/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:49:51,956 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:49:51,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:49:52,009 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:49:52,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:49:52,049 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:49:52,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:49:52,054 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:49:52,066 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:49:52,067 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:49:52,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:49:52,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:49:52,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:49:52,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:49:52,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:49:52,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:49:52,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:49:52,069 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:49:52,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:49:52,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:49:52,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:49:52,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:49:52,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:49:52,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:49:52,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:49:52,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:49:52,070 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:49:52,071 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:49:52,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:49:52,071 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:49:52,071 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:49:52,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:49:52,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:49:52,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:49:52,349 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:49:52,349 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:49:52,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-04-06 20:49:52,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814a97a54/f79c502df2c34b50bb35aebd2bf11aa7/FLAGebe51a240 [2022-04-06 20:49:52,783 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:49:52,783 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/nested3-1.c [2022-04-06 20:49:52,787 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814a97a54/f79c502df2c34b50bb35aebd2bf11aa7/FLAGebe51a240 [2022-04-06 20:49:53,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/814a97a54/f79c502df2c34b50bb35aebd2bf11aa7 [2022-04-06 20:49:53,205 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:49:53,206 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:49:53,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:49:53,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:49:53,215 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:49:53,216 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,217 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64fe2b5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53, skipping insertion in model container [2022-04-06 20:49:53,217 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,223 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:49:53,233 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:49:53,362 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/nested3-1.c[321,334] [2022-04-06 20:49:53,374 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:49:53,379 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:49:53,389 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/nested3-1.c[321,334] [2022-04-06 20:49:53,394 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:49:53,403 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:49:53,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53 WrapperNode [2022-04-06 20:49:53,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:49:53,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:49:53,404 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:49:53,404 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:49:53,419 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,424 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,424 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,438 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,444 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,445 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:49:53,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:49:53,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:49:53,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:49:53,452 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (1/1) ... [2022-04-06 20:49:53,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:49:53,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:53,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:49:53,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:49:53,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:49:53,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:49:53,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:49:53,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:49:53,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:49:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:49:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:49:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:49:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:49:53,507 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:49:53,508 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:49:53,559 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:49:53,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:49:53,715 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:49:53,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:49:53,724 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 20:49:53,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:49:53 BoogieIcfgContainer [2022-04-06 20:49:53,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:49:53,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:49:53,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:49:53,731 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:49:53,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:49:53" (1/3) ... [2022-04-06 20:49:53,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b11d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:49:53, skipping insertion in model container [2022-04-06 20:49:53,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:49:53" (2/3) ... [2022-04-06 20:49:53,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b11d82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:49:53, skipping insertion in model container [2022-04-06 20:49:53,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:49:53" (3/3) ... [2022-04-06 20:49:53,733 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2022-04-06 20:49:53,738 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:49:53,738 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:49:53,785 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:49:53,796 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:49:53,796 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:49:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-04-06 20:49:53,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:49:53,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:53,829 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:53,829 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:53,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 1 times [2022-04-06 20:49:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1082548132] [2022-04-06 20:49:53,851 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:49:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1794590667, now seen corresponding path program 2 times [2022-04-06 20:49:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:53,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565867391] [2022-04-06 20:49:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:54,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:54,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:54,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565867391] [2022-04-06 20:49:54,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565867391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:49:54,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:54,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1082548132] [2022-04-06 20:49:54,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1082548132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:49:54,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983424168] [2022-04-06 20:49:54,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:54,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:49:54,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:49:54,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:49:54,050 INFO L87 Difference]: Start difference. First operand has 25 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) 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) [2022-04-06 20:49:54,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:54,091 INFO L93 Difference]: Finished difference Result 44 states and 63 transitions. [2022-04-06 20:49:54,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:49:54,094 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 [2022-04-06 20:49:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:54,099 INFO L225 Difference]: With dead ends: 44 [2022-04-06 20:49:54,100 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:49:54,102 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 [2022-04-06 20:49:54,105 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 16 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:54,106 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:49:54,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:49:54,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-04-06 20:49:54,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-04-06 20:49:54,142 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 11 [2022-04-06 20:49:54,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:54,142 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-04-06 20:49:54,142 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) [2022-04-06 20:49:54,143 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-04-06 20:49:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:49:54,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:54,143 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:54,144 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:49:54,144 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:54,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 1 times [2022-04-06 20:49:54,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [931854108] [2022-04-06 20:49:54,145 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:49:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1824143339, now seen corresponding path program 2 times [2022-04-06 20:49:54,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:54,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143000939] [2022-04-06 20:49:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:54,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:54,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:54,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:54,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143000939] [2022-04-06 20:49:54,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143000939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,246 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:49:54,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:54,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [931854108] [2022-04-06 20:49:54,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [931854108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,247 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:49:54,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912707803] [2022-04-06 20:49:54,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:54,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:49:54,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:49:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:49:54,249 INFO L87 Difference]: Start difference. First operand 20 states and 24 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) [2022-04-06 20:49:54,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:54,335 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-04-06 20:49:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:49:54,335 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 [2022-04-06 20:49:54,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:54,338 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:49:54,338 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:49:54,338 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 [2022-04-06 20:49:54,341 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:54,342 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 27 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:54,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:49:54,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2022-04-06 20:49:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-04-06 20:49:54,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 11 [2022-04-06 20:49:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:54,368 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-04-06 20:49:54,368 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) [2022-04-06 20:49:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-04-06 20:49:54,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 20:49:54,369 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:54,369 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:54,369 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:49:54,369 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:54,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 1 times [2022-04-06 20:49:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [181504403] [2022-04-06 20:49:54,371 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:49:54,371 INFO L85 PathProgramCache]: Analyzing trace with hash -699512288, now seen corresponding path program 2 times [2022-04-06 20:49:54,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:54,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73565679] [2022-04-06 20:49:54,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:54,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:54,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:54,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73565679] [2022-04-06 20:49:54,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73565679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:49:54,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:54,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [181504403] [2022-04-06 20:49:54,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [181504403] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:49:54,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476703151] [2022-04-06 20:49:54,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:54,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:49:54,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:49:54,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:49:54,484 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:54,545 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-04-06 20:49:54,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:49:54,545 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 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 12 [2022-04-06 20:49:54,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:54,548 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:49:54,548 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:49:54,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:49:54,552 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:54,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 27 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:49:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:49:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-04-06 20:49:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-04-06 20:49:54,588 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 12 [2022-04-06 20:49:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:54,588 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-04-06 20:49:54,588 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-04-06 20:49:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:49:54,589 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:54,589 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:54,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:49:54,589 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:54,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 1 times [2022-04-06 20:49:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912758557] [2022-04-06 20:49:54,590 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:49:54,590 INFO L85 PathProgramCache]: Analyzing trace with hash -185588926, now seen corresponding path program 2 times [2022-04-06 20:49:54,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:54,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656784385] [2022-04-06 20:49:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:54,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:54,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656784385] [2022-04-06 20:49:54,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656784385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:49:54,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:54,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912758557] [2022-04-06 20:49:54,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912758557] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:54,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:54,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:49:54,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715251154] [2022-04-06 20:49:54,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:54,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:49:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:49:54,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:49:54,682 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-04-06 20:49:54,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:54,737 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-04-06 20:49:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:49:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-04-06 20:49:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:54,739 INFO L225 Difference]: With dead ends: 39 [2022-04-06 20:49:54,740 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 20:49:54,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:49:54,745 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:54,747 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:49:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 20:49:54,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-04-06 20:49:54,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:54,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-04-06 20:49:54,759 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2022-04-06 20:49:54,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:54,759 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-04-06 20:49:54,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-04-06 20:49:54,760 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-04-06 20:49:54,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:49:54,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:54,760 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:54,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-04-06 20:49:54,760 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:54,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:54,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 1 times [2022-04-06 20:49:54,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:54,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [261036431] [2022-04-06 20:49:54,778 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:54,781 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:54,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1431986846, now seen corresponding path program 2 times [2022-04-06 20:49:54,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:54,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311631588] [2022-04-06 20:49:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:54,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:54,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:54,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:54,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:54,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:54,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311631588] [2022-04-06 20:49:54,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311631588] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:54,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80609799] [2022-04-06 20:49:54,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:54,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:54,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:54,863 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:54,898 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:49:54,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:54,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:54,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:49:54,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:54,981 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:55,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:55,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80609799] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:55,054 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:55,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 12 [2022-04-06 20:49:55,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [261036431] [2022-04-06 20:49:55,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [261036431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:55,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:55,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:49:55,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966706317] [2022-04-06 20:49:55,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:55,055 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:49:55,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:55,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:49:55,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:49:55,056 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:55,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:55,128 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2022-04-06 20:49:55,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:49:55,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 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 14 [2022-04-06 20:49:55,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:55,130 INFO L225 Difference]: With dead ends: 41 [2022-04-06 20:49:55,130 INFO L226 Difference]: Without dead ends: 25 [2022-04-06 20:49:55,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:49:55,132 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:55,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:49:55,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-04-06 20:49:55,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-04-06 20:49:55,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-04-06 20:49:55,138 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2022-04-06 20:49:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:55,138 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-04-06 20:49:55,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-04-06 20:49:55,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 20:49:55,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:55,139 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:55,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:55,358 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:55,359 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:55,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:55,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1415616702, now seen corresponding path program 3 times [2022-04-06 20:49:55,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:55,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [84894695] [2022-04-06 20:49:55,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:55,362 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:55,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1415616702, now seen corresponding path program 4 times [2022-04-06 20:49:55,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:55,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70446289] [2022-04-06 20:49:55,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:55,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:55,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:55,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:55,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70446289] [2022-04-06 20:49:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70446289] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:55,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117404559] [2022-04-06 20:49:55,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:55,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:55,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:55,439 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:55,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:49:55,471 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:55,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:55,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:49:55,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:55,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:55,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:55,609 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:55,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117404559] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:55,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:55,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:49:55,610 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:55,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [84894695] [2022-04-06 20:49:55,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [84894695] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:55,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:55,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:49:55,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150379550] [2022-04-06 20:49:55,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:55,611 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:49:55,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:55,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:49:55,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:49:55,612 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2022-04-06 20:49:55,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:55,699 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2022-04-06 20:49:55,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:49:55,700 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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 [2022-04-06 20:49:55,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:55,701 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:49:55,701 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:49:55,701 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:49:55,703 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:55,703 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:49:55,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 20:49:55,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:55,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-04-06 20:49:55,710 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 15 [2022-04-06 20:49:55,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:55,710 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-04-06 20:49:55,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 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) [2022-04-06 20:49:55,710 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-04-06 20:49:55,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:49:55,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:55,711 INFO L499 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:55,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:55,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-04-06 20:49:55,929 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:55,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:55,930 INFO L85 PathProgramCache]: Analyzing trace with hash -908142238, now seen corresponding path program 5 times [2022-04-06 20:49:55,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:55,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250521936] [2022-04-06 20:49:55,932 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:55,932 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:55,932 INFO L85 PathProgramCache]: Analyzing trace with hash -908142238, now seen corresponding path program 6 times [2022-04-06 20:49:55,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:55,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909466482] [2022-04-06 20:49:55,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:55,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:56,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:56,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:56,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909466482] [2022-04-06 20:49:56,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909466482] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:56,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836395820] [2022-04-06 20:49:56,045 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:56,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:56,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:56,046 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:56,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:49:56,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:56,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:56,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 20:49:56,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:56,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:56,236 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:56,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836395820] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:56,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:56,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 16 [2022-04-06 20:49:56,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:56,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250521936] [2022-04-06 20:49:56,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250521936] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:56,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:56,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:49:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495794009] [2022-04-06 20:49:56,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:56,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:49:56,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:49:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:49:56,357 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:56,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:56,503 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2022-04-06 20:49:56,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:49:56,504 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 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 16 [2022-04-06 20:49:56,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:56,504 INFO L225 Difference]: With dead ends: 45 [2022-04-06 20:49:56,504 INFO L226 Difference]: Without dead ends: 27 [2022-04-06 20:49:56,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:49:56,505 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:56,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-04-06 20:49:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2022-04-06 20:49:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-04-06 20:49:56,510 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 16 [2022-04-06 20:49:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:56,511 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-04-06 20:49:56,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:56,511 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-04-06 20:49:56,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:49:56,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:56,512 INFO L499 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:56,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:56,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:56,735 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:56,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1938664258, now seen corresponding path program 7 times [2022-04-06 20:49:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:56,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495684014] [2022-04-06 20:49:56,737 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:56,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:56,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1938664258, now seen corresponding path program 8 times [2022-04-06 20:49:56,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:56,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755296815] [2022-04-06 20:49:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:56,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:56,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:56,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:56,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755296815] [2022-04-06 20:49:56,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755296815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:56,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78633341] [2022-04-06 20:49:56,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:56,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:56,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:56,834 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:56,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:49:56,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:56,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:49:56,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:56,937 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:56,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:57,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78633341] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:57,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:57,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:49:57,041 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:57,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495684014] [2022-04-06 20:49:57,041 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495684014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:57,041 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:57,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:49:57,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27020332] [2022-04-06 20:49:57,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:57,042 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:49:57,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:57,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:49:57,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:49:57,043 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:57,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:57,189 INFO L93 Difference]: Finished difference Result 47 states and 56 transitions. [2022-04-06 20:49:57,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:49:57,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 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 17 [2022-04-06 20:49:57,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:57,190 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:49:57,190 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 20:49:57,192 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:49:57,192 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:57,192 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 20:49:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-04-06 20:49:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:57,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-04-06 20:49:57,200 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 17 [2022-04-06 20:49:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:57,200 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-04-06 20:49:57,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.625) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-04-06 20:49:57,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-04-06 20:49:57,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:57,201 INFO L499 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:57,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:57,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:57,424 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:57,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash -4647582, now seen corresponding path program 9 times [2022-04-06 20:49:57,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:57,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335409594] [2022-04-06 20:49:57,425 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:57,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:57,426 INFO L85 PathProgramCache]: Analyzing trace with hash -4647582, now seen corresponding path program 10 times [2022-04-06 20:49:57,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:57,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867107391] [2022-04-06 20:49:57,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:57,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:57,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:57,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:57,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:57,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867107391] [2022-04-06 20:49:57,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867107391] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:57,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208254870] [2022-04-06 20:49:57,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:57,551 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:57,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:57,552 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:57,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:49:57,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:57,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:57,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:49:57,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:57,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:57,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:57,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208254870] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:57,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:57,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:49:57,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:57,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335409594] [2022-04-06 20:49:57,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335409594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:57,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:57,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:49:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813758848] [2022-04-06 20:49:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:57,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:49:57,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:57,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:49:57,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:49:57,783 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:57,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:57,943 INFO L93 Difference]: Finished difference Result 49 states and 58 transitions. [2022-04-06 20:49:57,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:49:57,943 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 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 18 [2022-04-06 20:49:57,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:57,944 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:49:57,944 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:49:57,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:49:57,945 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:57,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 53 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:57,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:49:57,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 20:49:57,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:57,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-04-06 20:49:57,950 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 18 [2022-04-06 20:49:57,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:57,950 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-04-06 20:49:57,950 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 8 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:57,950 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-04-06 20:49:57,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:49:57,951 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:57,951 INFO L499 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:57,974 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:58,151 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:58,152 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:58,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:58,152 INFO L85 PathProgramCache]: Analyzing trace with hash -117772478, now seen corresponding path program 11 times [2022-04-06 20:49:58,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:58,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [541243230] [2022-04-06 20:49:58,153 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:58,154 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:58,154 INFO L85 PathProgramCache]: Analyzing trace with hash -117772478, now seen corresponding path program 12 times [2022-04-06 20:49:58,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:58,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200174142] [2022-04-06 20:49:58,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:58,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:58,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:58,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:58,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:58,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:58,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200174142] [2022-04-06 20:49:58,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200174142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:58,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397630641] [2022-04-06 20:49:58,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:58,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:58,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:58,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:58,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:49:58,329 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:49:58,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:58,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:49:58,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:58,527 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:49:58,527 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:49:58,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397630641] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:58,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:49:58,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [10] total 14 [2022-04-06 20:49:58,528 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:58,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [541243230] [2022-04-06 20:49:58,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [541243230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:58,528 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:58,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:49:58,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669092226] [2022-04-06 20:49:58,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:58,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:49:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:58,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:49:58,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:49:58,529 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:58,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:58,652 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2022-04-06 20:49:58,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:49:58,653 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 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 [2022-04-06 20:49:58,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:58,653 INFO L225 Difference]: With dead ends: 35 [2022-04-06 20:49:58,653 INFO L226 Difference]: Without dead ends: 33 [2022-04-06 20:49:58,654 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:49:58,654 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:58,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 84 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:49:58,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-04-06 20:49:58,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2022-04-06 20:49:58,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:58,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-04-06 20:49:58,662 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 19 [2022-04-06 20:49:58,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:58,663 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-04-06 20:49:58,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:58,663 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-04-06 20:49:58,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:49:58,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:58,663 INFO L499 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:58,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:58,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:58,864 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:58,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:58,865 INFO L85 PathProgramCache]: Analyzing trace with hash -475653086, now seen corresponding path program 1 times [2022-04-06 20:49:58,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:58,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [487551609] [2022-04-06 20:49:58,877 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:58,880 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:58,880 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:58,881 INFO L85 PathProgramCache]: Analyzing trace with hash -475653086, now seen corresponding path program 2 times [2022-04-06 20:49:58,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:58,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407870178] [2022-04-06 20:49:58,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:58,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:58,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:58,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-04-06 20:49:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:58,974 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:58,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:58,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407870178] [2022-04-06 20:49:58,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407870178] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:58,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784951821] [2022-04-06 20:49:58,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:58,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:58,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:58,976 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:58,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:49:59,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:59,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:59,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:49:59,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:59,133 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:49:59,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:59,253 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 20:49:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784951821] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:59,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:59,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 6] total 18 [2022-04-06 20:49:59,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:59,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [487551609] [2022-04-06 20:49:59,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [487551609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:59,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:59,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:49:59,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443819513] [2022-04-06 20:49:59,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:59,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:49:59,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:59,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:49:59,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:49:59,256 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:59,404 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-04-06 20:49:59,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:49:59,405 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2022-04-06 20:49:59,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:59,406 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:49:59,406 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 20:49:59,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:49:59,407 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:59,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:49:59,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 20:49:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-04-06 20:49:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:49:59,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2022-04-06 20:49:59,414 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2022-04-06 20:49:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:59,415 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2022-04-06 20:49:59,415 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:49:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2022-04-06 20:49:59,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 20:49:59,415 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:59,416 INFO L499 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:59,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:59,619 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:59,619 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:59,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:59,620 INFO L85 PathProgramCache]: Analyzing trace with hash -908061182, now seen corresponding path program 3 times [2022-04-06 20:49:59,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:59,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [550186764] [2022-04-06 20:49:59,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:59,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:59,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:59,637 INFO L85 PathProgramCache]: Analyzing trace with hash -908061182, now seen corresponding path program 4 times [2022-04-06 20:49:59,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:59,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708229274] [2022-04-06 20:49:59,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:59,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:59,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:59,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:59,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:59,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-04-06 20:49:59,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:59,776 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:59,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:59,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708229274] [2022-04-06 20:49:59,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708229274] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:59,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973914861] [2022-04-06 20:49:59,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:59,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:59,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:59,777 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:59,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:49:59,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:59,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:59,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:49:59,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:59,908 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:49:59,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:00,026 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 20:50:00,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973914861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:00,026 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:00,026 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 19 [2022-04-06 20:50:00,026 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:00,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [550186764] [2022-04-06 20:50:00,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [550186764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:00,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:00,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:50:00,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401149685] [2022-04-06 20:50:00,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:00,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:50:00,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:00,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:50:00,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:50:00,028 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:00,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:00,205 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-04-06 20:50:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:50:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2022-04-06 20:50:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:00,206 INFO L225 Difference]: With dead ends: 61 [2022-04-06 20:50:00,206 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:50:00,206 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:50:00,207 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:00,207 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:00,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:50:00,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 20:50:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.16) internal successors, (29), 26 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2022-04-06 20:50:00,218 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 27 [2022-04-06 20:50:00,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:00,218 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2022-04-06 20:50:00,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:00,218 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2022-04-06 20:50:00,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:50:00,223 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:00,223 INFO L499 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:00,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:00,444 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,SelfDestructingSolverStorable11 [2022-04-06 20:50:00,444 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:00,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1427810270, now seen corresponding path program 5 times [2022-04-06 20:50:00,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:00,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1008322776] [2022-04-06 20:50:00,455 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:00,458 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:00,458 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1427810270, now seen corresponding path program 6 times [2022-04-06 20:50:00,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:00,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564425140] [2022-04-06 20:50:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:00,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:00,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:00,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:00,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 20:50:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:00,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:00,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564425140] [2022-04-06 20:50:00,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564425140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:00,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37708072] [2022-04-06 20:50:00,588 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:00,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:00,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:00,589 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:00,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:50:00,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:00,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:00,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:00,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:00,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:50:00,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:50:00,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37708072] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:00,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:00,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 6, 6] total 20 [2022-04-06 20:50:00,814 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:00,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1008322776] [2022-04-06 20:50:00,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1008322776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:00,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:00,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:50:00,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629860376] [2022-04-06 20:50:00,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:00,815 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:50:00,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:00,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:50:00,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:50:00,816 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:01,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:01,051 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2022-04-06 20:50:01,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:50:01,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2022-04-06 20:50:01,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:01,052 INFO L225 Difference]: With dead ends: 63 [2022-04-06 20:50:01,052 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:50:01,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:50:01,053 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:01,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:50:01,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2022-04-06 20:50:01,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-04-06 20:50:01,066 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 28 [2022-04-06 20:50:01,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:01,067 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-04-06 20:50:01,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-04-06 20:50:01,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:50:01,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:01,069 INFO L499 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:01,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:01,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:50:01,270 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:01,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:01,270 INFO L85 PathProgramCache]: Analyzing trace with hash -360162814, now seen corresponding path program 7 times [2022-04-06 20:50:01,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:01,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1609099670] [2022-04-06 20:50:01,284 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:01,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:01,288 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash -360162814, now seen corresponding path program 8 times [2022-04-06 20:50:01,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:01,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806829315] [2022-04-06 20:50:01,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:01,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:01,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:01,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:01,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:01,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-04-06 20:50:01,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 3 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:01,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:01,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806829315] [2022-04-06 20:50:01,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806829315] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:01,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534265889] [2022-04-06 20:50:01,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:01,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:01,443 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:01,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:50:01,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:01,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:01,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:01,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:01,597 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 18 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:50:01,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:50:01,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534265889] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:01,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:01,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 6] total 21 [2022-04-06 20:50:01,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:01,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1609099670] [2022-04-06 20:50:01,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1609099670] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:01,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:01,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:50:01,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345725245] [2022-04-06 20:50:01,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:01,737 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:50:01,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:01,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:50:01,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:50:01,738 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:01,998 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2022-04-06 20:50:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:50:01,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2022-04-06 20:50:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:01,999 INFO L225 Difference]: With dead ends: 65 [2022-04-06 20:50:01,999 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:50:02,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=130, Invalid=800, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:50:02,005 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:02,005 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:02,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:50:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-06 20:50:02,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:02,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2022-04-06 20:50:02,023 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 29 [2022-04-06 20:50:02,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:02,023 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2022-04-06 