference]: Start difference. First operand 219 states and 222 transitions. Second operand has 109 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:31:18,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 13:31:18,249 INFO L93 Difference]: Finished difference Result 228 states and 233 transitions. [2022-03-20 13:31:18,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-20 13:31:18,249 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-03-20 13:31:18,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 13:31:18,250 INFO L225 Difference]: With dead ends: 228 [2022-03-20 13:31:18,250 INFO L226 Difference]: Without dead ends: 221 [2022-03-20 13:31:18,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8237 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=2048, Invalid=48352, Unknown=0, NotChecked=0, Total=50400 [2022-03-20 13:31:18,251 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 213 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 21931 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 22142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 21931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-03-20 13:31:18,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 293 Invalid, 22142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 21931 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-03-20 13:31:18,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-03-20 13:31:18,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-03-20 13:31:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0185185185185186) internal successors, (220), 216 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:31:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 224 transitions. [2022-03-20 13:31:18,264 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 224 transitions. Word has length 217 [2022-03-20 13:31:18,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 13:31:18,264 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 224 transitions. [2022-03-20 13:31:18,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 108 states have (on average 1.9722222222222223) internal successors, (213), 107 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-20 13:31:18,264 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 224 transitions. [2022-03-20 13:31:18,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-20 13:31:18,265 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 13:31:18,265 INFO L499 BasicCegarLoop]: trace histogram [104, 102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 13:31:18,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-03-20 13:31:18,466 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-20 13:31:18,467 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 13:31:18,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 13:31:18,467 INFO L85 PathProgramCache]: Analyzing trace with hash 218585535, now seen corresponding path program 102 times [2022-03-20 13:31:18,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [90801496] [2022-03-20 13:31:18,488 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:31:18,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-03-20 13:31:18,520 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 13:31:18,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1447989423, now seen corresponding path program 1 times [2022-03-20 13:31:18,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 13:31:18,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391945315] [2022-03-20 13:31:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:18,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 13:31:18,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:18,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 13:31:18,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:18,577 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:31:18,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 13:31:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391945315] [2022-03-20 13:31:18,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391945315] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 13:31:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911809381] [2022-03-20 13:31:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 13:31:18,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 13:31:18,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 13:31:18,578 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 13:31:18,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-20 13:31:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 13:31:18,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 13:31:18,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 13:31:18,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:31:18,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 13:31:18,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 13:31:18,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911809381] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 13:31:18,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-20 13:31:18,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2022-03-20 13:31:23,867 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 13:31:23,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [90801496] [2022-03-20 13:31:23,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [90801496] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 13:31:23,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 13:31:23,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-03-20 13:31:23,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212213625] [2022-03-20 13:31:23,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 13:31:23,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-03-20 13:31:23,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 13:31:23,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-03-20 13:31:23,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=914, Invalid=13848, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 13:31:23,868 INFO L87 Difference]: Start difference. First operand 221 states and 224 transitions. Second operand has 110 states, 109 states have (on average 1.9724770642201834) internal successors, (215), 108 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)