20:50:02,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:02,023 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2022-04-06 20:50:02,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 20:50:02,024 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:02,024 INFO L499 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:02,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:02,247 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,SelfDestructingSolverStorable13 [2022-04-06 20:50:02,248 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:02,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830046, now seen corresponding path program 9 times [2022-04-06 20:50:02,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:02,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [96415569] [2022-04-06 20:50:02,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:02,264 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:02,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:02,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1622830046, now seen corresponding path program 10 times [2022-04-06 20:50:02,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:02,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300639819] [2022-04-06 20:50:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:02,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:02,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:02,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-04-06 20:50:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:02,428 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:02,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300639819] [2022-04-06 20:50:02,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300639819] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:02,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565427354] [2022-04-06 20:50:02,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:02,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:02,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:02,431 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:02,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:50:02,476 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:02,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:02,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:02,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:50:02,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 20:50:02,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565427354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:02,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:02,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6, 6] total 22 [2022-04-06 20:50:02,699 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [96415569] [2022-04-06 20:50:02,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [96415569] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:02,699 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:02,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:50:02,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840440536] [2022-04-06 20:50:02,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:02,700 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:50:02,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:50:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:50:02,702 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:03,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:03,001 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2022-04-06 20:50:03,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:50:03,002 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 30 [2022-04-06 20:50:03,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:03,002 INFO L225 Difference]: With dead ends: 67 [2022-04-06 20:50:03,003 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:50:03,003 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:50:03,004 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:03,004 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 73 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:03,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:50:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-04-06 20:50:03,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 29 states have internal predecessors, (32), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2022-04-06 20:50:03,011 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 30 [2022-04-06 20:50:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:03,011 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2022-04-06 20:50:03,011 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:03,012 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2022-04-06 20:50:03,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:50:03,012 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:03,012 INFO L499 BasicCegarLoop]: trace histogram [11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:03,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:03,232 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,SelfDestructingSolverStorable14 [2022-04-06 20:50:03,232 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:03,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:03,233 INFO L85 PathProgramCache]: Analyzing trace with hash -2110808574, now seen corresponding path program 11 times [2022-04-06 20:50:03,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:03,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1710729853] [2022-04-06 20:50:03,245 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:03,262 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:03,262 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:03,262 INFO L85 PathProgramCache]: Analyzing trace with hash -2110808574, now seen corresponding path program 12 times [2022-04-06 20:50:03,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:03,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30076282] [2022-04-06 20:50:03,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:03,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:03,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:03,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:03,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2022-04-06 20:50:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:03,433 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:03,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30076282] [2022-04-06 20:50:03,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30076282] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:03,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658225797] [2022-04-06 20:50:03,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:03,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:03,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:03,435 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:03,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:50:03,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:03,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:03,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:03,546 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:50:03,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:03,648 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:50:03,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658225797] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:03,648 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:03,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 4] total 19 [2022-04-06 20:50:03,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:03,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1710729853] [2022-04-06 20:50:03,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1710729853] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:03,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:03,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:50:03,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232914867] [2022-04-06 20:50:03,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:03,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:50:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:03,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:50:03,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:50:03,650 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:03,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:03,943 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2022-04-06 20:50:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:50:03,944 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2022-04-06 20:50:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:03,944 INFO L225 Difference]: With dead ends: 69 [2022-04-06 20:50:03,944 INFO L226 Difference]: Without dead ends: 39 [2022-04-06 20:50:03,945 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:50:03,945 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:03,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:03,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-04-06 20:50:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2022-04-06 20:50:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:03,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2022-04-06 20:50:03,952 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 31 [2022-04-06 20:50:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:03,952 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2022-04-06 20:50:03,952 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:03,952 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2022-04-06 20:50:03,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:50:03,952 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:03,952 INFO L499 BasicCegarLoop]: trace histogram [12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:03,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:04,153 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,SelfDestructingSolverStorable15 [2022-04-06 20:50:04,153 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -58273758, now seen corresponding path program 13 times [2022-04-06 20:50:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:04,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [270620389] [2022-04-06 20:50:04,162 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:04,167 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:04,167 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:04,167 INFO L85 PathProgramCache]: Analyzing trace with hash -58273758, now seen corresponding path program 14 times [2022-04-06 20:50:04,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:04,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653173249] [2022-04-06 20:50:04,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:04,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:04,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-04-06 20:50:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,344 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 3 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:04,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653173249] [2022-04-06 20:50:04,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653173249] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:04,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768212360] [2022-04-06 20:50:04,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:04,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:04,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:04,347 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:04,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:50:04,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:04,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:04,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:04,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:04,487 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:50:04,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:04,637 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:50:04,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768212360] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:04,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:04,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6, 6] total 24 [2022-04-06 20:50:04,638 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:04,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [270620389] [2022-04-06 20:50:04,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [270620389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:04,638 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:04,638 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:50:04,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890606441] [2022-04-06 20:50:04,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:04,638 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:50:04,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:04,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:50:04,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=471, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:50:04,639 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:04,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:04,911 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2022-04-06 20:50:04,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:50:04,912 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-04-06 20:50:04,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:04,912 INFO L225 Difference]: With dead ends: 71 [2022-04-06 20:50:04,913 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:50:04,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:50:04,914 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:04,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:50:04,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 20:50:04,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:04,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2022-04-06 20:50:04,921 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 32 [2022-04-06 20:50:04,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:04,921 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2022-04-06 20:50:04,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:04,921 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2022-04-06 20:50:04,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 20:50:04,922 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:04,922 INFO L499 BasicCegarLoop]: trace histogram [13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:04,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:05,136 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,SelfDestructingSolverStorable16 [2022-04-06 20:50:05,136 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:05,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash -854203902, now seen corresponding path program 15 times [2022-04-06 20:50:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:05,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112805950] [2022-04-06 20:50:05,147 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:05,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:05,163 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:05,163 INFO L85 PathProgramCache]: Analyzing trace with hash -854203902, now seen corresponding path program 16 times [2022-04-06 20:50:05,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:05,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665139330] [2022-04-06 20:50:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:05,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:05,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 20:50:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:05,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:05,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665139330] [2022-04-06 20:50:05,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665139330] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:05,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292770171] [2022-04-06 20:50:05,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:05,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:05,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:05,394 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:05,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:50:05,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:05,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:05,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:05,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:50:05,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:05,685 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-04-06 20:50:05,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292770171] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:05,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:05,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 6, 6] total 25 [2022-04-06 20:50:05,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:05,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112805950] [2022-04-06 20:50:05,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112805950] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:05,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:05,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:50:05,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111763630] [2022-04-06 20:50:05,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:05,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:50:05,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:05,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:50:05,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:50:05,688 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:06,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:06,023 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2022-04-06 20:50:06,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:50:06,024 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-04-06 20:50:06,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:06,024 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:50:06,024 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:50:06,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=166, Invalid=1316, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:50:06,025 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:06,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:06,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:50:06,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-04-06 20:50:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 32 states have internal predecessors, (35), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:06,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-04-06 20:50:06,033 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 33 [2022-04-06 20:50:06,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:06,033 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-04-06 20:50:06,033 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-04-06 20:50:06,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:50:06,034 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:06,034 INFO L499 BasicCegarLoop]: trace histogram [14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:06,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:06,251 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:06,251 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:06,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:06,252 INFO L85 PathProgramCache]: Analyzing trace with hash 241765410, now seen corresponding path program 17 times [2022-04-06 20:50:06,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:06,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834221239] [2022-04-06 20:50:06,261 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:06,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:06,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:06,265 INFO L85 PathProgramCache]: Analyzing trace with hash 241765410, now seen corresponding path program 18 times [2022-04-06 20:50:06,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:06,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095028240] [2022-04-06 20:50:06,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:06,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:06,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:06,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:06,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-04-06 20:50:06,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:06,458 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 3 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:06,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:06,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095028240] [2022-04-06 20:50:06,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095028240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:06,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678673768] [2022-04-06 20:50:06,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:06,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:06,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:06,459 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:06,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:50:06,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:06,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:06,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:06,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:50:06,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:50:06,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678673768] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:06,660 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:06,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 4] total 22 [2022-04-06 20:50:06,660 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834221239] [2022-04-06 20:50:06,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834221239] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:06,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:06,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:50:06,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087025110] [2022-04-06 20:50:06,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:06,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:50:06,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:06,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:50:06,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:50:06,661 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:07,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:07,036 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2022-04-06 20:50:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:50:07,036 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 34 [2022-04-06 20:50:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:07,036 INFO L225 Difference]: With dead ends: 75 [2022-04-06 20:50:07,037 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 20:50:07,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:50:07,037 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:07,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 93 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:07,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 20:50:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-04-06 20:50:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2022-04-06 20:50:07,045 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 34 [2022-04-06 20:50:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:07,045 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2022-04-06 20:50:07,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2022-04-06 20:50:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:50:07,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:07,046 INFO L499 BasicCegarLoop]: trace histogram [15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:07,068 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:07,262 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:07,262 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:07,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:07,263 INFO L85 PathProgramCache]: Analyzing trace with hash -142924286, now seen corresponding path program 19 times [2022-04-06 20:50:07,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [238608379] [2022-04-06 20:50:07,273 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:07,278 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:07,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:07,278 INFO L85 PathProgramCache]: Analyzing trace with hash -142924286, now seen corresponding path program 20 times [2022-04-06 20:50:07,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:07,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981098127] [2022-04-06 20:50:07,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:07,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:07,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:07,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-04-06 20:50:07,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:07,492 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:07,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:07,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981098127] [2022-04-06 20:50:07,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981098127] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:07,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806659455] [2022-04-06 20:50:07,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:07,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:07,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:07,499 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:07,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:50:07,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:07,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:07,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:50:07,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:07,643 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:50:07,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:07,848 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-04-06 20:50:07,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806659455] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:07,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:07,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 7] total 26 [2022-04-06 20:50:07,849 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:07,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [238608379] [2022-04-06 20:50:07,849 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [238608379] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:07,849 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:07,849 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:50:07,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048033587] [2022-04-06 20:50:07,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:07,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:50:07,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:07,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:50:07,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:50:07,850 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:08,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:08,189 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-04-06 20:50:08,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:50:08,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2022-04-06 20:50:08,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:08,190 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:50:08,190 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 20:50:08,191 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1558, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:50:08,191 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:08,191 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 38 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 319 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:50:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 20:50:08,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 20:50:08,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:08,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2022-04-06 20:50:08,198 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 35 [2022-04-06 20:50:08,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:08,198 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2022-04-06 20:50:08,198 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:08,198 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2022-04-06 20:50:08,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 20:50:08,199 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:08,199 INFO L499 BasicCegarLoop]: trace histogram [16, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:08,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:08,402 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:08,403 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:08,403 INFO L85 PathProgramCache]: Analyzing trace with hash 816597026, now seen corresponding path program 21 times [2022-04-06 20:50:08,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:08,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [202715689] [2022-04-06 20:50:08,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:08,417 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:08,417 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:08,417 INFO L85 PathProgramCache]: Analyzing trace with hash 816597026, now seen corresponding path program 22 times [2022-04-06 20:50:08,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:08,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345324434] [2022-04-06 20:50:08,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:08,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:08,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:08,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:08,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:08,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-04-06 20:50:08,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 3 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345324434] [2022-04-06 20:50:08,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345324434] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:08,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138168579] [2022-04-06 20:50:08,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:08,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:08,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:08,716 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:08,717 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:50:08,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:08,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:08,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:08,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:50:08,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:09,030 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 32 proven. 2 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-04-06 20:50:09,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138168579] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:09,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:09,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6, 6] total 28 [2022-04-06 20:50:09,031 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:09,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [202715689] [2022-04-06 20:50:09,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [202715689] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:09,031 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:09,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:50:09,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272689469] [2022-04-06 20:50:09,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:09,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:50:09,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:09,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:50:09,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:50:09,032 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:09,479 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2022-04-06 20:50:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:50:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2022-04-06 20:50:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:09,480 INFO L225 Difference]: With dead ends: 79 [2022-04-06 20:50:09,480 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:50:09,481 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:50:09,481 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:09,481 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 93 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:50:09,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 20:50:09,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 35 states have internal predecessors, (38), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2022-04-06 20:50:09,487 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 36 [2022-04-06 20:50:09,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:09,487 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2022-04-06 20:50:09,487 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:09,487 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2022-04-06 20:50:09,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:50:09,488 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:09,488 INFO L499 BasicCegarLoop]: trace histogram [17, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:09,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:09,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:09,695 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:09,696 INFO L85 PathProgramCache]: Analyzing trace with hash 496986626, now seen corresponding path program 23 times [2022-04-06 20:50:09,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:09,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1739560580] [2022-04-06 20:50:09,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:09,708 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:09,708 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:09,708 INFO L85 PathProgramCache]: Analyzing trace with hash 496986626, now seen corresponding path program 24 times [2022-04-06 20:50:09,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:09,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806784227] [2022-04-06 20:50:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:09,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:09,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:09,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:09,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:09,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-04-06 20:50:09,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 3 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806784227] [2022-04-06 20:50:09,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806784227] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:09,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132320231] [2022-04-06 20:50:09,965 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:09,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:09,967 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:09,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:50:10,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:10,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:10,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:10,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:50:10,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:10,249 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:50:10,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132320231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:10,251 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:10,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 6, 6] total 29 [2022-04-06 20:50:10,252 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:10,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1739560580] [2022-04-06 20:50:10,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1739560580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:10,252 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:10,252 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:50:10,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713585128] [2022-04-06 20:50:10,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:10,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:50:10,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:10,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:50:10,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=736, Unknown=0, NotChecked=0, Total=812 [2022-04-06 20:50:10,253 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:10,738 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2022-04-06 20:50:10,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:50:10,740 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2022-04-06 20:50:10,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:10,741 INFO L225 Difference]: With dead ends: 81 [2022-04-06 20:50:10,741 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 20:50:10,741 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=182, Invalid=1980, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 20:50:10,742 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:10,742 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:10,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 20:50:10,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2022-04-06 20:50:10,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:10,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2022-04-06 20:50:10,749 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2022-04-06 20:50:10,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:10,749 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2022-04-06 20:50:10,749 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 20 states have internal predecessors, (31), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:10,750 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2022-04-06 20:50:10,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:50:10,750 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:10,751 INFO L499 BasicCegarLoop]: trace histogram [18, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:10,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:10,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:10,951 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:10,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:10,952 INFO L85 PathProgramCache]: Analyzing trace with hash -821001182, now seen corresponding path program 25 times [2022-04-06 20:50:10,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:10,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637937838] [2022-04-06 20:50:10,964 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:10,970 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:10,971 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash -821001182, now seen corresponding path program 26 times [2022-04-06 20:50:10,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:10,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727338888] [2022-04-06 20:50:10,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:10,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-04-06 20:50:11,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:11,270 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 3 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:11,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727338888] [2022-04-06 20:50:11,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727338888] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:11,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062765573] [2022-04-06 20:50:11,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:11,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:11,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:11,272 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:11,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:50:11,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:11,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:11,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:11,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:50:11,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:11,642 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 36 proven. 2 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:50:11,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062765573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:11,642 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:11,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 6, 6] total 30 [2022-04-06 20:50:11,643 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:11,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637937838] [2022-04-06 20:50:11,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637937838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:11,643 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:11,643 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:50:11,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390828190] [2022-04-06 20:50:11,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:11,643 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:50:11,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:50:11,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:50:11,644 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:12,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:12,127 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-04-06 20:50:12,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:50:12,130 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2022-04-06 20:50:12,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:12,130 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:50:12,131 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:50:12,131 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=2141, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:50:12,132 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:12,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:12,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:50:12,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 20:50:12,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:12,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-04-06 20:50:12,138 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 38 [2022-04-06 20:50:12,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:12,138 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-04-06 20:50:12,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:12,138 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-04-06 20:50:12,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 20:50:12,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:12,139 INFO L499 BasicCegarLoop]: trace histogram [19, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:12,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:12,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:12,355 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:12,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:12,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1271049730, now seen corresponding path program 27 times [2022-04-06 20:50:12,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:12,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1112995802] [2022-04-06 20:50:12,367 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:12,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:12,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:12,373 INFO L85 PathProgramCache]: Analyzing trace with hash 1271049730, now seen corresponding path program 28 times [2022-04-06 20:50:12,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:12,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628608572] [2022-04-06 20:50:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:12,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:12,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:12,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:12,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:12,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-04-06 20:50:12,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:12,695 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 3 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:12,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628608572] [2022-04-06 20:50:12,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628608572] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:12,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635489139] [2022-04-06 20:50:12,695 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:12,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:12,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:12,696 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:12,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:50:12,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:12,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:12,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:12,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:12,878 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 2 proven. 38 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:50:12,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 38 proven. 2 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:50:13,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635489139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:13,045 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:13,045 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6, 6] total 31 [2022-04-06 20:50:13,045 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:13,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1112995802] [2022-04-06 20:50:13,045 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1112995802] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:13,045 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:13,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:50:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335243505] [2022-04-06 20:50:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:13,046 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:50:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:50:13,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:50:13,047 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:13,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:13,557 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2022-04-06 20:50:13,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:50:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-04-06 20:50:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:13,558 INFO L225 Difference]: With dead ends: 85 [2022-04-06 20:50:13,558 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:50:13,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:50:13,560 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:13,560 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 526 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:13,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:50:13,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 20:50:13,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 38 states have internal predecessors, (41), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:13,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2022-04-06 20:50:13,567 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 39 [2022-04-06 20:50:13,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:13,567 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2022-04-06 20:50:13,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 22 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:13,567 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2022-04-06 20:50:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:50:13,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:13,568 INFO L499 BasicCegarLoop]: trace histogram [20, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:13,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:13,775 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,SelfDestructingSolverStorable23 [2022-04-06 20:50:13,775 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:13,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:13,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1700118562, now seen corresponding path program 29 times [2022-04-06 20:50:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [684761223] [2022-04-06 20:50:13,784 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:13,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:13,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1700118562, now seen corresponding path program 30 times [2022-04-06 20:50:13,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:13,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355041044] [2022-04-06 20:50:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:13,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-04-06 20:50:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 3 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355041044] [2022-04-06 20:50:14,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355041044] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366040336] [2022-04-06 20:50:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:14,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:14,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:14,162 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:14,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:50:14,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:14,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:14,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:14,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:50:14,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:14,491 INFO L134 CoverageAnalysis]: Checked inductivity of 213 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:50:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366040336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:14,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 6, 6] total 32 [2022-04-06 20:50:14,492 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:14,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [684761223] [2022-04-06 20:50:14,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [684761223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:14,492 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:14,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:50:14,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497714363] [2022-04-06 20:50:14,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:14,492 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:50:14,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:14,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:50:14,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:50:14,493 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:15,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:15,051 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2022-04-06 20:50:15,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:50:15,052 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 40 [2022-04-06 20:50:15,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:15,052 INFO L225 Difference]: With dead ends: 87 [2022-04-06 20:50:15,052 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 20:50:15,054 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=2547, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 20:50:15,054 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:15,054 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 20:50:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-04-06 20:50:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 38 states have (on average 1.105263157894737) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:15,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2022-04-06 20:50:15,065 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 40 [2022-04-06 20:50:15,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:15,066 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2022-04-06 20:50:15,066 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 23 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:15,066 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2022-04-06 20:50:15,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:50:15,066 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:15,066 INFO L499 BasicCegarLoop]: trace histogram [21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:15,073 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:15,270 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,SelfDestructingSolverStorable24 [2022-04-06 20:50:15,271 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:15,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:15,271 INFO L85 PathProgramCache]: Analyzing trace with hash 2116350466, now seen corresponding path program 31 times [2022-04-06 20:50:15,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:15,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1847254182] [2022-04-06 20:50:15,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:15,283 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:15,283 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2116350466, now seen corresponding path program 32 times [2022-04-06 20:50:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:15,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244998245] [2022-04-06 20:50:15,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:15,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:15,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:15,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-04-06 20:50:15,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 3 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:15,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:15,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244998245] [2022-04-06 20:50:15,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244998245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:15,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912574655] [2022-04-06 20:50:15,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:15,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:15,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:15,628 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:15,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:50:15,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:15,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:15,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:15,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 2 proven. 42 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:50:15,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:15,980 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 42 proven. 2 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 20:50:15,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912574655] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:15,980 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:15,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 6] total 33 [2022-04-06 20:50:15,980 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:15,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1847254182] [2022-04-06 20:50:15,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1847254182] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:15,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:15,980 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:50:15,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328813279] [2022-04-06 20:50:15,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:15,981 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:50:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:50:15,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=948, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:50:15,982 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:16,535 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2022-04-06 20:50:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:50:16,536 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 41 [2022-04-06 20:50:16,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:16,536 INFO L225 Difference]: With dead ends: 89 [2022-04-06 20:50:16,536 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:50:16,537 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=238, Invalid=2732, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:50:16,538 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:16,538 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:50:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:50:16,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-04-06 20:50:16,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 40 states have internal predecessors, (43), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2022-04-06 20:50:16,545 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 41 [2022-04-06 20:50:16,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:16,545 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2022-04-06 20:50:16,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 24 states have internal predecessors, (35), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:16,545 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2022-04-06 20:50:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 20:50:16,545 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:16,546 INFO L499 BasicCegarLoop]: trace histogram [22, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:16,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:16,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 20:50:16,747 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:16,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:16,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637602, now seen corresponding path program 33 times [2022-04-06 20:50:16,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:16,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1705438709] [2022-04-06 20:50:16,756 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:16,763 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:16,763 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:16,763 INFO L85 PathProgramCache]: Analyzing trace with hash 2134637602, now seen corresponding path program 34 times [2022-04-06 20:50:16,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:16,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424568759] [2022-04-06 20:50:16,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:16,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:16,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:17,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:17,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:17,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-04-06 20:50:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:17,117 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 3 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:17,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424568759] [2022-04-06 20:50:17,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424568759] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:17,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606632600] [2022-04-06 20:50:17,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:17,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:17,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:17,118 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:17,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:50:17,163 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:17,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:17,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:17,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:17,294 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:50:17,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:17,463 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 44 proven. 2 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2022-04-06 20:50:17,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606632600] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:17,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:17,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 6, 6] total 34 [2022-04-06 20:50:17,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:17,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1705438709] [2022-04-06 20:50:17,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1705438709] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:17,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:17,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:50:17,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321360062] [2022-04-06 20:50:17,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:17,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:50:17,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:17,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:50:17,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1011, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:50:17,465 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:18,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:18,114 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2022-04-06 20:50:18,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:50:18,114 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 42 [2022-04-06 20:50:18,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:18,115 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:50:18,115 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:50:18,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=247, Invalid=2945, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:50:18,116 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:18,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 93 Invalid, 815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:18,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:50:18,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 20:50:18,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.1) internal successors, (44), 41 states have internal predecessors, (44), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:18,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2022-04-06 20:50:18,124 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 42 [2022-04-06 20:50:18,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:18,124 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2022-04-06 20:50:18,124 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 25 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:18,124 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2022-04-06 20:50:18,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:50:18,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:18,125 INFO L499 BasicCegarLoop]: trace histogram [23, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:18,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-04-06 20:50:18,331 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:18,331 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:18,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1593428478, now seen corresponding path program 35 times [2022-04-06 20:50:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:18,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1629102946] [2022-04-06 20:50:18,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:18,346 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:18,346 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1593428478, now seen corresponding path program 36 times [2022-04-06 20:50:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376127105] [2022-04-06 20:50:18,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:18,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:18,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-04-06 20:50:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:18,713 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 3 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:18,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:18,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376127105] [2022-04-06 20:50:18,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376127105] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:18,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284135790] [2022-04-06 20:50:18,714 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:18,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:18,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:18,715 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:18,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:50:18,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:18,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:18,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:18,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:18,850 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:50:18,851 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:50:18,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284135790] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:18,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:18,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 4, 4] total 31 [2022-04-06 20:50:18,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:18,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1629102946] [2022-04-06 20:50:18,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1629102946] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:18,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:18,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:50:18,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141365947] [2022-04-06 20:50:18,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:18,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:50:18,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:18,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:50:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:50:18,975 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:19,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:19,631 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-04-06 20:50:19,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:50:19,632 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 43 [2022-04-06 20:50:19,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:19,632 INFO L225 Difference]: With dead ends: 93 [2022-04-06 20:50:19,632 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 20:50:19,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=228, Invalid=2742, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:50:19,633 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 811 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 811 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:19,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 93 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 811 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:19,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 20:50:19,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2022-04-06 20:50:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 42 states have internal predecessors, (45), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-04-06 20:50:19,641 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2022-04-06 20:50:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:19,641 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-04-06 20:50:19,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 26 states have internal predecessors, (37), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-04-06 20:50:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:50:19,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:19,642 INFO L499 BasicCegarLoop]: trace histogram [24, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:19,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:19,847 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,SelfDestructingSolverStorable27 [2022-04-06 20:50:19,847 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:19,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1199359966, now seen corresponding path program 37 times [2022-04-06 20:50:19,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:19,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445396737] [2022-04-06 20:50:19,856 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:19,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:19,862 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1199359966, now seen corresponding path program 38 times [2022-04-06 20:50:19,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:19,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588325857] [2022-04-06 20:50:19,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:19,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:19,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-04-06 20:50:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:20,301 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 3 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:20,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588325857] [2022-04-06 20:50:20,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588325857] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:20,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841324758] [2022-04-06 20:50:20,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:20,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:20,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:20,303 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:20,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:50:20,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:20,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:20,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:20,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:20,588 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:50:20,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:20,798 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2022-04-06 20:50:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841324758] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:20,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:20,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 6, 6] total 36 [2022-04-06 20:50:20,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:20,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445396737] [2022-04-06 20:50:20,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445396737] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:20,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:20,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:50:20,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982853905] [2022-04-06 20:50:20,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:20,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:50:20,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:20,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:50:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1143, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:50:20,800 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:21,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:21,536 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2022-04-06 20:50:21,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:50:21,536 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 44 [2022-04-06 20:50:21,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:21,537 INFO L225 Difference]: With dead ends: 95 [2022-04-06 20:50:21,537 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:50:21,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:50:21,538 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:21,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 846 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:50:21,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 20:50:21,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 43 states have internal predecessors, (46), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:21,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2022-04-06 20:50:21,546 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2022-04-06 20:50:21,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:21,546 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2022-04-06 20:50:21,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:21,547 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2022-04-06 20:50:21,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 20:50:21,547 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:21,547 INFO L499 BasicCegarLoop]: trace histogram [25, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:21,566 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:50:21,759 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,SelfDestructingSolverStorable28 [2022-04-06 20:50:21,759 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:21,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:21,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1868137982, now seen corresponding path program 39 times [2022-04-06 20:50:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2119916634] [2022-04-06 20:50:21,768 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:21,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:21,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:21,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1868137982, now seen corresponding path program 40 times [2022-04-06 20:50:21,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:21,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251802376] [2022-04-06 20:50:21,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:21,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:21,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:22,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-04-06 20:50:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 3 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:22,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:22,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251802376] [2022-04-06 20:50:22,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251802376] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:22,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803388079] [2022-04-06 20:50:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:22,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:22,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:22,271 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:22,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:50:22,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:22,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:22,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:22,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:50:22,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 328 backedges. 50 proven. 2 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 20:50:22,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803388079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:22,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:22,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 6, 6] total 37 [2022-04-06 20:50:22,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:22,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2119916634] [2022-04-06 20:50:22,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2119916634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:22,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:22,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:50:22,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439427118] [2022-04-06 20:50:22,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:22,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:50:22,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:22,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:50:22,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1212, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:50:22,656 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:23,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:23,475 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2022-04-06 20:50:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:50:23,475 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-04-06 20:50:23,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:23,476 INFO L225 Difference]: With dead ends: 97 [2022-04-06 20:50:23,476 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:50:23,477 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=274, Invalid=3632, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:50:23,477 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:23,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 133 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:23,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:50:23,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 20:50:23,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 44 states have internal predecessors, (47), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:23,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-04-06 20:50:23,482 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 45 [2022-04-06 20:50:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:23,482 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-04-06 20:50:23,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:23,483 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-04-06 20:50:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:50:23,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:23,483 INFO L499 BasicCegarLoop]: trace histogram [26, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:23,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:50:23,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:23,684 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1125419998, now seen corresponding path program 41 times [2022-04-06 20:50:23,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:23,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [899702412] [2022-04-06 20:50:23,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:23,699 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:23,699 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:23,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1125419998, now seen corresponding path program 42 times [2022-04-06 20:50:23,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:23,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569704382] [2022-04-06 20:50:23,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:23,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:24,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-04-06 20:50:24,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 3 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:24,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:24,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569704382] [2022-04-06 20:50:24,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569704382] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:24,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182671861] [2022-04-06 20:50:24,136 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:24,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:24,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:24,139 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:24,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:50:24,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:24,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:24,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:24,315 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:50:24,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:50:24,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182671861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:24,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:24,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6, 6] total 38 [2022-04-06 20:50:24,484 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:24,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [899702412] [2022-04-06 20:50:24,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [899702412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:24,484 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:24,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:50:24,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828203638] [2022-04-06 20:50:24,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:24,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:50:24,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:24,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:50:24,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:50:24,485 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:25,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:25,274 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2022-04-06 20:50:25,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:50:25,274 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 46 [2022-04-06 20:50:25,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:25,275 INFO L225 Difference]: With dead ends: 99 [2022-04-06 20:50:25,275 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 20:50:25,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=263, Invalid=3897, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:50:25,276 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:25,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:25,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 20:50:25,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-04-06 20:50:25,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 45 states have internal predecessors, (48), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:25,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2022-04-06 20:50:25,282 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2022-04-06 20:50:25,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:25,282 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2022-04-06 20:50:25,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2022-04-06 20:50:25,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:50:25,282 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:25,282 INFO L499 BasicCegarLoop]: trace histogram [27, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:25,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:25,483 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:25,483 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:25,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:25,483 INFO L85 PathProgramCache]: Analyzing trace with hash 424001026, now seen corresponding path program 43 times [2022-04-06 20:50:25,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:25,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [651340603] [2022-04-06 20:50:25,492 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:25,498 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:25,498 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:25,498 INFO L85 PathProgramCache]: Analyzing trace with hash 424001026, now seen corresponding path program 44 times [2022-04-06 20:50:25,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:25,498 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694918621] [2022-04-06 20:50:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:25,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:25,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-04-06 20:50:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:25,974 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 3 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:25,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:25,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694918621] [2022-04-06 20:50:25,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694918621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:25,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6791156] [2022-04-06 20:50:25,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:25,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:25,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:25,983 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:25,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:50:26,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:26,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:26,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:26,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 2 proven. 54 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:50:26,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:26,392 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 54 proven. 2 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2022-04-06 20:50:26,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6791156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:26,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:26,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 6, 6] total 39 [2022-04-06 20:50:26,393 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:26,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [651340603] [2022-04-06 20:50:26,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [651340603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:26,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:26,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:50:26,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874079816] [2022-04-06 20:50:26,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:26,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:50:26,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:50:26,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1356, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:50:26,395 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:27,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:27,195 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2022-04-06 20:50:27,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:50:27,195 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 47 [2022-04-06 20:50:27,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:27,196 INFO L225 Difference]: With dead ends: 101 [2022-04-06 20:50:27,196 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 20:50:27,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:50:27,197 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:27,197 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 68 Invalid, 1010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:27,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 20:50:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 20:50:27,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 57 transitions. [2022-04-06 20:50:27,203 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 57 transitions. Word has length 47 [2022-04-06 20:50:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:27,203 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 57 transitions. [2022-04-06 20:50:27,203 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 30 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 57 transitions. [2022-04-06 20:50:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-04-06 20:50:27,203 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:27,203 INFO L499 BasicCegarLoop]: trace histogram [28, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:27,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:27,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:27,404 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:27,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:27,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1211412514, now seen corresponding path program 45 times [2022-04-06 20:50:27,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:27,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1948183872] [2022-04-06 20:50:27,413 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:27,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:27,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:27,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1211412514, now seen corresponding path program 46 times [2022-04-06 20:50:27,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:27,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48715488] [2022-04-06 20:50:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:27,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-04-06 20:50:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:27,879 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 3 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:27,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:27,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48715488] [2022-04-06 20:50:27,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48715488] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:27,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53707586] [2022-04-06 20:50:27,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:27,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:27,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:27,883 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:27,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:50:27,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:27,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:27,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:27,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 2 proven. 56 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:50:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:28,276 INFO L134 CoverageAnalysis]: Checked inductivity of 409 backedges. 56 proven. 2 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2022-04-06 20:50:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53707586] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:28,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 6, 6] total 40 [2022-04-06 20:50:28,276 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:28,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1948183872] [2022-04-06 20:50:28,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1948183872] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:28,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:28,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:50:28,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086380074] [2022-04-06 20:50:28,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:28,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:50:28,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:28,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:50:28,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1431, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:50:28,277 INFO L87 Difference]: Start difference. First operand 54 states and 57 transitions. Second operand has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:29,193 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2022-04-06 20:50:29,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:50:29,193 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-04-06 20:50:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:29,194 INFO L225 Difference]: With dead ends: 103 [2022-04-06 20:50:29,194 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:50:29,194 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=301, Invalid=4391, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:50:29,195 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:29,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 118 Invalid, 1220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:50:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:50:29,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 20:50:29,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:29,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-04-06 20:50:29,201 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2022-04-06 20:50:29,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:29,201 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-04-06 20:50:29,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.3125) internal successors, (42), 31 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:29,201 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-04-06 20:50:29,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:50:29,201 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:29,201 INFO L499 BasicCegarLoop]: trace histogram [29, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:29,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:29,401 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:29,402 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:29,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:29,402 INFO L85 PathProgramCache]: Analyzing trace with hash -148635134, now seen corresponding path program 47 times [2022-04-06 20:50:29,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:29,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1118611053] [2022-04-06 20:50:29,412 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:29,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:29,419 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:29,419 INFO L85 PathProgramCache]: Analyzing trace with hash -148635134, now seen corresponding path program 48 times [2022-04-06 20:50:29,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:29,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925320021] [2022-04-06 20:50:29,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:29,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:29,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:29,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-04-06 20:50:29,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:29,931 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 3 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:29,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925320021] [2022-04-06 20:50:29,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925320021] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:29,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844587345] [2022-04-06 20:50:29,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:29,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:29,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:29,935 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:29,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:50:29,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:29,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:29,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:50:29,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-04-06 20:50:30,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-04-06 20:50:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844587345] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:30,234 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:30,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 4] total 37 [2022-04-06 20:50:30,234 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1118611053] [2022-04-06 20:50:30,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1118611053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:30,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:30,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:50:30,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659140173] [2022-04-06 20:50:30,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:30,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:50:30,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:30,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:50:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:50:30,240 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:31,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:31,064 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2022-04-06 20:50:31,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:50:31,064 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 49 [2022-04-06 20:50:31,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:31,065 INFO L225 Difference]: With dead ends: 105 [2022-04-06 20:50:31,065 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 20:50:31,065 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=4140, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:50:31,066 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:31,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 48 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:50:31,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 20:50:31,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 20:50:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 48 states have internal predecessors, (51), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:31,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 59 transitions. [2022-04-06 20:50:31,072 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 59 transitions. Word has length 49 [2022-04-06 20:50:31,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:31,072 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 59 transitions. [2022-04-06 20:50:31,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 32 states have internal predecessors, (43), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:31,072 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 59 transitions. [2022-04-06 20:50:31,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:50:31,072 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:31,073 INFO L499 BasicCegarLoop]: trace histogram [30, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:31,095 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:31,295 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,SelfDestructingSolverStorable33 [2022-04-06 20:50:31,295 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:31,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:31,295 INFO L85 PathProgramCache]: Analyzing trace with hash 639560738, now seen corresponding path program 49 times [2022-04-06 20:50:31,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:31,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829958669] [2022-04-06 20:50:31,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:31,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:31,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash 639560738, now seen corresponding path program 50 times [2022-04-06 20:50:31,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:31,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974805049] [2022-04-06 20:50:31,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:31,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:31,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:31,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:31,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-04-06 20:50:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:31,967 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 3 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:31,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974805049] [2022-04-06 20:50:31,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974805049] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:31,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459690131] [2022-04-06 20:50:31,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:31,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:31,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:31,970 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:31,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:50:32,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:32,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:32,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 2 proven. 60 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-04-06 20:50:32,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 60 proven. 2 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2022-04-06 20:50:32,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459690131] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:32,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:32,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 6, 6] total 42 [2022-04-06 20:50:32,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:32,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829958669] [2022-04-06 20:50:32,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829958669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:32,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:32,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:50:32,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774051923] [2022-04-06 20:50:32,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:32,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:50:32,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:32,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:50:32,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1587, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:50:32,383 INFO L87 Difference]: Start difference. First operand 56 states and 59 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:33,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:33,425 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2022-04-06 20:50:33,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:50:33,426 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 50 [2022-04-06 20:50:33,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:33,426 INFO L225 Difference]: With dead ends: 107 [2022-04-06 20:50:33,426 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:50:33,427 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=319, Invalid=4937, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:50:33,428 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1383 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 1451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:33,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 1451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1383 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:50:33,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:50:33,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 20:50:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 49 states have internal predecessors, (52), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2022-04-06 20:50:33,436 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2022-04-06 20:50:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:33,436 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2022-04-06 20:50:33,436 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:33,436 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2022-04-06 20:50:33,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 20:50:33,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:33,437 INFO L499 BasicCegarLoop]: trace histogram [31, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:33,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:33,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:33,651 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:33,652 INFO L85 PathProgramCache]: Analyzing trace with hash -696171006, now seen corresponding path program 51 times [2022-04-06 20:50:33,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:33,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [680850376] [2022-04-06 20:50:33,660 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:33,672 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:33,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:33,673 INFO L85 PathProgramCache]: Analyzing trace with hash -696171006, now seen corresponding path program 52 times [2022-04-06 20:50:33,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:33,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306885730] [2022-04-06 20:50:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:33,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:33,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:34,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-04-06 20:50:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:34,216 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 3 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:34,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306885730] [2022-04-06 20:50:34,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306885730] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:34,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520085786] [2022-04-06 20:50:34,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:34,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:34,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:34,217 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:34,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:50:34,255 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:34,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:34,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:34,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 2 proven. 62 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-04-06 20:50:34,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:34,634 INFO L134 CoverageAnalysis]: Checked inductivity of 499 backedges. 62 proven. 2 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2022-04-06 20:50:34,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520085786] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:34,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:34,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 6, 6] total 43 [2022-04-06 20:50:34,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:34,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [680850376] [2022-04-06 20:50:34,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [680850376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:34,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:34,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:50:34,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721282205] [2022-04-06 20:50:34,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:34,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:50:34,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:50:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:50:34,635 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:35,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:35,754 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2022-04-06 20:50:35,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:50:35,754 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 51 [2022-04-06 20:50:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:35,754 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:50:35,754 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:50:35,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=328, Invalid=5222, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:50:35,756 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1418 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:35,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 143 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1418 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:50:35,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:50:35,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 20:50:35,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 50 states have internal predecessors, (53), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 61 transitions. [2022-04-06 20:50:35,764 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 61 transitions. Word has length 51 [2022-04-06 20:50:35,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:35,765 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 61 transitions. [2022-04-06 20:50:35,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.2857142857142858) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:35,765 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 61 transitions. [2022-04-06 20:50:35,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:50:35,765 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:35,765 INFO L499 BasicCegarLoop]: trace histogram [32, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:35,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:50:35,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:35,975 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:35,976 INFO L85 PathProgramCache]: Analyzing trace with hash 845817890, now seen corresponding path program 53 times [2022-04-06 20:50:35,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:35,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [719372955] [2022-04-06 20:50:35,984 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:35,990 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:35,990 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:35,990 INFO L85 PathProgramCache]: Analyzing trace with hash 845817890, now seen corresponding path program 54 times [2022-04-06 20:50:35,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:35,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997200242] [2022-04-06 20:50:35,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:35,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:36,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:36,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:36,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:36,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2022-04-06 20:50:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 3 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:36,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:36,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997200242] [2022-04-06 20:50:36,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997200242] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:36,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308864465] [2022-04-06 20:50:36,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:36,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:36,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:36,576 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:36,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:50:36,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:36,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:36,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:36,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:50:36,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:36,982 INFO L134 CoverageAnalysis]: Checked inductivity of 531 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:50:36,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308864465] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:36,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:36,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 6, 6] total 44 [2022-04-06 20:50:36,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:36,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [719372955] [2022-04-06 20:50:36,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [719372955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:36,983 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:36,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:50:36,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279771035] [2022-04-06 20:50:36,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:36,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:50:36,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:36,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:50:36,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:50:36,984 INFO L87 Difference]: Start difference. First operand 58 states and 61 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:38,148 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2022-04-06 20:50:38,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:50:38,151 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 52 [2022-04-06 20:50:38,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:38,152 INFO L225 Difference]: With dead ends: 111 [2022-04-06 20:50:38,152 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 20:50:38,153 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=317, Invalid=5535, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:50:38,153 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1559 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 1630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:38,154 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 168 Invalid, 1630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1559 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:50:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 20:50:38,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-04-06 20:50:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:38,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2022-04-06 20:50:38,161 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2022-04-06 20:50:38,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:38,161 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2022-04-06 20:50:38,161 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 35 states have internal predecessors, (46), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:38,161 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2022-04-06 20:50:38,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:50:38,161 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:38,161 INFO L499 BasicCegarLoop]: trace histogram [33, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:38,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:38,363 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,SelfDestructingSolverStorable36 [2022-04-06 20:50:38,363 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:38,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:38,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1402833410, now seen corresponding path program 55 times [2022-04-06 20:50:38,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:38,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [700241781] [2022-04-06 20:50:38,372 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:38,377 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:38,377 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:38,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1402833410, now seen corresponding path program 56 times [2022-04-06 20:50:38,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:38,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821275353] [2022-04-06 20:50:38,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:38,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:38,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:39,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:39,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-04-06 20:50:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:39,064 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 3 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:39,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:39,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821275353] [2022-04-06 20:50:39,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821275353] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:39,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013135104] [2022-04-06 20:50:39,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:39,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:39,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:39,068 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:39,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:50:39,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:39,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:39,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:39,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 2 proven. 66 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 20:50:39,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:39,564 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 66 proven. 2 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 20:50:39,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013135104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:39,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:39,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 6, 6] total 45 [2022-04-06 20:50:39,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:39,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [700241781] [2022-04-06 20:50:39,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [700241781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:39,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:39,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:50:39,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801936320] [2022-04-06 20:50:39,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:39,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:50:39,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:39,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:50:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=1836, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:50:39,566 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:40,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:40,640 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2022-04-06 20:50:40,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:50:40,641 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 53 [2022-04-06 20:50:40,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:40,641 INFO L225 Difference]: With dead ends: 113 [2022-04-06 20:50:40,641 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:50:40,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=346, Invalid=5816, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:50:40,642 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:40,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 1370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:50:40,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:50:40,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 20:50:40,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 52 states have internal predecessors, (55), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:40,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-04-06 20:50:40,651 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 53 [2022-04-06 20:50:40,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:40,651 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-04-06 20:50:40,651 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 36 states have internal predecessors, (47), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-04-06 20:50:40,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 20:50:40,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:40,652 INFO L499 BasicCegarLoop]: trace histogram [34, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:40,677 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:40,867 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,SelfDestructingSolverStorable37 [2022-04-06 20:50:40,867 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:40,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:40,868 INFO L85 PathProgramCache]: Analyzing trace with hash 1490445346, now seen corresponding path program 57 times [2022-04-06 20:50:40,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:40,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425929516] [2022-04-06 20:50:40,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:40,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:40,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:40,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1490445346, now seen corresponding path program 58 times [2022-04-06 20:50:40,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:40,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591066865] [2022-04-06 20:50:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:40,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:41,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:41,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-04-06 20:50:41,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:41,635 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 3 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:41,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:41,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591066865] [2022-04-06 20:50:41,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591066865] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:41,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116626650] [2022-04-06 20:50:41,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:41,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:41,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:41,637 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:41,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:50:41,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:41,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:41,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:41,910 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 2 proven. 68 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:50:41,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:42,175 INFO L134 CoverageAnalysis]: Checked inductivity of 598 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 528 trivial. 0 not checked. [2022-04-06 20:50:42,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116626650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:42,176 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:42,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 6, 6] total 46 [2022-04-06 20:50:42,176 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:42,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425929516] [2022-04-06 20:50:42,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425929516] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:42,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:42,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:50:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319874102] [2022-04-06 20:50:42,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:42,177 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:50:42,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:42,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:50:42,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1923, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:50:42,178 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:43,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:43,491 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2022-04-06 20:50:43,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:50:43,492 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 54 [2022-04-06 20:50:43,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:43,492 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:50:43,492 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:50:43,493 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=355, Invalid=6125, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:50:43,493 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1742 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:43,493 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 183 Invalid, 1817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1742 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:50:43,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:50:43,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-06 20:50:43,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 53 states have internal predecessors, (56), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:43,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2022-04-06 20:50:43,505 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2022-04-06 20:50:43,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:43,506 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2022-04-06 20:50:43,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:43,506 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2022-04-06 20:50:43,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:50:43,506 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:43,506 INFO L499 BasicCegarLoop]: trace histogram [35, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:43,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:50:43,706 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,SelfDestructingSolverStorable38 [2022-04-06 20:50:43,707 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:43,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:43,707 INFO L85 PathProgramCache]: Analyzing trace with hash -88551934, now seen corresponding path program 59 times [2022-04-06 20:50:43,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:43,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [305516575] [2022-04-06 20:50:43,717 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:43,724 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:43,724 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:43,724 INFO L85 PathProgramCache]: Analyzing trace with hash -88551934, now seen corresponding path program 60 times [2022-04-06 20:50:43,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:43,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336908638] [2022-04-06 20:50:43,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:43,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:43,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:44,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-04-06 20:50:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 3 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336908638] [2022-04-06 20:50:44,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336908638] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:44,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095050318] [2022-04-06 20:50:44,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:44,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:44,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:44,438 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:44,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:50:44,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:44,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:44,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:50:44,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 20:50:44,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 20:50:44,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095050318] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:44,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:44,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 6, 6] total 45 [2022-04-06 20:50:44,838 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:44,839 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [305516575] [2022-04-06 20:50:44,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [305516575] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:44,839 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:44,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:50:44,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530045336] [2022-04-06 20:50:44,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:44,840 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:50:44,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:44,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:50:44,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1856, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:50:44,841 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:46,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:46,076 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2022-04-06 20:50:46,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:50:46,077 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 55 [2022-04-06 20:50:46,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:46,077 INFO L225 Difference]: With dead ends: 117 [2022-04-06 20:50:46,077 INFO L226 Difference]: Without dead ends: 63 [2022-04-06 20:50:46,078 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=338, Invalid=6142, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:50:46,078 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:46,078 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 63 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:50:46,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-04-06 20:50:46,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2022-04-06 20:50:46,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 54 states have internal predecessors, (57), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2022-04-06 20:50:46,088 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 55 [2022-04-06 20:50:46,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:46,088 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2022-04-06 20:50:46,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2022-04-06 20:50:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:50:46,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:46,088 INFO L499 BasicCegarLoop]: trace histogram [36, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:46,113 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:46,311 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,SelfDestructingSolverStorable39 [2022-04-06 20:50:46,311 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:46,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:46,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1792827358, now seen corresponding path program 61 times [2022-04-06 20:50:46,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:46,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1714655366] [2022-04-06 20:50:46,320 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:46,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:46,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:46,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1792827358, now seen corresponding path program 62 times [2022-04-06 20:50:46,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:46,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878786779] [2022-04-06 20:50:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:46,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:47,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:47,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-04-06 20:50:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 3 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:47,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:47,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878786779] [2022-04-06 20:50:47,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878786779] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:47,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963917251] [2022-04-06 20:50:47,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:47,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:47,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:47,139 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:47,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:50:47,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:47,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:47,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:47,427 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 20:50:47,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:47,683 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 72 proven. 2 refuted. 0 times theorem prover too weak. 595 trivial. 0 not checked. [2022-04-06 20:50:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963917251] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:47,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:47,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 6, 6] total 48 [2022-04-06 20:50:47,684 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:47,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1714655366] [2022-04-06 20:50:47,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1714655366] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:47,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:47,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:50:47,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525921118] [2022-04-06 20:50:47,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:47,684 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:50:47,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:47,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:50:47,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2103, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:50:47,685 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 39 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:49,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:49,013 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2022-04-06 20:50:49,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:50:49,013 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 39 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 56 [2022-04-06 20:50:49,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:49,014 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:50:49,014 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:50:49,015 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=373, Invalid=6767, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:50:49,016 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1888 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:49,016 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 183 Invalid, 1967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1888 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:50:49,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:50:49,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 20:50:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:49,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2022-04-06 20:50:49,023 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2022-04-06 20:50:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:49,023 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2022-04-06 20:50:49,023 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 39 states have internal predecessors, (50), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:49,023 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2022-04-06 20:50:49,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 20:50:49,023 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:49,023 INFO L499 BasicCegarLoop]: trace histogram [37, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:49,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:49,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:49,224 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:49,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1209209346, now seen corresponding path program 63 times [2022-04-06 20:50:49,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:49,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1774030327] [2022-04-06 20:50:49,248 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:49,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:49,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:49,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1209209346, now seen corresponding path program 64 times [2022-04-06 20:50:49,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299026528] [2022-04-06 20:50:49,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:50,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:50,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-04-06 20:50:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:50,048 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 3 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:50,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299026528] [2022-04-06 20:50:50,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299026528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:50,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403175822] [2022-04-06 20:50:50,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:50,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:50,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:50,051 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:50,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:50:50,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:50,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:50,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:50,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 20:50:50,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:50,550 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 74 proven. 2 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2022-04-06 20:50:50,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403175822] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:50,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:50,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 6, 6] total 49 [2022-04-06 20:50:50,550 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:50,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1774030327] [2022-04-06 20:50:50,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1774030327] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:50,550 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:50,550 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:50:50,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942780408] [2022-04-06 20:50:50,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:50,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:50:50,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:50,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:50:50,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2196, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:50:50,551 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 40 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:51,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:51,866 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2022-04-06 20:50:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:50:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 40 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 57 [2022-04-06 20:50:51,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:51,867 INFO L225 Difference]: With dead ends: 121 [2022-04-06 20:50:51,867 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:50:51,867 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=382, Invalid=7100, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:50:51,868 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1648 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1730 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 1648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:51,868 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 78 Invalid, 1730 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 1648 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:50:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:50:51,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-06 20:50:51,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:51,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-04-06 20:50:51,876 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 57 [2022-04-06 20:50:51,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:51,876 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-04-06 20:50:51,877 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 40 states have internal predecessors, (51), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:51,877 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-04-06 20:50:51,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:50:51,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:51,877 INFO L499 BasicCegarLoop]: trace histogram [38, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:51,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:52,079 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,SelfDestructingSolverStorable41 [2022-04-06 20:50:52,079 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:52,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:52,080 INFO L85 PathProgramCache]: Analyzing trace with hash -216933342, now seen corresponding path program 65 times [2022-04-06 20:50:52,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:52,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [228743539] [2022-04-06 20:50:52,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:52,102 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:52,102 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:52,102 INFO L85 PathProgramCache]: Analyzing trace with hash -216933342, now seen corresponding path program 66 times [2022-04-06 20:50:52,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:52,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781779362] [2022-04-06 20:50:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:52,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:52,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-04-06 20:50:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:52,912 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 3 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:52,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781779362] [2022-04-06 20:50:52,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781779362] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:52,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426637957] [2022-04-06 20:50:52,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:52,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:52,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:52,915 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:52,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:50:52,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:50:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:52,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 20:50:53,158 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:53,381 INFO L134 CoverageAnalysis]: Checked inductivity of 744 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 20:50:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426637957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:53,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:53,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 6, 6] total 50 [2022-04-06 20:50:53,381 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:53,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [228743539] [2022-04-06 20:50:53,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [228743539] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:53,381 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:53,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:50:53,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884501462] [2022-04-06 20:50:53,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:53,382 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:50:53,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:53,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:50:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=2311, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:50:53,382 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:54,723 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2022-04-06 20:50:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:50:54,723 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 58 [2022-04-06 20:50:54,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:54,724 INFO L225 Difference]: With dead ends: 123 [2022-04-06 20:50:54,724 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 20:50:54,725 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=371, Invalid=7461, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:50:54,725 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1651 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:54,726 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 1735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1651 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:50:54,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 20:50:54,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2022-04-06 20:50:54,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 57 states have internal predecessors, (60), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:54,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-04-06 20:50:54,732 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2022-04-06 20:50:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:54,732 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-04-06 20:50:54,733 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-04-06 20:50:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:50:54,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:54,733 INFO L499 BasicCegarLoop]: trace histogram [39, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:54,752 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 20:50:54,942 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,SelfDestructingSolverStorable42 [2022-04-06 20:50:54,942 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:54,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1477683710, now seen corresponding path program 67 times [2022-04-06 20:50:54,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:54,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [755552969] [2022-04-06 20:50:54,951 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:54,967 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:54,967 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:54,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1477683710, now seen corresponding path program 68 times [2022-04-06 20:50:54,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:54,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606774867] [2022-04-06 20:50:54,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:55,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:55,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:55,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-04-06 20:50:55,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:55,800 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 3 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:55,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606774867] [2022-04-06 20:50:55,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606774867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:55,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827971833] [2022-04-06 20:50:55,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:55,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:55,802 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:55,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:50:55,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:55,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:55,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:56,043 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 2 proven. 78 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 20:50:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:56,308 INFO L134 CoverageAnalysis]: Checked inductivity of 783 backedges. 78 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-04-06 20:50:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827971833] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:56,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 6, 6] total 51 [2022-04-06 20:50:56,309 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:56,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [755552969] [2022-04-06 20:50:56,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [755552969] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:56,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:56,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:50:56,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142877318] [2022-04-06 20:50:56,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:56,309 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:50:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:56,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:50:56,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2388, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:50:56,310 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:57,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:57,800 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2022-04-06 20:50:57,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:50:57,801 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 59 [2022-04-06 20:50:57,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:57,801 INFO L225 Difference]: With dead ends: 125 [2022-04-06 20:50:57,801 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:50:57,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 890 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=400, Invalid=7790, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:50:57,802 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1836 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 1836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:57,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 88 Invalid, 1922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 1836 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:50:57,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:50:57,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 20:50:57,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 58 states have internal predecessors, (61), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:50:57,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2022-04-06 20:50:57,809 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 59 [2022-04-06 20:50:57,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:57,809 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2022-04-06 20:50:57,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:50:57,809 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2022-04-06 20:50:57,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-04-06 20:50:57,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:57,809 INFO L499 BasicCegarLoop]: trace histogram [40, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:57,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 20:50:58,010 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,SelfDestructingSolverStorable43 [2022-04-06 20:50:58,010 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:58,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:58,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1906239454, now seen corresponding path program 69 times [2022-04-06 20:50:58,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:58,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [148157567] [2022-04-06 20:50:58,019 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:58,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:58,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:58,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1906239454, now seen corresponding path program 70 times [2022-04-06 20:50:58,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:58,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299492687] [2022-04-06 20:50:58,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:58,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:58,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:58,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:58,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:58,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2022-04-06 20:50:58,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:58,866 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 3 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:58,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299492687] [2022-04-06 20:50:58,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299492687] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:58,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408070933] [2022-04-06 20:50:58,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:58,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:58,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:58,867 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:58,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:50:58,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:58,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:50:58,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 2 proven. 80 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 20:50:59,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:59,366 INFO L134 CoverageAnalysis]: Checked inductivity of 823 backedges. 80 proven. 2 refuted. 0 times theorem prover too weak. 741 trivial. 0 not checked. [2022-04-06 20:50:59,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408070933] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:59,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:59,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 6, 6] total 52 [2022-04-06 20:50:59,366 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:59,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [148157567] [2022-04-06 20:50:59,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [148157567] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:59,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:59,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:50:59,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189744292] [2022-04-06 20:50:59,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:59,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:50:59,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:59,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:50:59,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2487, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:50:59,368 INFO L87 Difference]: Start difference. First operand 66 states and 69 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 43 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:00,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:00,817 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2022-04-06 20:51:00,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:51:00,817 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 43 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 60 [2022-04-06 20:51:00,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:00,817 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:51:00,817 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:51:00,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=409, Invalid=8147, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:51:00,819 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1768 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:00,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 1856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1768 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:51:00,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:51:00,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 20:51:00,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 59 states have internal predecessors, (62), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:00,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2022-04-06 20:51:00,826 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2022-04-06 20:51:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:00,826 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2022-04-06 20:51:00,826 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 43 states have internal predecessors, (54), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:00,826 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2022-04-06 20:51:00,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:51:00,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:00,827 INFO L499 BasicCegarLoop]: trace histogram [41, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:00,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 20:51:01,028 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:01,028 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:01,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:01,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1988401666, now seen corresponding path program 71 times [2022-04-06 20:51:01,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:01,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [561773834] [2022-04-06 20:51:01,037 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:01,046 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:01,047 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:01,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1988401666, now seen corresponding path program 72 times [2022-04-06 20:51:01,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:01,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62670155] [2022-04-06 20:51:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:01,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:01,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-04-06 20:51:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:01,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62670155] [2022-04-06 20:51:01,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62670155] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:01,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101758774] [2022-04-06 20:51:01,987 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:01,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:01,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:01,988 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:01,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:51:02,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:02,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:02,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:51:02,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:02,164 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-04-06 20:51:02,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-04-06 20:51:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101758774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:02,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:02,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 4, 4] total 49 [2022-04-06 20:51:02,330 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:02,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [561773834] [2022-04-06 20:51:02,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [561773834] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:02,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:02,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:51:02,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596296124] [2022-04-06 20:51:02,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:02,331 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:51:02,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:02,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:51:02,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:51:02,331 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:03,949 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2022-04-06 20:51:03,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:51:03,950 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 61 [2022-04-06 20:51:03,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:03,950 INFO L225 Difference]: With dead ends: 129 [2022-04-06 20:51:03,950 INFO L226 Difference]: Without dead ends: 69 [2022-04-06 20:51:03,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=390, Invalid=7800, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:51:03,951 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:03,952 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 193 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:51:03,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-04-06 20:51:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2022-04-06 20:51:03,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 60 states have internal predecessors, (63), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:03,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 71 transitions. [2022-04-06 20:51:03,959 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 71 transitions. Word has length 61 [2022-04-06 20:51:03,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:03,960 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 71 transitions. [2022-04-06 20:51:03,960 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 44 states have internal predecessors, (55), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 71 transitions. [2022-04-06 20:51:03,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:51:03,960 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:03,960 INFO L499 BasicCegarLoop]: trace histogram [42, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:03,976 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 20:51:04,160 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:04,161 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:04,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:04,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1831775198, now seen corresponding path program 73 times [2022-04-06 20:51:04,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:04,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1850139558] [2022-04-06 20:51:04,169 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:04,176 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:04,176 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:04,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1831775198, now seen corresponding path program 74 times [2022-04-06 20:51:04,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:04,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962239714] [2022-04-06 20:51:04,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:04,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:04,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:05,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:05,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-04-06 20:51:05,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 3 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:05,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962239714] [2022-04-06 20:51:05,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962239714] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:05,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633648605] [2022-04-06 20:51:05,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:05,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:05,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:05,050 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:05,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:51:05,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:05,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:05,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:05,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:05,302 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 2 proven. 84 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-04-06 20:51:05,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 906 backedges. 84 proven. 2 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2022-04-06 20:51:05,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633648605] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:05,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:05,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 6, 6] total 54 [2022-04-06 20:51:05,575 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:05,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1850139558] [2022-04-06 20:51:05,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1850139558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:05,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:05,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:51:05,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343510977] [2022-04-06 20:51:05,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:05,575 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:51:05,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:51:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=2691, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:51:05,576 INFO L87 Difference]: Start difference. First operand 68 states and 71 transitions. Second operand has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:07,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:07,225 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2022-04-06 20:51:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:51:07,225 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-04-06 20:51:07,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:07,226 INFO L225 Difference]: With dead ends: 131 [2022-04-06 20:51:07,226 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:51:07,227 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1019 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=427, Invalid=8885, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:51:07,227 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 2015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:07,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 2015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:51:07,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:51:07,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 20:51:07,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 61 states have internal predecessors, (64), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2022-04-06 20:51:07,238 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2022-04-06 20:51:07,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:07,238 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2022-04-06 20:51:07,238 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2022-04-06 20:51:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 20:51:07,238 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:07,239 INFO L499 BasicCegarLoop]: trace histogram [43, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:07,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:07,439 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,SelfDestructingSolverStorable46 [2022-04-06 20:51:07,439 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:07,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1826306, now seen corresponding path program 75 times [2022-04-06 20:51:07,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:07,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [335864297] [2022-04-06 20:51:07,452 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:07,461 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:07,461 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:07,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1826306, now seen corresponding path program 76 times [2022-04-06 20:51:07,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:07,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996288889] [2022-04-06 20:51:07,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:07,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:08,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:08,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:08,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-04-06 20:51:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:08,394 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 3 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:08,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:08,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996288889] [2022-04-06 20:51:08,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996288889] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:08,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661775798] [2022-04-06 20:51:08,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:08,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:08,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:08,399 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:08,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:51:08,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:08,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:08,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:08,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 2 proven. 86 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-04-06 20:51:08,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:08,956 INFO L134 CoverageAnalysis]: Checked inductivity of 949 backedges. 86 proven. 2 refuted. 0 times theorem prover too weak. 861 trivial. 0 not checked. [2022-04-06 20:51:08,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661775798] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:08,956 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:08,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 6, 6] total 55 [2022-04-06 20:51:08,956 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:08,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [335864297] [2022-04-06 20:51:08,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [335864297] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:08,956 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:08,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:51:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621195153] [2022-04-06 20:51:08,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:08,957 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:51:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:51:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=2796, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:51:08,957 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:10,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:10,605 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2022-04-06 20:51:10,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:51:10,605 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 63 [2022-04-06 20:51:10,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:10,606 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:51:10,606 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:51:10,607 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=436, Invalid=9266, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:51:10,608 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:10,608 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 68 Invalid, 2210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:51:10,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:51:10,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-06 20:51:10,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 62 states have internal predecessors, (65), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:10,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-04-06 20:51:10,617 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 63 [2022-04-06 20:51:10,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:10,617 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-04-06 20:51:10,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 46 states have internal predecessors, (57), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:10,618 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-04-06 20:51:10,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:51:10,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:10,618 INFO L499 BasicCegarLoop]: trace histogram [44, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:10,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 20:51:10,831 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,SelfDestructingSolverStorable47 [2022-04-06 20:51:10,831 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:10,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:10,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1008898082, now seen corresponding path program 77 times [2022-04-06 20:51:10,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:10,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1942738140] [2022-04-06 20:51:10,840 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:10,855 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:10,855 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:10,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1008898082, now seen corresponding path program 78 times [2022-04-06 20:51:10,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:10,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329255036] [2022-04-06 20:51:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:10,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:10,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-04-06 20:51:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 3 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:11,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:11,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329255036] [2022-04-06 20:51:11,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329255036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:11,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256339854] [2022-04-06 20:51:11,895 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:11,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:11,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:11,897 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:11,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:51:11,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:11,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:11,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:11,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:12,158 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 20:51:12,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:12,409 INFO L134 CoverageAnalysis]: Checked inductivity of 993 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 20:51:12,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256339854] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:12,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:12,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 6, 6] total 56 [2022-04-06 20:51:12,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:12,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1942738140] [2022-04-06 20:51:12,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1942738140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:12,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:12,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:51:12,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536712328] [2022-04-06 20:51:12,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:12,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:51:12,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:12,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:51:12,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2923, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:51:12,410 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:14,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:14,302 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2022-04-06 20:51:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:51:14,302 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 64 [2022-04-06 20:51:14,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:14,303 INFO L225 Difference]: With dead ends: 135 [2022-04-06 20:51:14,303 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 20:51:14,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1005 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=425, Invalid=9675, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:51:14,304 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2642 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:14,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 213 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2642 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:51:14,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 20:51:14,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-04-06 20:51:14,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 62 states have (on average 1.064516129032258) internal successors, (66), 63 states have internal predecessors, (66), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2022-04-06 20:51:14,314 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2022-04-06 20:51:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:14,314 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2022-04-06 20:51:14,315 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2022-04-06 20:51:14,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:51:14,315 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:14,315 INFO L499 BasicCegarLoop]: trace histogram [45, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:14,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:14,535 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,SelfDestructingSolverStorable48 [2022-04-06 20:51:14,535 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:14,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:14,536 INFO L85 PathProgramCache]: Analyzing trace with hash -2131615230, now seen corresponding path program 79 times [2022-04-06 20:51:14,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:14,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694115779] [2022-04-06 20:51:14,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:14,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:14,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:14,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2131615230, now seen corresponding path program 80 times [2022-04-06 20:51:14,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:14,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541670578] [2022-04-06 20:51:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:14,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:15,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-04-06 20:51:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:15,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 3 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:15,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541670578] [2022-04-06 20:51:15,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541670578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:15,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646980163] [2022-04-06 20:51:15,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:15,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:15,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:15,556 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) [2022-04-06 20:51:15,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:51:15,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:15,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:15,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:15,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 2 proven. 90 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-04-06 20:51:15,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 1038 backedges. 90 proven. 2 refuted. 0 times theorem prover too weak. 946 trivial. 0 not checked. [2022-04-06 20:51:16,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646980163] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:16,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:16,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 6, 6] total 57 [2022-04-06 20:51:16,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:16,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694115779] [2022-04-06 20:51:16,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694115779] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:16,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:16,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:51:16,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831679447] [2022-04-06 20:51:16,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:16,092 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:51:16,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:16,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:51:16,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3012, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:51:16,093 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:18,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:18,070 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2022-04-06 20:51:18,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:51:18,070 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 65 [2022-04-06 20:51:18,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:18,070 INFO L225 Difference]: With dead ends: 137 [2022-04-06 20:51:18,071 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:51:18,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=454, Invalid=10052, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:51:18,072 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2809 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 2906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:18,072 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 238 Invalid, 2906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2809 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:51:18,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:51:18,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-06 20:51:18,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 64 states have internal predecessors, (67), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:18,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2022-04-06 20:51:18,082 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 65 [2022-04-06 20:51:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:18,082 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2022-04-06 20:51:18,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 48 states have internal predecessors, (59), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:18,082 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2022-04-06 20:51:18,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 20:51:18,082 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:18,082 INFO L499 BasicCegarLoop]: trace histogram [46, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:18,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-04-06 20:51:18,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:18,303 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:18,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:18,304 INFO L85 PathProgramCache]: Analyzing trace with hash -703280094, now seen corresponding path program 81 times [2022-04-06 20:51:18,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [917139091] [2022-04-06 20:51:18,312 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:18,322 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:18,322 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:18,322 INFO L85 PathProgramCache]: Analyzing trace with hash -703280094, now seen corresponding path program 82 times [2022-04-06 20:51:18,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:18,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968726678] [2022-04-06 20:51:18,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:18,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:19,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:19,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:19,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-04-06 20:51:19,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:19,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 3 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:19,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968726678] [2022-04-06 20:51:19,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968726678] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:19,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121903076] [2022-04-06 20:51:19,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:19,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:19,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:19,356 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) [2022-04-06 20:51:19,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:51:19,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:19,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 2 proven. 92 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 20:51:19,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:19,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1084 backedges. 92 proven. 2 refuted. 0 times theorem prover too weak. 990 trivial. 0 not checked. [2022-04-06 20:51:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121903076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:19,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:19,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 6, 6] total 58 [2022-04-06 20:51:19,908 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:19,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [917139091] [2022-04-06 20:51:19,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [917139091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:19,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:19,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:51:19,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210161932] [2022-04-06 20:51:19,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:19,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:51:19,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:19,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:51:19,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3123, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:51:19,909 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:21,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:21,845 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2022-04-06 20:51:21,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:51:21,848 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 66 [2022-04-06 20:51:21,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:21,849 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:51:21,849 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:51:21,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=463, Invalid=10457, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:51:21,851 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2678 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 2777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 2678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:21,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 163 Invalid, 2777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 2678 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:51:21,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:51:21,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-04-06 20:51:21,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 64 states have (on average 1.0625) internal successors, (68), 65 states have internal predecessors, (68), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:21,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2022-04-06 20:51:21,864 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2022-04-06 20:51:21,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:21,865 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2022-04-06 20:51:21,865 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.2) internal successors, (60), 49 states have internal predecessors, (60), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:21,865 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2022-04-06 20:51:21,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:51:21,865 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:21,865 INFO L499 BasicCegarLoop]: trace histogram [47, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:21,891 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:22,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:22,083 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:22,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:22,084 INFO L85 PathProgramCache]: Analyzing trace with hash 625436162, now seen corresponding path program 83 times [2022-04-06 20:51:22,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:22,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901623313] [2022-04-06 20:51:22,095 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:22,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:22,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:22,105 INFO L85 PathProgramCache]: Analyzing trace with hash 625436162, now seen corresponding path program 84 times [2022-04-06 20:51:22,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:22,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934109479] [2022-04-06 20:51:22,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:22,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:22,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:23,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:23,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:23,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-04-06 20:51:23,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:23,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 3 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:23,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934109479] [2022-04-06 20:51:23,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934109479] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:23,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528852276] [2022-04-06 20:51:23,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:23,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:23,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:23,174 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) [2022-04-06 20:51:23,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:51:23,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:23,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:23,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:23,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-04-06 20:51:23,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1131 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-04-06 20:51:23,745 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528852276] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:23,746 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:23,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 6, 6] total 59 [2022-04-06 20:51:23,746 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:23,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901623313] [2022-04-06 20:51:23,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901623313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:23,746 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:23,746 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:51:23,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540892833] [2022-04-06 20:51:23,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:23,747 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:51:23,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:23,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:51:23,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=3256, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:51:23,747 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:25,690 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2022-04-06 20:51:25,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:51:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 67 [2022-04-06 20:51:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:25,691 INFO L225 Difference]: With dead ends: 141 [2022-04-06 20:51:25,691 INFO L226 Difference]: Without dead ends: 75 [2022-04-06 20:51:25,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1143 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=452, Invalid=10890, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:51:25,692 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2443 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:25,692 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 2545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2443 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:51:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-04-06 20:51:25,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2022-04-06 20:51:25,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 66 states have internal predecessors, (69), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2022-04-06 20:51:25,700 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 67 [2022-04-06 20:51:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:25,700 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2022-04-06 20:51:25,700 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2022-04-06 20:51:25,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:51:25,700 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:25,700 INFO L499 BasicCegarLoop]: trace histogram [48, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:25,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:25,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:25,901 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:25,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:25,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1134032862, now seen corresponding path program 85 times [2022-04-06 20:51:25,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:25,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1335280302] [2022-04-06 20:51:25,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:25,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:25,919 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:25,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1134032862, now seen corresponding path program 86 times [2022-04-06 20:51:25,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:25,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440347395] [2022-04-06 20:51:25,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:25,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:25,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2022-04-06 20:51:27,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:27,078 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 3 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:27,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:27,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440347395] [2022-04-06 20:51:27,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440347395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:27,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637744505] [2022-04-06 20:51:27,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:27,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:27,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:27,083 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) [2022-04-06 20:51:27,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:51:27,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:27,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:27,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:27,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:27,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-04-06 20:51:27,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:27,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1179 backedges. 96 proven. 2 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2022-04-06 20:51:27,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637744505] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:27,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:27,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 6, 6] total 60 [2022-04-06 20:51:27,714 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:27,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1335280302] [2022-04-06 20:51:27,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1335280302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:27,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:27,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:51:27,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24908514] [2022-04-06 20:51:27,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:27,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:51:27,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:51:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=3351, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:51:27,715 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 52 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 51 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:29,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:29,907 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2022-04-06 20:51:29,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:51:29,907 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 51 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 68 [2022-04-06 20:51:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:29,908 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:51:29,908 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:51:29,909 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=481, Invalid=11291, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:51:29,909 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:29,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 238 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 3097 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:51:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:51:29,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-04-06 20:51:29,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 67 states have internal predecessors, (70), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:29,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-04-06 20:51:29,919 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2022-04-06 20:51:29,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:29,919 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-04-06 20:51:29,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 51 states have internal predecessors, (62), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:29,919 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-04-06 20:51:29,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 20:51:29,920 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:29,920 INFO L499 BasicCegarLoop]: trace histogram [49, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:29,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:30,120 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,SelfDestructingSolverStorable52 [2022-04-06 20:51:30,120 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:30,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 157002242, now seen corresponding path program 87 times [2022-04-06 20:51:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1904009114] [2022-04-06 20:51:30,129 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:30,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:30,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:30,137 INFO L85 PathProgramCache]: Analyzing trace with hash 157002242, now seen corresponding path program 88 times [2022-04-06 20:51:30,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:30,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877984867] [2022-04-06 20:51:30,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:30,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:31,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-04-06 20:51:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 3 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877984867] [2022-04-06 20:51:31,282 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877984867] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:31,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591308506] [2022-04-06 20:51:31,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:31,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:31,283 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) [2022-04-06 20:51:31,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:51:31,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:31,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:31,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:31,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:31,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 2 proven. 98 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-04-06 20:51:31,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:31,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1228 backedges. 98 proven. 2 refuted. 0 times theorem prover too weak. 1128 trivial. 0 not checked. [2022-04-06 20:51:31,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591308506] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:31,907 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:31,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 6, 6] total 61 [2022-04-06 20:51:31,907 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:31,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1904009114] [2022-04-06 20:51:31,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1904009114] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:31,908 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:31,908 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:51:31,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984846319] [2022-04-06 20:51:31,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:31,908 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:51:31,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:31,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:51:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=3468, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:51:31,909 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 52 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:34,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:34,063 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2022-04-06 20:51:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:51:34,064 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 52 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 69 [2022-04-06 20:51:34,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:34,064 INFO L225 Difference]: With dead ends: 145 [2022-04-06 20:51:34,064 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:51:34,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=490, Invalid=11720, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:51:34,066 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3032 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 3137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 3032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:34,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 183 Invalid, 3137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 3032 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:51:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:51:34,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-04-06 20:51:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 68 states have internal predecessors, (71), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:34,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-04-06 20:51:34,077 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 69 [2022-04-06 20:51:34,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:34,077 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-04-06 20:51:34,077 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 52 states have internal predecessors, (63), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:34,077 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-04-06 20:51:34,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 20:51:34,077 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:34,078 INFO L499 BasicCegarLoop]: trace histogram [50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:34,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-04-06 20:51:34,291 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,SelfDestructingSolverStorable53 [2022-04-06 20:51:34,291 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:34,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:34,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1524384802, now seen corresponding path program 89 times [2022-04-06 20:51:34,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:34,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [717020669] [2022-04-06 20:51:34,300 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:34,313 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:34,313 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:34,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1524384802, now seen corresponding path program 90 times [2022-04-06 20:51:34,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:34,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43170822] [2022-04-06 20:51:34,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:34,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:34,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:35,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:35,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-04-06 20:51:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:35,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 3 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43170822] [2022-04-06 20:51:35,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43170822] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:35,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529960555] [2022-04-06 20:51:35,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:35,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:35,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:35,483 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) [2022-04-06 20:51:35,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:51:35,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:35,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:35,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:35,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 20:51:35,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 20:51:36,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529960555] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:36,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:36,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 6, 6] total 62 [2022-04-06 20:51:36,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:36,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [717020669] [2022-04-06 20:51:36,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [717020669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:36,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:36,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:51:36,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139974801] [2022-04-06 20:51:36,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:36,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:51:36,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:36,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:51:36,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=3607, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:51:36,067 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:38,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:38,286 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2022-04-06 20:51:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:51:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-04-06 20:51:38,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:38,287 INFO L225 Difference]: With dead ends: 147 [2022-04-06 20:51:38,287 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 20:51:38,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1290 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=479, Invalid=12177, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 20:51:38,289 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2984 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 3091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:38,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 133 Invalid, 3091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2984 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:51:38,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 20:51:38,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2022-04-06 20:51:38,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 69 states have internal predecessors, (72), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:38,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2022-04-06 20:51:38,295 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2022-04-06 20:51:38,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:38,295 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2022-04-06 20:51:38,295 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2022-04-06 20:51:38,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:51:38,296 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:38,296 INFO L499 BasicCegarLoop]: trace histogram [51, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:38,300 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:38,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:38,497 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:38,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:38,497 INFO L85 PathProgramCache]: Analyzing trace with hash 963571202, now seen corresponding path program 91 times [2022-04-06 20:51:38,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:38,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1854495276] [2022-04-06 20:51:38,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:38,515 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:38,515 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:38,515 INFO L85 PathProgramCache]: Analyzing trace with hash 963571202, now seen corresponding path program 92 times [2022-04-06 20:51:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:38,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298637261] [2022-04-06 20:51:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:38,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:39,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-04-06 20:51:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,819 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 3 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:39,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298637261] [2022-04-06 20:51:39,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298637261] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:39,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299213263] [2022-04-06 20:51:39,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:39,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:39,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:39,824 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) [2022-04-06 20:51:39,830 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:51:39,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:39,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:39,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:39,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 20:51:40,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:40,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1329 backedges. 102 proven. 2 refuted. 0 times theorem prover too weak. 1225 trivial. 0 not checked. [2022-04-06 20:51:40,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [299213263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:40,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:40,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6, 6] total 63 [2022-04-06 20:51:40,430 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:40,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1854495276] [2022-04-06 20:51:40,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1854495276] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:40,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:40,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:51:40,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734713839] [2022-04-06 20:51:40,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:40,431 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:51:40,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:40,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:51:40,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=3708, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:51:40,432 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 54 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:42,625 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2022-04-06 20:51:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:51:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 54 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 71 [2022-04-06 20:51:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:42,626 INFO L225 Difference]: With dead ends: 149 [2022-04-06 20:51:42,626 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 20:51:42,627 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=508, Invalid=12602, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:51:42,628 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2863 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:42,628 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 58 Invalid, 2972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2863 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:51:42,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 20:51:42,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 20:51:42,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 70 states have internal predecessors, (73), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 81 transitions. [2022-04-06 20:51:42,638 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 81 transitions. Word has length 71 [2022-04-06 20:51:42,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:42,638 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 81 transitions. [2022-04-06 20:51:42,639 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 54 states have internal predecessors, (65), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 81 transitions. [2022-04-06 20:51:42,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 20:51:42,639 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:42,639 INFO L499 BasicCegarLoop]: trace histogram [52, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:42,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 20:51:42,855 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,SelfDestructingSolverStorable55 [2022-04-06 20:51:42,855 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:42,856 INFO L85 PathProgramCache]: Analyzing trace with hash 758218786, now seen corresponding path program 93 times [2022-04-06 20:51:42,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:42,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402963939] [2022-04-06 20:51:42,864 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:42,880 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:42,881 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:42,881 INFO L85 PathProgramCache]: Analyzing trace with hash 758218786, now seen corresponding path program 94 times [2022-04-06 20:51:42,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:42,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989896705] [2022-04-06 20:51:42,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:42,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:44,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-04-06 20:51:44,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:44,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 3 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:44,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989896705] [2022-04-06 20:51:44,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989896705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:44,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761416826] [2022-04-06 20:51:44,203 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:44,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:44,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:44,212 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) [2022-04-06 20:51:44,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:51:44,270 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:44,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:44,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:44,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:44,526 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 2 proven. 104 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 20:51:44,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1381 backedges. 104 proven. 2 refuted. 0 times theorem prover too weak. 1275 trivial. 0 not checked. [2022-04-06 20:51:44,835 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761416826] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:44,835 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:44,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 6, 6] total 64 [2022-04-06 20:51:44,836 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:44,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402963939] [2022-04-06 20:51:44,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402963939] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:44,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:44,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:51:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966232797] [2022-04-06 20:51:44,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:44,836 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:51:44,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:44,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:51:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3831, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:51:44,837 INFO L87 Difference]: Start difference. First operand 78 states and 81 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 55 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:47,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:47,133 INFO L93 Difference]: Finished difference Result 151 states and 158 transitions. [2022-04-06 20:51:47,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:51:47,135 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 55 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 72 [2022-04-06 20:51:47,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:47,136 INFO L225 Difference]: With dead ends: 151 [2022-04-06 20:51:47,136 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:51:47,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1514 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=517, Invalid=13055, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:51:47,137 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3088 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 3200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 3088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:47,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 98 Invalid, 3200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 3088 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:51:47,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:51:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 20:51:47,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 71 states have internal predecessors, (74), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2022-04-06 20:51:47,148 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2022-04-06 20:51:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:47,148 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2022-04-06 20:51:47,148 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 55 states have internal predecessors, (66), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2022-04-06 20:51:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:51:47,149 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:47,149 INFO L499 BasicCegarLoop]: trace histogram [53, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:47,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:47,363 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,SelfDestructingSolverStorable56 [2022-04-06 20:51:47,363 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:47,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1312738814, now seen corresponding path program 95 times [2022-04-06 20:51:47,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:47,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2060597818] [2022-04-06 20:51:47,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:47,389 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:47,389 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:47,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1312738814, now seen corresponding path program 96 times [2022-04-06 20:51:47,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:47,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707608422] [2022-04-06 20:51:47,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:47,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-04-06 20:51:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 3 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:48,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707608422] [2022-04-06 20:51:48,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707608422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:48,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628922797] [2022-04-06 20:51:48,687 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:48,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:48,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:48,688 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) [2022-04-06 20:51:48,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:51:48,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:51:48,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:48,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:51:48,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-04-06 20:51:48,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1434 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-04-06 20:51:49,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628922797] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:49,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:49,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 6, 6] total 63 [2022-04-06 20:51:49,205 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:49,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2060597818] [2022-04-06 20:51:49,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2060597818] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:49,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:49,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:51:49,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650923468] [2022-04-06 20:51:49,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:49,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:51:49,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:49,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:51:49,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3728, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:51:49,206 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand has 57 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:51,509 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2022-04-06 20:51:51,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:51:51,509 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 73 [2022-04-06 20:51:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:51,509 INFO L225 Difference]: With dead ends: 153 [2022-04-06 20:51:51,509 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 20:51:51,510 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1440 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=500, Invalid=13072, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:51:51,510 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3016 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:51,511 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 38 Invalid, 3130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3016 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:51:51,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 20:51:51,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2022-04-06 20:51:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 71 states have (on average 1.056338028169014) internal successors, (75), 72 states have internal predecessors, (75), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:51,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-04-06 20:51:51,519 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 73 [2022-04-06 20:51:51,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:51,519 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-04-06 20:51:51,519 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.1754385964912282) internal successors, (67), 56 states have internal predecessors, (67), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:51,519 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-04-06 20:51:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:51:51,520 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:51,520 INFO L499 BasicCegarLoop]: trace histogram [54, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:51,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-04-06 20:51:51,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:51,720 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:51,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1087914974, now seen corresponding path program 97 times [2022-04-06 20:51:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:51,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350872693] [2022-04-06 20:51:51,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:51,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:51,747 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1087914974, now seen corresponding path program 98 times [2022-04-06 20:51:51,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280458923] [2022-04-06 20:51:51,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:51,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:53,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-04-06 20:51:53,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 3 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:53,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280458923] [2022-04-06 20:51:53,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280458923] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:53,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109279644] [2022-04-06 20:51:53,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:53,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:53,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:53,100 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) [2022-04-06 20:51:53,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:51:53,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:53,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:53,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 2 proven. 108 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-04-06 20:51:53,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:53,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 108 proven. 2 refuted. 0 times theorem prover too weak. 1378 trivial. 0 not checked. [2022-04-06 20:51:53,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109279644] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:53,727 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:53,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 6, 6] total 66 [2022-04-06 20:51:53,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:53,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350872693] [2022-04-06 20:51:53,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350872693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:53,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:53,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:51:53,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50586621] [2022-04-06 20:51:53,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:53,728 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:51:53,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:53,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:51:53,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=4083, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:51:53,729 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 57 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:56,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:56,308 INFO L93 Difference]: Finished difference Result 155 states and 162 transitions. [2022-04-06 20:51:56,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:51:56,308 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 57 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 74 [2022-04-06 20:51:56,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:56,309 INFO L225 Difference]: With dead ends: 155 [2022-04-06 20:51:56,309 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:51:56,310 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1625 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=535, Invalid=13985, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:51:56,310 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 3667 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 3782 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:56,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 3782 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3667 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:51:56,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:51:56,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-04-06 20:51:56,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 73 states have internal predecessors, (76), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:51:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2022-04-06 20:51:56,321 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2022-04-06 20:51:56,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:56,321 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2022-04-06 20:51:56,321 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 57 states have internal predecessors, (68), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:51:56,321 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2022-04-06 20:51:56,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 20:51:56,321 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:56,322 INFO L499 BasicCegarLoop]: trace histogram [55, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:56,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:51:56,527 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:56,527 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:56,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:56,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1586656770, now seen corresponding path program 99 times [2022-04-06 20:51:56,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:56,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1041144801] [2022-04-06 20:51:56,536 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:56,559 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:56,559 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1586656770, now seen corresponding path program 100 times [2022-04-06 20:51:56,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389113707] [2022-04-06 20:51:56,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:56,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:57,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:57,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:57,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-04-06 20:51:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 3 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:57,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:57,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389113707] [2022-04-06 20:51:57,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389113707] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:57,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872264994] [2022-04-06 20:51:57,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:57,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:57,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:57,901 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) [2022-04-06 20:51:57,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:51:57,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:57,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:57,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:51:57,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:58,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 2 proven. 110 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-04-06 20:51:58,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1543 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2022-04-06 20:51:58,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872264994] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:58,570 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:58,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 6, 6] total 67 [2022-04-06 20:51:58,570 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:58,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1041144801] [2022-04-06 20:51:58,570 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1041144801] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:58,570 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:58,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:51:58,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464512590] [2022-04-06 20:51:58,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:58,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:51:58,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:51:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=4212, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:51:58,571 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 58 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:01,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:01,182 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2022-04-06 20:52:01,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:52:01,182 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 58 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 75 [2022-04-06 20:52:01,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:01,183 INFO L225 Difference]: With dead ends: 157 [2022-04-06 20:52:01,183 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:52:01,184 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1682 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=544, Invalid=14462, Unknown=0, NotChecked=0, Total=15006 [2022-04-06 20:52:01,184 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3539 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:01,185 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 138 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3539 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:52:01,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:52:01,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 20:52:01,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 74 states have internal predecessors, (77), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:01,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2022-04-06 20:52:01,196 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 75 [2022-04-06 20:52:01,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:01,196 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2022-04-06 20:52:01,196 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1694915254237288) internal successors, (69), 58 states have internal predecessors, (69), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:01,196 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2022-04-06 20:52:01,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 20:52:01,197 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:01,197 INFO L499 BasicCegarLoop]: trace histogram [56, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:01,220 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:01,419 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:52:01,419 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:01,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:01,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1400965086, now seen corresponding path program 101 times [2022-04-06 20:52:01,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:01,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [856533294] [2022-04-06 20:52:01,428 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:01,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:01,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:01,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1400965086, now seen corresponding path program 102 times [2022-04-06 20:52:01,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:01,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679791474] [2022-04-06 20:52:01,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:01,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:01,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-04-06 20:52:02,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 3 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:02,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:02,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679791474] [2022-04-06 20:52:02,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679791474] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:02,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529822314] [2022-04-06 20:52:02,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:02,897 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:02,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:02,899 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) [2022-04-06 20:52:02,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:52:02,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:52:02,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:02,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:02,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-04-06 20:52:03,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1599 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-04-06 20:52:03,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529822314] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:03,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:03,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 6, 6] total 68 [2022-04-06 20:52:03,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:03,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [856533294] [2022-04-06 20:52:03,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [856533294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:03,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:03,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:52:03,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611195002] [2022-04-06 20:52:03,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:03,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:52:03,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:03,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:52:03,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4363, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:52:03,500 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand has 60 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:06,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:06,097 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2022-04-06 20:52:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:52:06,097 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 76 [2022-04-06 20:52:06,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:06,098 INFO L225 Difference]: With dead ends: 159 [2022-04-06 20:52:06,098 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 20:52:06,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1611 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=533, Invalid=14967, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:52:06,099 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3337 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 3337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:06,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 3337 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:52:06,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 20:52:06,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2022-04-06 20:52:06,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 74 states have (on average 1.054054054054054) internal successors, (78), 75 states have internal predecessors, (78), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:06,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-04-06 20:52:06,111 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2022-04-06 20:52:06,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:06,111 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-04-06 20:52:06,112 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1666666666666667) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:06,112 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-04-06 20:52:06,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:52:06,112 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:06,112 INFO L499 BasicCegarLoop]: trace histogram [57, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:06,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:06,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:06,335 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:06,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:06,335 INFO L85 PathProgramCache]: Analyzing trace with hash 472037890, now seen corresponding path program 103 times [2022-04-06 20:52:06,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:06,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [362872166] [2022-04-06 20:52:06,344 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:06,368 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:06,368 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:06,368 INFO L85 PathProgramCache]: Analyzing trace with hash 472037890, now seen corresponding path program 104 times [2022-04-06 20:52:06,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:06,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119250657] [2022-04-06 20:52:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:06,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:07,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:07,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:07,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-04-06 20:52:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:07,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 3 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:07,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:07,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119250657] [2022-04-06 20:52:07,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119250657] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:07,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787847731] [2022-04-06 20:52:07,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:07,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:07,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:07,827 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) [2022-04-06 20:52:07,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:52:07,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:07,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:07,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:07,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 2 proven. 114 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2022-04-06 20:52:08,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:08,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 114 proven. 2 refuted. 0 times theorem prover too weak. 1540 trivial. 0 not checked. [2022-04-06 20:52:08,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787847731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:08,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:08,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 6, 6] total 69 [2022-04-06 20:52:08,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:08,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [362872166] [2022-04-06 20:52:08,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [362872166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:08,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:08,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:52:08,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096760928] [2022-04-06 20:52:08,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:08,501 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:52:08,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:52:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=4476, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:52:08,501 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:11,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:11,395 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2022-04-06 20:52:11,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:52:11,396 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 77 [2022-04-06 20:52:11,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:11,396 INFO L225 Difference]: With dead ends: 161 [2022-04-06 20:52:11,396 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 20:52:11,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1799 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=562, Invalid=15440, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:52:11,397 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 4129 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 4250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 4129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:11,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 258 Invalid, 4250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 4129 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:52:11,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 20:52:11,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-04-06 20:52:11,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 76 states have internal predecessors, (79), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:11,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 87 transitions. [2022-04-06 20:52:11,409 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 87 transitions. Word has length 77 [2022-04-06 20:52:11,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:11,409 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 87 transitions. [2022-04-06 20:52:11,409 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 60 states have internal predecessors, (71), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:11,409 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 87 transitions. [2022-04-06 20:52:11,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 20:52:11,410 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:11,410 INFO L499 BasicCegarLoop]: trace histogram [58, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:11,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:11,632 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,SelfDestructingSolverStorable61 [2022-04-06 20:52:11,632 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:11,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:11,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1594411998, now seen corresponding path program 105 times [2022-04-06 20:52:11,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:11,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1333273350] [2022-04-06 20:52:11,641 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:11,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:11,659 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:11,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1594411998, now seen corresponding path program 106 times [2022-04-06 20:52:11,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:11,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083111991] [2022-04-06 20:52:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:11,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:13,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:13,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-04-06 20:52:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 3 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:13,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:13,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083111991] [2022-04-06 20:52:13,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083111991] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:13,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946287437] [2022-04-06 20:52:13,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:13,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:13,158 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:13,159 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) [2022-04-06 20:52:13,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:52:13,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:13,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:13,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:13,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 2 proven. 116 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-04-06 20:52:13,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1714 backedges. 116 proven. 2 refuted. 0 times theorem prover too weak. 1596 trivial. 0 not checked. [2022-04-06 20:52:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946287437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:13,828 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:13,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 6, 6] total 70 [2022-04-06 20:52:13,828 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:13,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1333273350] [2022-04-06 20:52:13,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1333273350] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:13,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:13,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:52:13,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349466552] [2022-04-06 20:52:13,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:13,829 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:52:13,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:13,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:52:13,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=4611, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:52:13,829 INFO L87 Difference]: Start difference. First operand 84 states and 87 transitions. Second operand has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:16,612 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2022-04-06 20:52:16,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:52:16,612 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 78 [2022-04-06 20:52:16,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:16,613 INFO L225 Difference]: With dead ends: 163 [2022-04-06 20:52:16,613 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:52:16,614 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=571, Invalid=15941, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:52:16,614 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 3890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:16,615 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 98 Invalid, 3890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3766 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:52:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:52:16,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 20:52:16,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 77 states have internal predecessors, (80), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:16,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-04-06 20:52:16,622 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2022-04-06 20:52:16,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:16,622 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-04-06 20:52:16,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:16,623 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-04-06 20:52:16,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:52:16,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:16,623 INFO L499 BasicCegarLoop]: trace histogram [59, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:16,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 20:52:16,823 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,SelfDestructingSolverStorable62 [2022-04-06 20:52:16,823 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1229849086, now seen corresponding path program 107 times [2022-04-06 20:52:16,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:16,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1117647277] [2022-04-06 20:52:16,832 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:16,849 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:16,849 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:16,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1229849086, now seen corresponding path program 108 times [2022-04-06 20:52:16,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:16,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675086993] [2022-04-06 20:52:16,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:16,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:18,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:18,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:18,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-04-06 20:52:18,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 3 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:18,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:18,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675086993] [2022-04-06 20:52:18,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675086993] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:18,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135326876] [2022-04-06 20:52:18,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:18,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:18,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:18,481 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) [2022-04-06 20:52:18,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:52:18,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:52:18,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:18,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:52:18,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:18,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-06 20:52:18,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1773 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-06 20:52:18,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135326876] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:18,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:18,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 4, 4] total 67 [2022-04-06 20:52:18,923 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:18,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1117647277] [2022-04-06 20:52:18,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1117647277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:18,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:18,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:52:18,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359557627] [2022-04-06 20:52:18,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:18,924 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:52:18,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:18,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:52:18,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:52:18,925 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 63 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 62 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:21,830 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2022-04-06 20:52:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:52:21,831 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 62 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 79 [2022-04-06 20:52:21,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:21,831 INFO L225 Difference]: With dead ends: 165 [2022-04-06 20:52:21,831 INFO L226 Difference]: Without dead ends: 87 [2022-04-06 20:52:21,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1775 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=552, Invalid=15450, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 20:52:21,833 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4066 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 4192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 4066 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:21,835 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 158 Invalid, 4192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 4066 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:52:21,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-04-06 20:52:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 86. [2022-04-06 20:52:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 77 states have (on average 1.051948051948052) internal successors, (81), 78 states have internal predecessors, (81), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 89 transitions. [2022-04-06 20:52:21,845 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 89 transitions. Word has length 79 [2022-04-06 20:52:21,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:21,845 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 89 transitions. [2022-04-06 20:52:21,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 62 states have internal predecessors, (73), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:21,845 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 89 transitions. [2022-04-06 20:52:21,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 20:52:21,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:21,846 INFO L499 BasicCegarLoop]: trace histogram [60, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:21,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:22,046 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:22,046 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:22,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:22,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1481666594, now seen corresponding path program 109 times [2022-04-06 20:52:22,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:22,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1580028562] [2022-04-06 20:52:22,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:22,071 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:22,071 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:22,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1481666594, now seen corresponding path program 110 times [2022-04-06 20:52:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:22,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104881045] [2022-04-06 20:52:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:23,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:23,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-04-06 20:52:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 3 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104881045] [2022-04-06 20:52:23,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104881045] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:23,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173356359] [2022-04-06 20:52:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:23,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:23,687 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) [2022-04-06 20:52:23,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:52:23,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:23,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:23,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:23,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 2 proven. 120 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-04-06 20:52:24,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1833 backedges. 120 proven. 2 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2022-04-06 20:52:24,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173356359] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:24,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:24,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 6, 6] total 72 [2022-04-06 20:52:24,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:24,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1580028562] [2022-04-06 20:52:24,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1580028562] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:24,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:24,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:52:24,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121318834] [2022-04-06 20:52:24,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:24,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:52:24,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:24,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:52:24,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4887, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 20:52:24,372 INFO L87 Difference]: Start difference. First operand 86 states and 89 transitions. Second operand has 64 states, 64 states have (on average 1.15625) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:27,311 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2022-04-06 20:52:27,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:52:27,311 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 80 [2022-04-06 20:52:27,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:27,312 INFO L225 Difference]: With dead ends: 167 [2022-04-06 20:52:27,312 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:52:27,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1982 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=589, Invalid=16967, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:52:27,313 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3843 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:27,313 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 43 Invalid, 3971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3843 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:52:27,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:52:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-06 20:52:27,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 79 states have internal predecessors, (82), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2022-04-06 20:52:27,321 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2022-04-06 20:52:27,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:27,321 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2022-04-06 20:52:27,322 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.15625) internal successors, (74), 63 states have internal predecessors, (74), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2022-04-06 20:52:27,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 20:52:27,322 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:27,322 INFO L499 BasicCegarLoop]: trace histogram [61, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:27,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:52:27,523 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:27,523 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:27,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:27,523 INFO L85 PathProgramCache]: Analyzing trace with hash -360693246, now seen corresponding path program 111 times [2022-04-06 20:52:27,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:27,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [881687492] [2022-04-06 20:52:27,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:27,555 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:27,555 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:27,555 INFO L85 PathProgramCache]: Analyzing trace with hash -360693246, now seen corresponding path program 112 times [2022-04-06 20:52:27,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:27,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669243786] [2022-04-06 20:52:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:27,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:27,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:29,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:29,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-04-06 20:52:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:29,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 3 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:29,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669243786] [2022-04-06 20:52:29,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669243786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:29,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365821932] [2022-04-06 20:52:29,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:29,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:29,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:29,205 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) [2022-04-06 20:52:29,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:52:29,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:29,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:29,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:29,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 2 proven. 122 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-06 20:52:29,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1894 backedges. 122 proven. 2 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2022-04-06 20:52:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365821932] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:29,901 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 6, 6] total 73 [2022-04-06 20:52:29,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:29,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [881687492] [2022-04-06 20:52:29,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [881687492] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:29,901 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:29,901 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:52:29,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517469304] [2022-04-06 20:52:29,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:29,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:52:29,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:29,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:52:29,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=5028, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:52:29,903 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 64 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:33,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:33,130 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2022-04-06 20:52:33,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:52:33,130 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 64 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 81 [2022-04-06 20:52:33,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:33,131 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:52:33,131 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 20:52:33,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2045 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=598, Invalid=17492, Unknown=0, NotChecked=0, Total=18090 [2022-04-06 20:52:33,133 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 4657 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 4787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:33,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 273 Invalid, 4787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4657 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:52:33,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 20:52:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 20:52:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 80 states have internal predecessors, (83), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:33,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-04-06 20:52:33,142 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 81 [2022-04-06 20:52:33,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:33,142 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-04-06 20:52:33,142 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.1538461538461537) internal successors, (75), 64 states have internal predecessors, (75), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:33,142 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-04-06 20:52:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 20:52:33,143 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:33,143 INFO L499 BasicCegarLoop]: trace histogram [62, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:33,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:33,343 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,SelfDestructingSolverStorable65 [2022-04-06 20:52:33,343 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:33,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1639273438, now seen corresponding path program 113 times [2022-04-06 20:52:33,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:33,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1433528952] [2022-04-06 20:52:33,352 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:33,373 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:33,373 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1639273438, now seen corresponding path program 114 times [2022-04-06 20:52:33,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:33,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059569047] [2022-04-06 20:52:33,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:33,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:33,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-04-06 20:52:35,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:35,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 3 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:35,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059569047] [2022-04-06 20:52:35,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059569047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:35,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271733010] [2022-04-06 20:52:35,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:35,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:35,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:35,060 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) [2022-04-06 20:52:35,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:52:35,101 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:52:35,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:35,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:52:35,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:35,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2022-04-06 20:52:35,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2022-04-06 20:52:35,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271733010] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:35,529 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:35,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 4, 4] total 70 [2022-04-06 20:52:35,529 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:35,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1433528952] [2022-04-06 20:52:35,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1433528952] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:35,529 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:35,529 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:52:35,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132065059] [2022-04-06 20:52:35,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:35,530 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:52:35,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:35,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:52:35,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:52:35,531 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 65 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:38,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:38,717 INFO L93 Difference]: Finished difference Result 171 states and 178 transitions. [2022-04-06 20:52:38,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:52:38,717 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 65 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 82 [2022-04-06 20:52:38,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:38,718 INFO L225 Difference]: With dead ends: 171 [2022-04-06 20:52:38,718 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 20:52:38,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=579, Invalid=16977, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:52:38,719 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 4544 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 4675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:38,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 193 Invalid, 4675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4544 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:52:38,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 20:52:38,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2022-04-06 20:52:38,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 80 states have (on average 1.05) internal successors, (84), 81 states have internal predecessors, (84), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:38,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2022-04-06 20:52:38,731 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2022-04-06 20:52:38,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:38,731 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2022-04-06 20:52:38,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 65 states have internal predecessors, (76), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:38,732 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2022-04-06 20:52:38,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:52:38,732 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:38,732 INFO L499 BasicCegarLoop]: trace histogram [63, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:38,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:52:38,932 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,SelfDestructingSolverStorable66 [2022-04-06 20:52:38,932 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:38,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:38,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1674413570, now seen corresponding path program 115 times [2022-04-06 20:52:38,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:38,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [971211205] [2022-04-06 20:52:38,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:38,956 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:38,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:38,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1674413570, now seen corresponding path program 116 times [2022-04-06 20:52:38,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:38,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093181173] [2022-04-06 20:52:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:38,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:40,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:40,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:40,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-04-06 20:52:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:40,685 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 3 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:40,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:40,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093181173] [2022-04-06 20:52:40,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093181173] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:40,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074524212] [2022-04-06 20:52:40,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:40,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:40,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:40,687 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) [2022-04-06 20:52:40,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:52:40,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:40,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:40,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:52:40,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:40,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2022-04-06 20:52:40,951 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2019 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2016 trivial. 0 not checked. [2022-04-06 20:52:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074524212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:41,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:41,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 4, 7] total 74 [2022-04-06 20:52:41,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:41,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [971211205] [2022-04-06 20:52:41,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [971211205] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:41,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:41,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:52:41,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080543722] [2022-04-06 20:52:41,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:41,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:52:41,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:41,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:52:41,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=5188, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:52:41,534 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 67 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 66 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:44,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:44,812 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2022-04-06 20:52:44,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:52:44,813 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 66 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 83 [2022-04-06 20:52:44,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:44,813 INFO L225 Difference]: With dead ends: 173 [2022-04-06 20:52:44,813 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 20:52:44,814 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2025 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=596, Invalid=18310, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:52:44,814 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4551 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 4685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 4551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:44,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 153 Invalid, 4685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 4551 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:52:44,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 20:52:44,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-04-06 20:52:44,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 82 states have internal predecessors, (85), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:44,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-04-06 20:52:44,823 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 83 [2022-04-06 20:52:44,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:44,823 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-04-06 20:52:44,823 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 66 states have internal predecessors, (77), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:44,823 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-04-06 20:52:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-04-06 20:52:44,823 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:44,823 INFO L499 BasicCegarLoop]: trace histogram [64, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:44,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:45,024 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:45,024 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:45,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1319495714, now seen corresponding path program 117 times [2022-04-06 20:52:45,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:45,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [748615327] [2022-04-06 20:52:45,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:45,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:45,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:45,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1319495714, now seen corresponding path program 118 times [2022-04-06 20:52:45,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:45,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246080753] [2022-04-06 20:52:45,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:45,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:45,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:46,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:46,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:46,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2022-04-06 20:52:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:46,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2083 backedges. 3 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:46,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246080753] [2022-04-06 20:52:46,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246080753] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:46,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284195641] [2022-04-06 20:52:46,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:52:46,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:46,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:46,831 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) [2022-04-06 20:52:46,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:52:46,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:52:46,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:46,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:47,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2083 backedges. 2 proven. 128 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2022-04-06 20:52:47,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:47,546 INFO L134 CoverageAnalysis]: Checked inductivity of 2083 backedges. 128 proven. 2 refuted. 0 times theorem prover too weak. 1953 trivial. 0 not checked. [2022-04-06 20:52:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284195641] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:47,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:47,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 6, 6] total 76 [2022-04-06 20:52:47,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:47,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [748615327] [2022-04-06 20:52:47,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [748615327] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:47,547 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:47,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:52:47,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137758020] [2022-04-06 20:52:47,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:47,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:52:47,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:47,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:52:47,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=5463, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:52:47,548 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 68 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:51,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:51,010 INFO L93 Difference]: Finished difference Result 175 states and 182 transitions. [2022-04-06 20:52:51,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:52:51,010 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 84 [2022-04-06 20:52:51,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:51,011 INFO L225 Difference]: With dead ends: 175 [2022-04-06 20:52:51,011 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:52:51,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2240 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=625, Invalid=19115, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:52:51,012 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 5012 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 5012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:51,012 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 263 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 5012 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:52:51,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:52:51,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 20:52:51,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.048780487804878) internal successors, (86), 83 states have internal predecessors, (86), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:51,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2022-04-06 20:52:51,025 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2022-04-06 20:52:51,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:51,025 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2022-04-06 20:52:51,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.1470588235294117) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:51,025 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2022-04-06 20:52:51,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:52:51,026 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:51,026 INFO L499 BasicCegarLoop]: trace histogram [65, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:51,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-04-06 20:52:51,247 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,SelfDestructingSolverStorable68 [2022-04-06 20:52:51,248 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:51,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:51,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1093023230, now seen corresponding path program 119 times [2022-04-06 20:52:51,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:51,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2131598202] [2022-04-06 20:52:51,256 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:51,280 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:51,280 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:51,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1093023230, now seen corresponding path program 120 times [2022-04-06 20:52:51,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:51,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148785424] [2022-04-06 20:52:51,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:51,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:53,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-04-06 20:52:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 3 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:53,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:53,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148785424] [2022-04-06 20:52:53,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148785424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:53,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040083451] [2022-04-06 20:52:53,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:52:53,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:53,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:53,101 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) [2022-04-06 20:52:53,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:52:53,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:52:53,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:53,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:53,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:53,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 20:52:53,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:52:53,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2148 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 20:52:53,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040083451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:52:53,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:52:53,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 6, 6] total 77 [2022-04-06 20:52:53,754 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:52:53,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2131598202] [2022-04-06 20:52:53,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2131598202] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:52:53,754 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:52:53,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:52:53,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436318059] [2022-04-06 20:52:53,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:52:53,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:52:53,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:52:53,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5632, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:52:53,755 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 68 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:57,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:52:57,373 INFO L93 Difference]: Finished difference Result 177 states and 184 transitions. [2022-04-06 20:52:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:52:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 68 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 85 [2022-04-06 20:52:57,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:52:57,374 INFO L225 Difference]: With dead ends: 177 [2022-04-06 20:52:57,374 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 20:52:57,375 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2160 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=614, Invalid=19692, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:52:57,375 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 5174 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 5174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:52:57,375 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 273 Invalid, 5311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 5174 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:52:57,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 20:52:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2022-04-06 20:52:57,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 84 states have internal predecessors, (87), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:52:57,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2022-04-06 20:52:57,384 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 85 [2022-04-06 20:52:57,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:52:57,384 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2022-04-06 20:52:57,385 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.144927536231884) internal successors, (79), 68 states have internal predecessors, (79), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:52:57,385 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2022-04-06 20:52:57,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 20:52:57,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:52:57,385 INFO L499 BasicCegarLoop]: trace histogram [66, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:52:57,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-04-06 20:52:57,592 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,SelfDestructingSolverStorable69 [2022-04-06 20:52:57,592 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:52:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:52:57,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1428300834, now seen corresponding path program 121 times [2022-04-06 20:52:57,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:52:57,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1641198669] [2022-04-06 20:52:57,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:57,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:52:57,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:52:57,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1428300834, now seen corresponding path program 122 times [2022-04-06 20:52:57,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:52:57,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707717399] [2022-04-06 20:52:57,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:52:57,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:52:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:52:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2022-04-06 20:52:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:52:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 3 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:52:59,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:52:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707717399] [2022-04-06 20:52:59,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707717399] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:52:59,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861092079] [2022-04-06 20:52:59,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:52:59,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:52:59,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:52:59,500 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) [2022-04-06 20:52:59,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:52:59,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:52:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:52:59,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:52:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:52:59,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 2 proven. 132 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2022-04-06 20:52:59,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:00,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2214 backedges. 132 proven. 2 refuted. 0 times theorem prover too weak. 2080 trivial. 0 not checked. [2022-04-06 20:53:00,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861092079] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:00,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:00,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 6, 6] total 78 [2022-04-06 20:53:00,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:00,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1641198669] [2022-04-06 20:53:00,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1641198669] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:00,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:00,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:53:00,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782319083] [2022-04-06 20:53:00,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:00,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:53:00,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:00,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:53:00,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5763, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:53:00,228 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand has 70 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 69 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:03,992 INFO L93 Difference]: Finished difference Result 179 states and 186 transitions. [2022-04-06 20:53:03,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:53:03,992 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 69 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 86 [2022-04-06 20:53:03,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:03,993 INFO L225 Difference]: With dead ends: 179 [2022-04-06 20:53:03,993 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:53:03,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=643, Invalid=20237, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:53:03,994 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 5518 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 5657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 5518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:03,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 343 Invalid, 5657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 5518 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:53:03,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:53:04,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-04-06 20:53:04,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 85 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:04,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2022-04-06 20:53:04,002 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2022-04-06 20:53:04,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:04,002 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2022-04-06 20:53:04,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 69 states have internal predecessors, (80), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:04,002 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2022-04-06 20:53:04,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 20:53:04,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:04,003 INFO L499 BasicCegarLoop]: trace histogram [67, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:04,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:53:04,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:04,203 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:04,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:04,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2015031806, now seen corresponding path program 123 times [2022-04-06 20:53:04,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:04,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1415702453] [2022-04-06 20:53:04,212 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:04,227 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:04,227 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:04,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2015031806, now seen corresponding path program 124 times [2022-04-06 20:53:04,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:04,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32741878] [2022-04-06 20:53:04,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:04,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:06,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:06,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-04-06 20:53:06,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 3 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:06,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32741878] [2022-04-06 20:53:06,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32741878] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:06,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980452121] [2022-04-06 20:53:06,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:06,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:06,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:06,130 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) [2022-04-06 20:53:06,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:53:06,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:06,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:06,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:06,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:06,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 2 proven. 134 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 20:53:06,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2281 backedges. 134 proven. 2 refuted. 0 times theorem prover too weak. 2145 trivial. 0 not checked. [2022-04-06 20:53:06,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980452121] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:06,882 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:06,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 6, 6] total 79 [2022-04-06 20:53:06,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:06,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1415702453] [2022-04-06 20:53:06,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1415702453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:06,883 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:06,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:53:06,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923738452] [2022-04-06 20:53:06,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:06,883 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:53:06,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:06,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:53:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=5916, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:53:06,884 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:10,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:10,647 INFO L93 Difference]: Finished difference Result 181 states and 188 transitions. [2022-04-06 20:53:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:53:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 87 [2022-04-06 20:53:10,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:10,648 INFO L225 Difference]: With dead ends: 181 [2022-04-06 20:53:10,648 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 20:53:10,650 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=652, Invalid=20810, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:53:10,650 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 5444 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 5585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 5444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:10,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 273 Invalid, 5585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 5444 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:53:10,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 20:53:10,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-06 20:53:10,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 86 states have internal predecessors, (89), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:10,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 97 transitions. [2022-04-06 20:53:10,664 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 97 transitions. Word has length 87 [2022-04-06 20:53:10,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:10,664 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 97 transitions. [2022-04-06 20:53:10,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 70 states have internal predecessors, (81), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:10,664 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 97 transitions. [2022-04-06 20:53:10,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 20:53:10,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:10,665 INFO L499 BasicCegarLoop]: trace histogram [68, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:10,689 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:10,888 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,SelfDestructingSolverStorable71 [2022-04-06 20:53:10,888 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:10,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:10,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1384161246, now seen corresponding path program 125 times [2022-04-06 20:53:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:10,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [585269938] [2022-04-06 20:53:10,897 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:10,918 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:10,918 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1384161246, now seen corresponding path program 126 times [2022-04-06 20:53:10,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:10,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431578264] [2022-04-06 20:53:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:12,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:12,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:12,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-04-06 20:53:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 3 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:12,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431578264] [2022-04-06 20:53:12,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431578264] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:12,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745426511] [2022-04-06 20:53:12,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:12,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:12,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:12,911 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) [2022-04-06 20:53:12,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:53:12,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:53:12,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:12,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:12,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:13,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2022-04-06 20:53:13,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:13,611 INFO L134 CoverageAnalysis]: Checked inductivity of 2349 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2022-04-06 20:53:13,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745426511] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:13,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:13,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 6, 6] total 80 [2022-04-06 20:53:13,611 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:13,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [585269938] [2022-04-06 20:53:13,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [585269938] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:13,611 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:13,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:53:13,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973224913] [2022-04-06 20:53:13,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:13,612 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:53:13,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:13,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:53:13,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=6091, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:53:13,612 INFO L87 Difference]: Start difference. First operand 94 states and 97 transitions. Second operand has 72 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 71 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:17,287 INFO L93 Difference]: Finished difference Result 183 states and 190 transitions. [2022-04-06 20:53:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:53:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 71 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 88 [2022-04-06 20:53:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:17,288 INFO L225 Difference]: With dead ends: 183 [2022-04-06 20:53:17,288 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 20:53:17,290 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=641, Invalid=21411, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:53:17,291 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4906 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 4906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:17,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 5050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 4906 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:53:17,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 20:53:17,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2022-04-06 20:53:17,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 87 states have internal predecessors, (90), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:17,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-04-06 20:53:17,311 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2022-04-06 20:53:17,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:17,312 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-04-06 20:53:17,312 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 71 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:17,312 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-04-06 20:53:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:53:17,312 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:17,312 INFO L499 BasicCegarLoop]: trace histogram [69, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:17,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:17,517 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:17,517 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:17,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:17,517 INFO L85 PathProgramCache]: Analyzing trace with hash 992956930, now seen corresponding path program 127 times [2022-04-06 20:53:17,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:17,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551119841] [2022-04-06 20:53:17,526 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:17,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:17,552 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 992956930, now seen corresponding path program 128 times [2022-04-06 20:53:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:17,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346030258] [2022-04-06 20:53:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:19,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:19,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-04-06 20:53:19,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 3 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:19,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346030258] [2022-04-06 20:53:19,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346030258] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:19,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910916250] [2022-04-06 20:53:19,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:19,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:19,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:19,596 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) [2022-04-06 20:53:19,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:53:19,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:19,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:19,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:19,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:19,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 2 proven. 138 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-04-06 20:53:19,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 138 proven. 2 refuted. 0 times theorem prover too weak. 2278 trivial. 0 not checked. [2022-04-06 20:53:20,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910916250] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:20,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:20,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 6, 6] total 81 [2022-04-06 20:53:20,387 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:20,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551119841] [2022-04-06 20:53:20,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551119841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:20,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:20,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:53:20,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810404682] [2022-04-06 20:53:20,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:20,388 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:53:20,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:20,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:53:20,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=6228, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:53:20,389 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 73 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 72 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:24,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:24,262 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2022-04-06 20:53:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:53:24,262 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 72 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 89 [2022-04-06 20:53:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:24,263 INFO L225 Difference]: With dead ends: 185 [2022-04-06 20:53:24,263 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:53:24,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2585 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=670, Invalid=21980, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:53:24,264 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5241 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 5387 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 5241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:24,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 5387 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 5241 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:53:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:53:24,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-04-06 20:53:24,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 88 states have internal predecessors, (91), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:24,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 99 transitions. [2022-04-06 20:53:24,275 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 99 transitions. Word has length 89 [2022-04-06 20:53:24,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:24,276 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 99 transitions. [2022-04-06 20:53:24,276 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 72 states have internal predecessors, (83), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:24,276 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 99 transitions. [2022-04-06 20:53:24,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-04-06 20:53:24,276 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:24,276 INFO L499 BasicCegarLoop]: trace histogram [70, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:24,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:24,476 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:24,477 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:24,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:24,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1669176354, now seen corresponding path program 129 times [2022-04-06 20:53:24,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:24,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103449412] [2022-04-06 20:53:24,486 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:24,502 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:24,502 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:24,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1669176354, now seen corresponding path program 130 times [2022-04-06 20:53:24,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:24,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518318183] [2022-04-06 20:53:24,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:24,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:24,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:26,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:26,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-04-06 20:53:26,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:26,742 INFO L134 CoverageAnalysis]: Checked inductivity of 2488 backedges. 3 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:26,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:26,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518318183] [2022-04-06 20:53:26,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518318183] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:26,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288097807] [2022-04-06 20:53:26,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:26,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:26,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:26,743 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) [2022-04-06 20:53:26,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:53:26,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:26,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:26,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:26,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:27,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2488 backedges. 2 proven. 140 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2022-04-06 20:53:27,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:27,543 INFO L134 CoverageAnalysis]: Checked inductivity of 2488 backedges. 140 proven. 2 refuted. 0 times theorem prover too weak. 2346 trivial. 0 not checked. [2022-04-06 20:53:27,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288097807] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:27,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:27,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 6, 6] total 82 [2022-04-06 20:53:27,544 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:27,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103449412] [2022-04-06 20:53:27,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103449412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:27,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:27,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:53:27,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245514124] [2022-04-06 20:53:27,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:27,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:53:27,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:27,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:53:27,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=6387, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:53:27,545 INFO L87 Difference]: Start difference. First operand 96 states and 99 transitions. Second operand has 74 states, 74 states have (on average 1.135135135135135) internal successors, (84), 73 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:31,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:31,626 INFO L93 Difference]: Finished difference Result 187 states and 194 transitions. [2022-04-06 20:53:31,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:53:31,626 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.135135135135135) internal successors, (84), 73 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 90 [2022-04-06 20:53:31,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:31,627 INFO L225 Difference]: With dead ends: 187 [2022-04-06 20:53:31,627 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:53:31,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2657 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=679, Invalid=22577, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:53:31,629 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 5743 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 5891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 5743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:31,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 233 Invalid, 5891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 5743 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:53:31,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:53:31,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 20:53:31,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 89 states have internal predecessors, (92), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:31,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-04-06 20:53:31,642 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2022-04-06 20:53:31,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:31,642 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-04-06 20:53:31,642 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.135135135135135) internal successors, (84), 73 states have internal predecessors, (84), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:31,642 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-04-06 20:53:31,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:53:31,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:31,643 INFO L499 BasicCegarLoop]: trace histogram [71, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:31,664 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:53:31,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:31,856 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:31,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:31,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1157142018, now seen corresponding path program 131 times [2022-04-06 20:53:31,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:31,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853462091] [2022-04-06 20:53:31,865 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:31,883 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:31,883 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:31,883 INFO L85 PathProgramCache]: Analyzing trace with hash 1157142018, now seen corresponding path program 132 times [2022-04-06 20:53:31,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:31,883 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867971238] [2022-04-06 20:53:31,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:31,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:34,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:34,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:34,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-04-06 20:53:34,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:34,028 INFO L134 CoverageAnalysis]: Checked inductivity of 2559 backedges. 3 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:34,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:34,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867971238] [2022-04-06 20:53:34,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867971238] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:34,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973997123] [2022-04-06 20:53:34,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:34,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:34,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:34,032 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) [2022-04-06 20:53:34,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:53:34,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:53:34,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:34,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:53:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:34,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2559 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-04-06 20:53:34,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:34,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2559 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-04-06 20:53:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973997123] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:34,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:34,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 4, 4] total 79 [2022-04-06 20:53:34,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:34,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853462091] [2022-04-06 20:53:34,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853462091] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:34,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:34,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:53:34,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113055794] [2022-04-06 20:53:34,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:34,596 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:53:34,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:34,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:53:34,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:53:34,597 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 75 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 74 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:38,522 INFO L93 Difference]: Finished difference Result 189 states and 196 transitions. [2022-04-06 20:53:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:53:38,522 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 74 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 91 [2022-04-06 20:53:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:38,523 INFO L225 Difference]: With dead ends: 189 [2022-04-06 20:53:38,523 INFO L226 Difference]: Without dead ends: 99 [2022-04-06 20:53:38,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2561 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=660, Invalid=21990, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:53:38,525 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5347 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 5347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:38,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 53 Invalid, 5497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 5347 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:53:38,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-04-06 20:53:38,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2022-04-06 20:53:38,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 90 states have internal predecessors, (93), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:38,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 101 transitions. [2022-04-06 20:53:38,534 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 101 transitions. Word has length 91 [2022-04-06 20:53:38,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:38,534 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 101 transitions. [2022-04-06 20:53:38,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 74 states have internal predecessors, (85), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 101 transitions. [2022-04-06 20:53:38,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 20:53:38,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:38,535 INFO L499 BasicCegarLoop]: trace histogram [72, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:38,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:38,751 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,SelfDestructingSolverStorable75 [2022-04-06 20:53:38,751 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:38,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:38,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1831020510, now seen corresponding path program 133 times [2022-04-06 20:53:38,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:38,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [416630045] [2022-04-06 20:53:38,760 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:38,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:38,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:38,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1831020510, now seen corresponding path program 134 times [2022-04-06 20:53:38,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:38,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626237343] [2022-04-06 20:53:38,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:38,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:38,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:41,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:41,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:41,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2022-04-06 20:53:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:41,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2631 backedges. 3 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:41,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626237343] [2022-04-06 20:53:41,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626237343] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:41,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595958164] [2022-04-06 20:53:41,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:53:41,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:41,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:41,043 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) [2022-04-06 20:53:41,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:53:41,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:53:41,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:41,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:41,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2631 backedges. 2 proven. 144 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2022-04-06 20:53:41,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2631 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 2485 trivial. 0 not checked. [2022-04-06 20:53:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595958164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:41,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:41,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 6, 6] total 84 [2022-04-06 20:53:41,868 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:41,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [416630045] [2022-04-06 20:53:41,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [416630045] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:41,868 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:41,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:53:41,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112828788] [2022-04-06 20:53:41,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:41,869 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:53:41,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:41,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:53:41,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=6711, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:53:41,870 INFO L87 Difference]: Start difference. First operand 98 states and 101 transitions. Second operand has 76 states, 76 states have (on average 1.131578947368421) internal successors, (86), 75 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:46,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:46,195 INFO L93 Difference]: Finished difference Result 191 states and 198 transitions. [2022-04-06 20:53:46,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:53:46,195 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.131578947368421) internal successors, (86), 75 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 92 [2022-04-06 20:53:46,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:46,196 INFO L225 Difference]: With dead ends: 191 [2022-04-06 20:53:46,196 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:53:46,197 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=697, Invalid=23795, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:53:46,198 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 6334 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 6485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 6334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:46,198 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 333 Invalid, 6485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 6334 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:53:46,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:53:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-04-06 20:53:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 91 states have internal predecessors, (94), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2022-04-06 20:53:46,207 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2022-04-06 20:53:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:46,208 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2022-04-06 20:53:46,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.131578947368421) internal successors, (86), 75 states have internal predecessors, (86), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2022-04-06 20:53:46,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 20:53:46,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:46,208 INFO L499 BasicCegarLoop]: trace histogram [73, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:46,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:53:46,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:46,409 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:46,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:46,409 INFO L85 PathProgramCache]: Analyzing trace with hash 25221634, now seen corresponding path program 135 times [2022-04-06 20:53:46,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:46,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [281795888] [2022-04-06 20:53:46,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:46,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:46,451 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash 25221634, now seen corresponding path program 136 times [2022-04-06 20:53:46,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:46,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809967435] [2022-04-06 20:53:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:46,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:48,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:48,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-04-06 20:53:48,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 3 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:48,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809967435] [2022-04-06 20:53:48,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809967435] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:48,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139095180] [2022-04-06 20:53:48,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:53:48,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:48,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:48,681 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) [2022-04-06 20:53:48,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:53:48,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:53:48,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:48,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:48,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:49,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 2 proven. 146 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-04-06 20:53:49,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 146 proven. 2 refuted. 0 times theorem prover too weak. 2556 trivial. 0 not checked. [2022-04-06 20:53:49,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139095180] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:49,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:49,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 6, 6] total 85 [2022-04-06 20:53:49,499 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [281795888] [2022-04-06 20:53:49,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [281795888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:49,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:49,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:53:49,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40963551] [2022-04-06 20:53:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:49,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:53:49,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:53:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=6876, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:53:49,500 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:53:53,702 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2022-04-06 20:53:53,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:53:53,702 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 93 [2022-04-06 20:53:53,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:53:53,703 INFO L225 Difference]: With dead ends: 193 [2022-04-06 20:53:53,703 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:53:53,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2879 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=706, Invalid=24416, Unknown=0, NotChecked=0, Total=25122 [2022-04-06 20:53:53,705 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 5672 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 5672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:53:53,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 63 Invalid, 5825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 5672 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:53:53,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:53:53,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-04-06 20:53:53,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 91 states have (on average 1.043956043956044) internal successors, (95), 92 states have internal predecessors, (95), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:53:53,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-04-06 20:53:53,713 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 93 [2022-04-06 20:53:53,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:53:53,713 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-04-06 20:53:53,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.12987012987013) internal successors, (87), 76 states have internal predecessors, (87), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:53:53,714 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-04-06 20:53:53,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 20:53:53,714 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:53:53,714 INFO L499 BasicCegarLoop]: trace histogram [74, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:53:53,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-04-06 20:53:53,914 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:53,914 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:53:53,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:53:53,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1734153250, now seen corresponding path program 137 times [2022-04-06 20:53:53,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:53,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1965623248] [2022-04-06 20:53:53,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:53,955 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:53:53,955 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:53:53,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1734153250, now seen corresponding path program 138 times [2022-04-06 20:53:53,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:53:53,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331909816] [2022-04-06 20:53:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:53:53,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:53:53,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:56,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:53:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:56,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2022-04-06 20:53:56,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:53:56,228 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 3 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:53:56,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:53:56,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331909816] [2022-04-06 20:53:56,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331909816] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:53:56,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894770734] [2022-04-06 20:53:56,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:53:56,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:53:56,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:53:56,229 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) [2022-04-06 20:53:56,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:53:56,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:53:56,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:53:56,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:53:56,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:53:56,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2022-04-06 20:53:56,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:53:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2778 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2022-04-06 20:53:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894770734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:53:56,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:53:56,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 6, 6] total 86 [2022-04-06 20:53:56,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:53:56,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1965623248] [2022-04-06 20:53:56,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1965623248] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:53:56,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:53:56,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:53:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437258341] [2022-04-06 20:53:56,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:53:56,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:53:56,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:53:56,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:53:56,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=7063, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:53:56,977 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 78 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:01,486 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2022-04-06 20:54:01,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:54:01,486 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 94 [2022-04-06 20:54:01,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:01,487 INFO L225 Difference]: With dead ends: 195 [2022-04-06 20:54:01,487 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 20:54:01,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2790 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=695, Invalid=25065, Unknown=0, NotChecked=0, Total=25760 [2022-04-06 20:54:01,488 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 6361 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 6517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 6361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:01,488 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 243 Invalid, 6517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 6361 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:54:01,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 20:54:01,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2022-04-06 20:54:01,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 93 states have internal predecessors, (96), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:01,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2022-04-06 20:54:01,499 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2022-04-06 20:54:01,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:01,499 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2022-04-06 20:54:01,499 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 77 states have internal predecessors, (88), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:01,500 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2022-04-06 20:54:01,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:54:01,500 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:01,500 INFO L499 BasicCegarLoop]: trace histogram [75, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:01,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:54:01,719 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,SelfDestructingSolverStorable78 [2022-04-06 20:54:01,719 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:01,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1123541502, now seen corresponding path program 139 times [2022-04-06 20:54:01,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:01,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1664318528] [2022-04-06 20:54:01,729 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:01,746 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:01,747 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:01,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1123541502, now seen corresponding path program 140 times [2022-04-06 20:54:01,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:01,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702147932] [2022-04-06 20:54:01,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:01,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:01,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-04-06 20:54:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:04,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 3 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:04,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702147932] [2022-04-06 20:54:04,102 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702147932] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:04,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606399518] [2022-04-06 20:54:04,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:04,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:04,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:04,103 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) [2022-04-06 20:54:04,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:54:04,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:04,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:04,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:54:04,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:04,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 2 proven. 150 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2022-04-06 20:54:04,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:04,953 INFO L134 CoverageAnalysis]: Checked inductivity of 2853 backedges. 150 proven. 2 refuted. 0 times theorem prover too weak. 2701 trivial. 0 not checked. [2022-04-06 20:54:04,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606399518] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:04,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:04,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 6, 6] total 87 [2022-04-06 20:54:04,954 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:04,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1664318528] [2022-04-06 20:54:04,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1664318528] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:04,954 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:04,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:54:04,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589760956] [2022-04-06 20:54:04,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:04,954 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:54:04,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:54:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=7212, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:54:04,955 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand has 79 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:09,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:09,363 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2022-04-06 20:54:09,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:54:09,368 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 95 [2022-04-06 20:54:09,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:09,368 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:54:09,368 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 20:54:09,370 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3032 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=724, Invalid=25682, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:54:09,370 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5958 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 6116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 5958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:09,370 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 58 Invalid, 6116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 5958 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:54:09,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 20:54:09,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-04-06 20:54:09,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 93 states have (on average 1.043010752688172) internal successors, (97), 94 states have internal predecessors, (97), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:09,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2022-04-06 20:54:09,384 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 95 [2022-04-06 20:54:09,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:09,384 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2022-04-06 20:54:09,384 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 78 states have internal predecessors, (89), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:09,384 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2022-04-06 20:54:09,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 20:54:09,385 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:09,385 INFO L499 BasicCegarLoop]: trace histogram [76, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:09,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:54:09,606 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,SelfDestructingSolverStorable79 [2022-04-06 20:54:09,606 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:09,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:09,606 INFO L85 PathProgramCache]: Analyzing trace with hash 482234402, now seen corresponding path program 141 times [2022-04-06 20:54:09,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:09,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178238443] [2022-04-06 20:54:09,615 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:09,641 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:09,641 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:09,642 INFO L85 PathProgramCache]: Analyzing trace with hash 482234402, now seen corresponding path program 142 times [2022-04-06 20:54:09,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:09,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594116067] [2022-04-06 20:54:09,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:09,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:09,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:12,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:12,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:12,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2022-04-06 20:54:12,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:12,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 3 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:12,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:12,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594116067] [2022-04-06 20:54:12,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594116067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:12,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839306493] [2022-04-06 20:54:12,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:12,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:12,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:12,019 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) [2022-04-06 20:54:12,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:54:12,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:12,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:12,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:54:12,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:12,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 2 proven. 152 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2022-04-06 20:54:12,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:12,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2929 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 2775 trivial. 0 not checked. [2022-04-06 20:54:12,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839306493] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:12,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:12,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 6, 6] total 88 [2022-04-06 20:54:12,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:12,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178238443] [2022-04-06 20:54:12,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178238443] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:12,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:12,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:54:12,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133995399] [2022-04-06 20:54:12,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:12,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:54:12,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:12,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:54:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=7383, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:54:12,863 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand has 80 states, 80 states have (on average 1.125) internal successors, (90), 79 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:17,479 INFO L93 Difference]: Finished difference Result 199 states and 206 transitions. [2022-04-06 20:54:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:54:17,479 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.125) internal successors, (90), 79 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 96 [2022-04-06 20:54:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:17,480 INFO L225 Difference]: With dead ends: 199 [2022-04-06 20:54:17,480 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:54:17,482 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3110 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=733, Invalid=26327, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:54:17,482 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 6427 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 6587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 6427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:17,482 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 6587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 6427 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:54:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:54:17,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-04-06 20:54:17,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 95 states have internal predecessors, (98), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:17,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2022-04-06 20:54:17,496 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2022-04-06 20:54:17,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:17,496 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2022-04-06 20:54:17,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.125) internal successors, (90), 79 states have internal predecessors, (90), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:17,497 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2022-04-06 20:54:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:54:17,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:17,497 INFO L499 BasicCegarLoop]: trace histogram [77, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:17,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-04-06 20:54:17,711 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:17,711 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:17,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:17,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1278320126, now seen corresponding path program 143 times [2022-04-06 20:54:17,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:17,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1126522748] [2022-04-06 20:54:17,721 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:17,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:17,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1278320126, now seen corresponding path program 144 times [2022-04-06 20:54:17,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:17,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910604869] [2022-04-06 20:54:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:17,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:20,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:20,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:20,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-04-06 20:54:20,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 3 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:20,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:20,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910604869] [2022-04-06 20:54:20,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910604869] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:20,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32483409] [2022-04-06 20:54:20,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:20,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:20,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:20,206 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) [2022-04-06 20:54:20,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:54:20,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:54:20,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:20,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:54:20,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:20,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2022-04-06 20:54:20,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:20,765 INFO L134 CoverageAnalysis]: Checked inductivity of 3006 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2022-04-06 20:54:20,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32483409] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:20,765 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:20,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 4, 4] total 85 [2022-04-06 20:54:20,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:20,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1126522748] [2022-04-06 20:54:20,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1126522748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:20,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:20,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:54:20,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877790290] [2022-04-06 20:54:20,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:20,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:54:20,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:54:20,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:54:20,766 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand has 81 states, 81 states have (on average 1.123456790123457) internal successors, (91), 80 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:25,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:25,447 INFO L93 Difference]: Finished difference Result 201 states and 208 transitions. [2022-04-06 20:54:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:54:25,447 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.123456790123457) internal successors, (91), 80 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 97 [2022-04-06 20:54:25,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:25,448 INFO L225 Difference]: With dead ends: 201 [2022-04-06 20:54:25,448 INFO L226 Difference]: Without dead ends: 105 [2022-04-06 20:54:25,450 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3008 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=714, Invalid=25692, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 20:54:25,450 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 6688 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 6850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 6688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:25,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 198 Invalid, 6850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 6688 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:54:25,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-04-06 20:54:25,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2022-04-06 20:54:25,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 96 states have internal predecessors, (99), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:25,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 107 transitions. [2022-04-06 20:54:25,467 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 107 transitions. Word has length 97 [2022-04-06 20:54:25,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:25,468 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 107 transitions. [2022-04-06 20:54:25,468 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.123456790123457) internal successors, (91), 80 states have internal predecessors, (91), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:25,468 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 107 transitions. [2022-04-06 20:54:25,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 20:54:25,468 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:25,468 INFO L499 BasicCegarLoop]: trace histogram [78, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:25,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:25,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:25,680 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:25,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:25,681 INFO L85 PathProgramCache]: Analyzing trace with hash -20935646, now seen corresponding path program 145 times [2022-04-06 20:54:25,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:25,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [5268472] [2022-04-06 20:54:25,689 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:25,707 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:25,707 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:25,707 INFO L85 PathProgramCache]: Analyzing trace with hash -20935646, now seen corresponding path program 146 times [2022-04-06 20:54:25,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:25,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029694673] [2022-04-06 20:54:25,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:25,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:28,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:28,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:28,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-04-06 20:54:28,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:28,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3084 backedges. 3 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:28,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:28,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029694673] [2022-04-06 20:54:28,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029694673] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:28,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787845056] [2022-04-06 20:54:28,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:28,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:28,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:28,221 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) [2022-04-06 20:54:28,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:54:28,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:54:28,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:28,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3084 backedges. 2 proven. 156 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2022-04-06 20:54:28,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:29,078 INFO L134 CoverageAnalysis]: Checked inductivity of 3084 backedges. 156 proven. 2 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2022-04-06 20:54:29,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787845056] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:29,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:29,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 6, 6] total 90 [2022-04-06 20:54:29,079 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:29,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [5268472] [2022-04-06 20:54:29,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [5268472] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:29,079 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:29,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:54:29,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132049526] [2022-04-06 20:54:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:29,079 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:54:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:54:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=7731, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:54:29,080 INFO L87 Difference]: Start difference. First operand 104 states and 107 transitions. Second operand has 82 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 81 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:34,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:34,114 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2022-04-06 20:54:34,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:54:34,114 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 81 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 98 [2022-04-06 20:54:34,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:34,115 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:54:34,115 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:54:34,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3269 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=751, Invalid=27641, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:54:34,117 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 7327 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 7490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 7327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:34,117 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 358 Invalid, 7490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 7327 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:54:34,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:54:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-04-06 20:54:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 97 states have internal predecessors, (100), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-04-06 20:54:34,130 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2022-04-06 20:54:34,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:34,130 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-04-06 20:54:34,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 81 states have internal predecessors, (92), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-04-06 20:54:34,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 20:54:34,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:34,131 INFO L499 BasicCegarLoop]: trace histogram [79, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:34,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 20:54:34,347 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,SelfDestructingSolverStorable82 [2022-04-06 20:54:34,347 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:34,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 303277570, now seen corresponding path program 147 times [2022-04-06 20:54:34,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:34,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [259707009] [2022-04-06 20:54:34,356 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:34,374 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:34,374 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:34,374 INFO L85 PathProgramCache]: Analyzing trace with hash 303277570, now seen corresponding path program 148 times [2022-04-06 20:54:34,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:34,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548078556] [2022-04-06 20:54:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:34,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:36,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:36,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:36,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-04-06 20:54:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:36,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3163 backedges. 3 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:36,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548078556] [2022-04-06 20:54:36,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548078556] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:36,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921407454] [2022-04-06 20:54:36,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:54:36,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:36,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:36,974 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) [2022-04-06 20:54:36,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:54:37,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:54:37,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:37,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:54:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:37,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3163 backedges. 2 proven. 158 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2022-04-06 20:54:37,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3163 backedges. 158 proven. 2 refuted. 0 times theorem prover too weak. 3003 trivial. 0 not checked. [2022-04-06 20:54:37,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921407454] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:37,856 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:37,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 6, 6] total 91 [2022-04-06 20:54:37,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:37,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [259707009] [2022-04-06 20:54:37,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [259707009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:37,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:37,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 20:54:37,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858883831] [2022-04-06 20:54:37,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:37,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 20:54:37,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:37,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 20:54:37,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=7908, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:54:37,858 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:42,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:42,951 INFO L93 Difference]: Finished difference Result 205 states and 212 transitions. [2022-04-06 20:54:42,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 20:54:42,952 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 99 [2022-04-06 20:54:42,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:42,952 INFO L225 Difference]: With dead ends: 205 [2022-04-06 20:54:42,952 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:54:42,954 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3350 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=760, Invalid=28310, Unknown=0, NotChecked=0, Total=29070 [2022-04-06 20:54:42,954 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 7291 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 7457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 7291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:42,954 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 293 Invalid, 7457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 7291 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:54:42,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:54:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-04-06 20:54:42,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 97 states have (on average 1.041237113402062) internal successors, (101), 98 states have internal predecessors, (101), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 109 transitions. [2022-04-06 20:54:42,968 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 109 transitions. Word has length 99 [2022-04-06 20:54:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:42,968 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 109 transitions. [2022-04-06 20:54:42,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.1204819277108433) internal successors, (93), 82 states have internal predecessors, (93), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:42,969 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 109 transitions. [2022-04-06 20:54:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 20:54:42,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:42,969 INFO L499 BasicCegarLoop]: trace histogram [80, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:42,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:43,183 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:43,183 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:43,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1763952674, now seen corresponding path program 149 times [2022-04-06 20:54:43,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:43,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [521928657] [2022-04-06 20:54:43,193 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:43,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:43,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:43,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1763952674, now seen corresponding path program 150 times [2022-04-06 20:54:43,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:43,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867657130] [2022-04-06 20:54:43,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:43,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:43,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:45,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:45,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:45,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2022-04-06 20:54:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:45,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 3 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:45,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867657130] [2022-04-06 20:54:45,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867657130] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:45,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187582428] [2022-04-06 20:54:45,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:54:45,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:45,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:45,851 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) [2022-04-06 20:54:45,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:54:45,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:54:45,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:45,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:54:45,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:46,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2022-04-06 20:54:46,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:46,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2022-04-06 20:54:46,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187582428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:46,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:46,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 6, 6] total 92 [2022-04-06 20:54:46,691 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:46,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [521928657] [2022-04-06 20:54:46,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [521928657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:46,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:46,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 20:54:46,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060835280] [2022-04-06 20:54:46,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:46,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 20:54:46,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:46,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 20:54:46,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=8107, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:54:46,692 INFO L87 Difference]: Start difference. First operand 106 states and 109 transitions. Second operand has 84 states, 84 states have (on average 1.119047619047619) internal successors, (94), 83 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:54:51,698 INFO L93 Difference]: Finished difference Result 207 states and 214 transitions. [2022-04-06 20:54:51,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 20:54:51,698 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.119047619047619) internal successors, (94), 83 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 100 [2022-04-06 20:54:51,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:54:51,699 INFO L225 Difference]: With dead ends: 207 [2022-04-06 20:54:51,699 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 20:54:51,700 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 369 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3255 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=749, Invalid=29007, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:54:51,701 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 6868 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 7036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 6868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:54:51,701 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 98 Invalid, 7036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 6868 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:54:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 20:54:51,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2022-04-06 20:54:51,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 99 states have internal predecessors, (102), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:54:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2022-04-06 20:54:51,715 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2022-04-06 20:54:51,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:54:51,716 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2022-04-06 20:54:51,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.119047619047619) internal successors, (94), 83 states have internal predecessors, (94), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:54:51,716 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2022-04-06 20:54:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:54:51,716 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:54:51,716 INFO L499 BasicCegarLoop]: trace histogram [81, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:54:51,721 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-04-06 20:54:51,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:51,920 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:54:51,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:54:51,921 INFO L85 PathProgramCache]: Analyzing trace with hash -199759358, now seen corresponding path program 151 times [2022-04-06 20:54:51,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:51,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1010936179] [2022-04-06 20:54:51,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:51,950 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:54:51,950 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:54:51,950 INFO L85 PathProgramCache]: Analyzing trace with hash -199759358, now seen corresponding path program 152 times [2022-04-06 20:54:51,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:54:51,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599939518] [2022-04-06 20:54:51,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:54:51,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:54:51,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:54,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:54:54,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:54,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-04-06 20:54:54,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:54:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 3 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:54:54,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:54:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599939518] [2022-04-06 20:54:54,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599939518] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:54:54,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989400009] [2022-04-06 20:54:54,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:54:54,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:54:54,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:54:54,665 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) [2022-04-06 20:54:54,666 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:54:54,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:54:54,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:54:54,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:54:54,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:54:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 2 proven. 162 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2022-04-06 20:54:55,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:54:55,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3324 backedges. 162 proven. 2 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2022-04-06 20:54:55,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989400009] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:54:55,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:54:55,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 6, 6] total 93 [2022-04-06 20:54:55,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:54:55,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1010936179] [2022-04-06 20:54:55,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1010936179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:54:55,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:54:55,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 20:54:55,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056860657] [2022-04-06 20:54:55,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:54:55,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 20:54:55,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:54:55,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 20:54:55,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=8268, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:54:55,593 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand has 85 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 84 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:00,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:00,972 INFO L93 Difference]: Finished difference Result 209 states and 216 transitions. [2022-04-06 20:55:00,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 20:55:00,972 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 84 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 101 [2022-04-06 20:55:00,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:00,973 INFO L225 Difference]: With dead ends: 209 [2022-04-06 20:55:00,973 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 20:55:00,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3515 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=778, Invalid=29672, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 20:55:00,975 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 7933 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 8102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 7933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:00,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 398 Invalid, 8102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 7933 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:55:00,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 20:55:00,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-04-06 20:55:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 100 states have internal predecessors, (103), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:00,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 111 transitions. [2022-04-06 20:55:00,991 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 111 transitions. Word has length 101 [2022-04-06 20:55:00,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:00,992 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 111 transitions. [2022-04-06 20:55:00,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 84 states have internal predecessors, (95), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:00,992 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 111 transitions. [2022-04-06 20:55:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 20:55:00,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:00,993 INFO L499 BasicCegarLoop]: trace histogram [82, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:01,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:01,207 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,SelfDestructingSolverStorable85 [2022-04-06 20:55:01,207 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:01,208 INFO L85 PathProgramCache]: Analyzing trace with hash -945290206, now seen corresponding path program 153 times [2022-04-06 20:55:01,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:01,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527658841] [2022-04-06 20:55:01,216 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:01,236 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:01,236 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:01,237 INFO L85 PathProgramCache]: Analyzing trace with hash -945290206, now seen corresponding path program 154 times [2022-04-06 20:55:01,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:01,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145766974] [2022-04-06 20:55:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:01,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:03,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:03,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2022-04-06 20:55:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:03,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 3 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:03,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145766974] [2022-04-06 20:55:03,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145766974] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:03,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772152078] [2022-04-06 20:55:03,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:03,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:03,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:03,985 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) [2022-04-06 20:55:03,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:55:04,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:04,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:04,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:55:04,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 2 proven. 164 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2022-04-06 20:55:04,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3406 backedges. 164 proven. 2 refuted. 0 times theorem prover too weak. 3240 trivial. 0 not checked. [2022-04-06 20:55:04,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772152078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:04,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 6, 6] total 94 [2022-04-06 20:55:04,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:04,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527658841] [2022-04-06 20:55:04,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527658841] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:04,913 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:04,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 20:55:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776361818] [2022-04-06 20:55:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:04,913 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 20:55:04,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 20:55:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=8451, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:55:04,915 INFO L87 Difference]: Start difference. First operand 108 states and 111 transitions. Second operand has 86 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 85 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:10,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:10,357 INFO L93 Difference]: Finished difference Result 211 states and 218 transitions. [2022-04-06 20:55:10,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 20:55:10,357 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 85 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 102 [2022-04-06 20:55:10,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:10,358 INFO L225 Difference]: With dead ends: 211 [2022-04-06 20:55:10,358 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:55:10,359 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3599 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=787, Invalid=30365, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:55:10,360 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 7513 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 7685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 7513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:10,360 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 203 Invalid, 7685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 7513 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:55:10,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:55:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 20:55:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 100 states have (on average 1.04) internal successors, (104), 101 states have internal predecessors, (104), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2022-04-06 20:55:10,371 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 102 [2022-04-06 20:55:10,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:10,371 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2022-04-06 20:55:10,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.1162790697674418) internal successors, (96), 85 states have internal predecessors, (96), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2022-04-06 20:55:10,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:55:10,372 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:10,372 INFO L499 BasicCegarLoop]: trace histogram [83, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:10,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:10,596 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:10,596 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1713057282, now seen corresponding path program 155 times [2022-04-06 20:55:10,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:10,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670798517] [2022-04-06 20:55:10,605 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:10,627 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:10,627 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:10,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1713057282, now seen corresponding path program 156 times [2022-04-06 20:55:10,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:10,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602755664] [2022-04-06 20:55:10,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:13,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-04-06 20:55:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:13,471 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 3 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:13,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602755664] [2022-04-06 20:55:13,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602755664] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:13,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169563913] [2022-04-06 20:55:13,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:55:13,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:13,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:13,473 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) [2022-04-06 20:55:13,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:55:13,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:55:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:13,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:55:13,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:13,883 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2022-04-06 20:55:13,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:14,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3489 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2022-04-06 20:55:14,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169563913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:14,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:14,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 6, 6] total 93 [2022-04-06 20:55:14,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:14,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670798517] [2022-04-06 20:55:14,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670798517] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:14,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:14,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 20:55:14,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671674555] [2022-04-06 20:55:14,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:14,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 20:55:14,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:14,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 20:55:14,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=8288, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:55:14,231 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:19,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:19,686 INFO L93 Difference]: Finished difference Result 213 states and 220 transitions. [2022-04-06 20:55:19,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 20:55:19,686 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 103 [2022-04-06 20:55:19,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:19,687 INFO L225 Difference]: With dead ends: 213 [2022-04-06 20:55:19,687 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 20:55:19,688 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 205 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3495 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=770, Invalid=30382, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:55:19,688 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 7817 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 7990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 7817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:19,689 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 248 Invalid, 7990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 7817 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:55:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 20:55:19,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2022-04-06 20:55:19,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 102 states have internal predecessors, (105), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:19,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-04-06 20:55:19,697 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 103 [2022-04-06 20:55:19,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:19,697 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-04-06 20:55:19,697 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.1149425287356323) internal successors, (97), 86 states have internal predecessors, (97), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:19,697 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-04-06 20:55:19,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 20:55:19,698 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:19,698 INFO L499 BasicCegarLoop]: trace histogram [84, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:19,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 20:55:19,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:19,903 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:19,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:19,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1777516510, now seen corresponding path program 157 times [2022-04-06 20:55:19,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:19,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [531620408] [2022-04-06 20:55:19,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:19,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:19,938 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1777516510, now seen corresponding path program 158 times [2022-04-06 20:55:19,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:19,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239841171] [2022-04-06 20:55:19,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:19,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:19,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:22,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-04-06 20:55:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 3 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:22,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239841171] [2022-04-06 20:55:22,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239841171] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999031606] [2022-04-06 20:55:22,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:22,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:22,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:22,803 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) [2022-04-06 20:55:22,804 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:55:22,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:22,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:22,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:55:22,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:23,249 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 2 proven. 168 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-04-06 20:55:23,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:23,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3573 backedges. 168 proven. 2 refuted. 0 times theorem prover too weak. 3403 trivial. 0 not checked. [2022-04-06 20:55:23,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999031606] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:23,721 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:23,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 6, 6] total 96 [2022-04-06 20:55:23,722 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:23,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [531620408] [2022-04-06 20:55:23,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [531620408] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:23,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:23,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 20:55:23,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77727238] [2022-04-06 20:55:23,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:23,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 20:55:23,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:23,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 20:55:23,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=8823, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:55:23,723 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 88 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 87 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:29,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:29,437 INFO L93 Difference]: Finished difference Result 215 states and 222 transitions. [2022-04-06 20:55:29,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 20:55:29,438 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 87 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 104 [2022-04-06 20:55:29,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:29,439 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:55:29,439 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:55:29,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3770 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=805, Invalid=31775, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 20:55:29,441 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 8091 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 8267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 8091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:29,441 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 283 Invalid, 8267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 8091 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:55:29,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:55:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-04-06 20:55:29,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 103 states have internal predecessors, (106), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:29,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2022-04-06 20:55:29,454 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 104 [2022-04-06 20:55:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:29,454 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2022-04-06 20:55:29,454 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.1136363636363635) internal successors, (98), 87 states have internal predecessors, (98), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:29,454 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2022-04-06 20:55:29,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 20:55:29,455 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:29,455 INFO L499 BasicCegarLoop]: trace histogram [85, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:29,478 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-04-06 20:55:29,671 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,SelfDestructingSolverStorable88 [2022-04-06 20:55:29,671 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:29,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1683845634, now seen corresponding path program 159 times [2022-04-06 20:55:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:29,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806892400] [2022-04-06 20:55:29,680 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:29,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:29,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:29,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1683845634, now seen corresponding path program 160 times [2022-04-06 20:55:29,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:29,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950964877] [2022-04-06 20:55:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:29,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:29,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:32,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:32,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-04-06 20:55:32,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:32,665 INFO L134 CoverageAnalysis]: Checked inductivity of 3658 backedges. 3 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:32,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950964877] [2022-04-06 20:55:32,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950964877] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:32,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544822941] [2022-04-06 20:55:32,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:55:32,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:32,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:32,666 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) [2022-04-06 20:55:32,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:55:32,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:55:32,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:55:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:33,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3658 backedges. 2 proven. 170 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2022-04-06 20:55:33,117 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:33,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3658 backedges. 170 proven. 2 refuted. 0 times theorem prover too weak. 3486 trivial. 0 not checked. [2022-04-06 20:55:33,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544822941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:33,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:33,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 6, 6] total 97 [2022-04-06 20:55:33,591 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:33,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806892400] [2022-04-06 20:55:33,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806892400] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:33,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:33,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 20:55:33,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377268444] [2022-04-06 20:55:33,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:33,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 20:55:33,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:33,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 20:55:33,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=9012, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:55:33,592 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand has 89 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 88 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:39,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:39,412 INFO L93 Difference]: Finished difference Result 217 states and 224 transitions. [2022-04-06 20:55:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 20:55:39,412 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 88 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 105 [2022-04-06 20:55:39,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:39,413 INFO L225 Difference]: With dead ends: 217 [2022-04-06 20:55:39,413 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 20:55:39,415 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3857 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=814, Invalid=32492, Unknown=0, NotChecked=0, Total=33306 [2022-04-06 20:55:39,415 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 8294 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 8471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 8294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:39,415 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 293 Invalid, 8471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 8294 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:55:39,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 20:55:39,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-04-06 20:55:39,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 103 states have (on average 1.0388349514563107) internal successors, (107), 104 states have internal predecessors, (107), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-04-06 20:55:39,425 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 105 [2022-04-06 20:55:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:39,425 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-04-06 20:55:39,425 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.1123595505617978) internal successors, (99), 88 states have internal predecessors, (99), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-04-06 20:55:39,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 20:55:39,426 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:39,426 INFO L499 BasicCegarLoop]: trace histogram [86, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:39,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-04-06 20:55:39,650 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:39,650 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:39,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:39,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1611889698, now seen corresponding path program 161 times [2022-04-06 20:55:39,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:39,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1610849806] [2022-04-06 20:55:39,659 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:39,686 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:39,686 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:39,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1611889698, now seen corresponding path program 162 times [2022-04-06 20:55:39,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:39,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326342164] [2022-04-06 20:55:39,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:39,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:39,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:42,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:42,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:42,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-04-06 20:55:42,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:42,757 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 3 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:42,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326342164] [2022-04-06 20:55:42,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326342164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:42,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40462066] [2022-04-06 20:55:42,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:55:42,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:42,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:42,758 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) [2022-04-06 20:55:42,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:55:42,803 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:55:42,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:42,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:55:42,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:43,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2022-04-06 20:55:43,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3744 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2022-04-06 20:55:43,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40462066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:43,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:43,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 6, 6] total 98 [2022-04-06 20:55:43,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:43,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1610849806] [2022-04-06 20:55:43,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1610849806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:43,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:43,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 20:55:43,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085819625] [2022-04-06 20:55:43,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:43,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 20:55:43,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:43,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 20:55:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=9223, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:55:43,688 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 90 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 89 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:49,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:49,539 INFO L93 Difference]: Finished difference Result 219 states and 226 transitions. [2022-04-06 20:55:49,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 20:55:49,539 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 89 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 106 [2022-04-06 20:55:49,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:49,540 INFO L225 Difference]: With dead ends: 219 [2022-04-06 20:55:49,540 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 20:55:49,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3756 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=803, Invalid=33237, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:55:49,542 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 8392 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 8572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 8392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:49,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 268 Invalid, 8572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 8392 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:55:49,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 20:55:49,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2022-04-06 20:55:49,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 104 states have (on average 1.0384615384615385) internal successors, (108), 105 states have internal predecessors, (108), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:49,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2022-04-06 20:55:49,552 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 106 [2022-04-06 20:55:49,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:49,552 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2022-04-06 20:55:49,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 89 states have internal predecessors, (100), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:49,552 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2022-04-06 20:55:49,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:55:49,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:49,553 INFO L499 BasicCegarLoop]: trace histogram [87, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:49,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:55:49,758 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:49,758 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:55:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:55:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash -618744318, now seen corresponding path program 163 times [2022-04-06 20:55:49,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:49,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1316661462] [2022-04-06 20:55:49,767 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:49,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:55:49,788 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:55:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash -618744318, now seen corresponding path program 164 times [2022-04-06 20:55:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:55:49,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467634263] [2022-04-06 20:55:49,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:55:49,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:55:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:52,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:55:52,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:52,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-04-06 20:55:52,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:55:52,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 3 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:55:52,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:55:52,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467634263] [2022-04-06 20:55:52,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467634263] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:55:52,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777427929] [2022-04-06 20:55:52,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:55:52,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:55:52,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:55:52,894 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) [2022-04-06 20:55:52,894 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:55:52,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:55:52,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:55:52,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:55:52,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:55:53,349 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 2 proven. 174 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2022-04-06 20:55:53,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:55:53,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3831 backedges. 174 proven. 2 refuted. 0 times theorem prover too weak. 3655 trivial. 0 not checked. [2022-04-06 20:55:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777427929] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:55:53,829 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:55:53,829 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 6, 6] total 99 [2022-04-06 20:55:53,829 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:55:53,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1316661462] [2022-04-06 20:55:53,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1316661462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:55:53,829 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:55:53,830 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 20:55:53,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524523942] [2022-04-06 20:55:53,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:55:53,830 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 20:55:53,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:55:53,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 20:55:53,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=9396, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:55:53,831 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand has 91 states, 91 states have (on average 1.10989010989011) internal successors, (101), 90 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:59,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:55:59,815 INFO L93 Difference]: Finished difference Result 221 states and 228 transitions. [2022-04-06 20:55:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 20:55:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.10989010989011) internal successors, (101), 90 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 107 [2022-04-06 20:55:59,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:55:59,820 INFO L225 Difference]: With dead ends: 221 [2022-04-06 20:55:59,820 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 20:55:59,822 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4034 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=832, Invalid=33950, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:55:59,822 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 8809 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 8990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 8809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:55:59,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 348 Invalid, 8990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 8809 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:55:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 20:55:59,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-04-06 20:55:59,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 106 states have internal predecessors, (109), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:55:59,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 117 transitions. [2022-04-06 20:55:59,837 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 117 transitions. Word has length 107 [2022-04-06 20:55:59,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:55:59,838 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 117 transitions. [2022-04-06 20:55:59,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.10989010989011) internal successors, (101), 90 states have internal predecessors, (101), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:55:59,838 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 117 transitions. [2022-04-06 20:55:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 20:55:59,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:55:59,838 INFO L499 BasicCegarLoop]: trace histogram [88, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:55:59,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-04-06 20:56:00,051 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:00,051 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:00,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:00,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1048922078, now seen corresponding path program 165 times [2022-04-06 20:56:00,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:00,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1460223108] [2022-04-06 20:56:00,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:00,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:00,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1048922078, now seen corresponding path program 166 times [2022-04-06 20:56:00,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:00,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731967501] [2022-04-06 20:56:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:03,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2022-04-06 20:56:03,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:03,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3919 backedges. 3 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:03,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:03,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731967501] [2022-04-06 20:56:03,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731967501] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:03,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581361951] [2022-04-06 20:56:03,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:56:03,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:03,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:03,197 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) [2022-04-06 20:56:03,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:56:03,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:56:03,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:03,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:56:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3919 backedges. 2 proven. 176 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2022-04-06 20:56:03,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3919 backedges. 176 proven. 2 refuted. 0 times theorem prover too weak. 3741 trivial. 0 not checked. [2022-04-06 20:56:04,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581361951] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:04,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:04,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 6, 6] total 100 [2022-04-06 20:56:04,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:04,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1460223108] [2022-04-06 20:56:04,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1460223108] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:04,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:04,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 20:56:04,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866007023] [2022-04-06 20:56:04,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:04,137 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 20:56:04,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:04,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 20:56:04,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=9591, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 20:56:04,138 INFO L87 Difference]: Start difference. First operand 114 states and 117 transitions. Second operand has 92 states, 92 states have (on average 1.108695652173913) internal successors, (102), 91 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:10,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:10,085 INFO L93 Difference]: Finished difference Result 223 states and 230 transitions. [2022-04-06 20:56:10,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 20:56:10,086 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.108695652173913) internal successors, (102), 91 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 108 [2022-04-06 20:56:10,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:10,086 INFO L225 Difference]: With dead ends: 223 [2022-04-06 20:56:10,086 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:56:10,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 401 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4124 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=841, Invalid=34691, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 20:56:10,088 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 8327 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 8510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 8327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:10,088 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 128 Invalid, 8510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 8327 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:56:10,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:56:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-06 20:56:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 106 states have (on average 1.0377358490566038) internal successors, (110), 107 states have internal predecessors, (110), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-04-06 20:56:10,103 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 108 [2022-04-06 20:56:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:10,103 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-04-06 20:56:10,104 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.108695652173913) internal successors, (102), 91 states have internal predecessors, (102), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-04-06 20:56:10,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:56:10,104 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:10,104 INFO L499 BasicCegarLoop]: trace histogram [89, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:10,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:10,318 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,SelfDestructingSolverStorable92 [2022-04-06 20:56:10,318 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:10,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:10,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1499530750, now seen corresponding path program 167 times [2022-04-06 20:56:10,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:10,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [201118291] [2022-04-06 20:56:10,330 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:10,361 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:10,361 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:10,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1499530750, now seen corresponding path program 168 times [2022-04-06 20:56:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:10,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096039301] [2022-04-06 20:56:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:13,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:13,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:13,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-04-06 20:56:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4008 backedges. 3 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096039301] [2022-04-06 20:56:13,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096039301] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904988719] [2022-04-06 20:56:13,751 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:13,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:13,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:13,752 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) [2022-04-06 20:56:13,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:56:13,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:56:13,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:13,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:56:13,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4008 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-04-06 20:56:14,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:14,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4008 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-04-06 20:56:14,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904988719] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:14,454 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:14,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 4, 4] total 97 [2022-04-06 20:56:14,454 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:14,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [201118291] [2022-04-06 20:56:14,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [201118291] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:14,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:14,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 20:56:14,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302037865] [2022-04-06 20:56:14,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:14,455 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 20:56:14,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 20:56:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=9028, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:56:14,455 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 93 states, 93 states have (on average 1.10752688172043) internal successors, (103), 92 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:20,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:20,731 INFO L93 Difference]: Finished difference Result 225 states and 232 transitions. [2022-04-06 20:56:20,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 20:56:20,732 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.10752688172043) internal successors, (103), 92 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 109 [2022-04-06 20:56:20,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:20,733 INFO L225 Difference]: With dead ends: 225 [2022-04-06 20:56:20,733 INFO L226 Difference]: Without dead ends: 117 [2022-04-06 20:56:20,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4010 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=822, Invalid=33960, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 20:56:20,735 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 9407 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 9592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 9407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:20,735 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 428 Invalid, 9592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 9407 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:56:20,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-04-06 20:56:20,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2022-04-06 20:56:20,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 107 states have (on average 1.0373831775700935) internal successors, (111), 108 states have internal predecessors, (111), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 119 transitions. [2022-04-06 20:56:20,750 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 119 transitions. Word has length 109 [2022-04-06 20:56:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:20,750 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 119 transitions. [2022-04-06 20:56:20,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.10752688172043) internal successors, (103), 92 states have internal predecessors, (103), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:20,750 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 119 transitions. [2022-04-06 20:56:20,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 20:56:20,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:20,751 INFO L499 BasicCegarLoop]: trace histogram [90, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:20,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:20,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:20,975 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:20,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:20,975 INFO L85 PathProgramCache]: Analyzing trace with hash 1711469602, now seen corresponding path program 169 times [2022-04-06 20:56:20,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:20,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [415698947] [2022-04-06 20:56:20,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:21,026 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:21,026 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:21,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1711469602, now seen corresponding path program 170 times [2022-04-06 20:56:21,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:21,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120442515] [2022-04-06 20:56:21,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:21,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:21,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:24,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:24,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2022-04-06 20:56:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:24,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 3 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:24,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120442515] [2022-04-06 20:56:24,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120442515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:24,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923863823] [2022-04-06 20:56:24,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:24,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:24,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:24,380 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) [2022-04-06 20:56:24,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:56:24,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:24,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:24,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:56:24,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:24,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 2 proven. 180 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2022-04-06 20:56:24,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:25,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4098 backedges. 180 proven. 2 refuted. 0 times theorem prover too weak. 3916 trivial. 0 not checked. [2022-04-06 20:56:25,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923863823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:25,397 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:25,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 6, 6] total 102 [2022-04-06 20:56:25,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:25,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [415698947] [2022-04-06 20:56:25,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [415698947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:25,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:25,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 20:56:25,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838433708] [2022-04-06 20:56:25,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:25,397 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 20:56:25,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:25,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 20:56:25,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=9987, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:56:25,398 INFO L87 Difference]: Start difference. First operand 116 states and 119 transitions. Second operand has 94 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:31,863 INFO L93 Difference]: Finished difference Result 227 states and 234 transitions. [2022-04-06 20:56:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 20:56:31,864 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 110 [2022-04-06 20:56:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:31,865 INFO L225 Difference]: With dead ends: 227 [2022-04-06 20:56:31,865 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:56:31,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4307 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=859, Invalid=36197, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 20:56:31,866 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 9289 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 9476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 9289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:31,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 328 Invalid, 9476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 9289 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:56:31,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:56:31,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-04-06 20:56:31,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 108 states have (on average 1.037037037037037) internal successors, (112), 109 states have internal predecessors, (112), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:31,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2022-04-06 20:56:31,881 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 110 [2022-04-06 20:56:31,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:31,881 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2022-04-06 20:56:31,881 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 93 states have internal predecessors, (104), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:31,881 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2022-04-06 20:56:31,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 20:56:31,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:31,882 INFO L499 BasicCegarLoop]: trace histogram [91, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:31,899 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-04-06 20:56:32,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:32,082 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:32,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:32,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1826734590, now seen corresponding path program 171 times [2022-04-06 20:56:32,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:32,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023574972] [2022-04-06 20:56:32,092 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:32,123 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:32,124 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:32,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1826734590, now seen corresponding path program 172 times [2022-04-06 20:56:32,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:32,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635686238] [2022-04-06 20:56:32,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:32,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:35,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-04-06 20:56:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:35,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 3 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:35,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635686238] [2022-04-06 20:56:35,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635686238] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:35,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609177808] [2022-04-06 20:56:35,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:56:35,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:35,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:35,475 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) [2022-04-06 20:56:35,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:56:35,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:56:35,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:35,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:56:35,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:35,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 2 proven. 182 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-04-06 20:56:35,997 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4189 backedges. 182 proven. 2 refuted. 0 times theorem prover too weak. 4005 trivial. 0 not checked. [2022-04-06 20:56:36,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609177808] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:36,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:36,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 6, 6] total 103 [2022-04-06 20:56:36,521 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:36,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023574972] [2022-04-06 20:56:36,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023574972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:36,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:36,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 20:56:36,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792513746] [2022-04-06 20:56:36,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:36,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 20:56:36,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:36,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 20:56:36,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=10188, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:56:36,523 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand has 95 states, 95 states have (on average 1.105263157894737) internal successors, (105), 94 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:43,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:43,066 INFO L93 Difference]: Finished difference Result 229 states and 236 transitions. [2022-04-06 20:56:43,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 20:56:43,066 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.105263157894737) internal successors, (105), 94 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 111 [2022-04-06 20:56:43,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:43,067 INFO L225 Difference]: With dead ends: 229 [2022-04-06 20:56:43,067 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:56:43,068 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4400 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=868, Invalid=36962, Unknown=0, NotChecked=0, Total=37830 [2022-04-06 20:56:43,069 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 9488 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 9677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 9488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:43,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 333 Invalid, 9677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 9488 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:56:43,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:56:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-04-06 20:56:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 109 states have (on average 1.036697247706422) internal successors, (113), 110 states have internal predecessors, (113), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 121 transitions. [2022-04-06 20:56:43,080 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 121 transitions. Word has length 111 [2022-04-06 20:56:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:43,080 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 121 transitions. [2022-04-06 20:56:43,080 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.105263157894737) internal successors, (105), 94 states have internal predecessors, (105), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 121 transitions. [2022-04-06 20:56:43,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-04-06 20:56:43,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:43,080 INFO L499 BasicCegarLoop]: trace histogram [92, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:43,097 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 20:56:43,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:43,281 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:43,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:43,281 INFO L85 PathProgramCache]: Analyzing trace with hash 158085154, now seen corresponding path program 173 times [2022-04-06 20:56:43,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:43,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [673937803] [2022-04-06 20:56:43,292 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:43,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:43,318 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:43,318 INFO L85 PathProgramCache]: Analyzing trace with hash 158085154, now seen corresponding path program 174 times [2022-04-06 20:56:43,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:43,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441023501] [2022-04-06 20:56:43,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:43,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:46,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:46,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-04-06 20:56:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 3 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:46,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441023501] [2022-04-06 20:56:46,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441023501] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:46,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085030813] [2022-04-06 20:56:46,733 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:56:46,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:46,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:46,734 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) [2022-04-06 20:56:46,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:56:46,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:56:46,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:46,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:56:46,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:47,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2022-04-06 20:56:47,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:47,693 INFO L134 CoverageAnalysis]: Checked inductivity of 4281 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2022-04-06 20:56:47,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085030813] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:47,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:47,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 6, 6] total 104 [2022-04-06 20:56:47,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:47,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [673937803] [2022-04-06 20:56:47,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [673937803] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:47,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:47,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 20:56:47,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315039496] [2022-04-06 20:56:47,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:47,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 20:56:47,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:47,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 20:56:47,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=10411, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 20:56:47,695 INFO L87 Difference]: Start difference. First operand 118 states and 121 transitions. Second operand has 96 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 95 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:54,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:56:54,269 INFO L93 Difference]: Finished difference Result 231 states and 238 transitions. [2022-04-06 20:56:54,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 20:56:54,269 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 95 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 112 [2022-04-06 20:56:54,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:56:54,270 INFO L225 Difference]: With dead ends: 231 [2022-04-06 20:56:54,270 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 20:56:54,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4293 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=857, Invalid=37755, Unknown=0, NotChecked=0, Total=38612 [2022-04-06 20:56:54,273 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9209 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 9400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 9209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:56:54,273 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 178 Invalid, 9400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 9209 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:56:54,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 20:56:54,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2022-04-06 20:56:54,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 111 states have internal predecessors, (114), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:56:54,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2022-04-06 20:56:54,288 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 112 [2022-04-06 20:56:54,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:56:54,288 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2022-04-06 20:56:54,288 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 95 states have internal predecessors, (106), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:56:54,289 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2022-04-06 20:56:54,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:56:54,289 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:56:54,289 INFO L499 BasicCegarLoop]: trace histogram [93, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:56:54,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2022-04-06 20:56:54,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:54,490 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:56:54,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:56:54,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1557955074, now seen corresponding path program 175 times [2022-04-06 20:56:54,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:54,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [683292594] [2022-04-06 20:56:54,499 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:54,541 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:56:54,541 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:56:54,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1557955074, now seen corresponding path program 176 times [2022-04-06 20:56:54,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:56:54,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517093104] [2022-04-06 20:56:54,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:56:54,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:56:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:58,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:56:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:58,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-04-06 20:56:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:56:58,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 3 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:56:58,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:56:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517093104] [2022-04-06 20:56:58,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517093104] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:56:58,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592755945] [2022-04-06 20:56:58,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:56:58,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:56:58,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:56:58,066 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) [2022-04-06 20:56:58,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:56:58,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:56:58,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:56:58,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:56:58,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:56:58,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 2 proven. 186 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-04-06 20:56:58,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:56:59,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4374 backedges. 186 proven. 2 refuted. 0 times theorem prover too weak. 4186 trivial. 0 not checked. [2022-04-06 20:56:59,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592755945] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:56:59,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:56:59,064 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 6, 6] total 105 [2022-04-06 20:56:59,064 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:56:59,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [683292594] [2022-04-06 20:56:59,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [683292594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:56:59,064 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:56:59,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 20:56:59,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276929640] [2022-04-06 20:56:59,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:56:59,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 20:56:59,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:56:59,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 20:56:59,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=10596, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:56:59,066 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 97 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 96 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:05,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:05,661 INFO L93 Difference]: Finished difference Result 233 states and 240 transitions. [2022-04-06 20:57:05,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 20:57:05,661 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 96 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 113 [2022-04-06 20:57:05,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:05,662 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:57:05,662 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 20:57:05,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4589 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=886, Invalid=38516, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:57:05,664 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 9201 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 9395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 9201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:05,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 113 Invalid, 9395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 9201 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:57:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 20:57:05,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-04-06 20:57:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 111 states have (on average 1.0360360360360361) internal successors, (115), 112 states have internal predecessors, (115), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:05,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-04-06 20:57:05,680 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 113 [2022-04-06 20:57:05,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:05,680 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-04-06 20:57:05,680 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.1030927835051547) internal successors, (107), 96 states have internal predecessors, (107), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:05,680 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-04-06 20:57:05,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 20:57:05,681 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:05,681 INFO L499 BasicCegarLoop]: trace histogram [94, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:05,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-04-06 20:57:05,891 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,SelfDestructingSolverStorable97 [2022-04-06 20:57:05,892 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2004249634, now seen corresponding path program 177 times [2022-04-06 20:57:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890212910] [2022-04-06 20:57:05,902 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:05,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:05,939 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2004249634, now seen corresponding path program 178 times [2022-04-06 20:57:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:05,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120896566] [2022-04-06 20:57:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:05,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:09,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:09,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:09,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-04-06 20:57:09,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:09,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4468 backedges. 3 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:09,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120896566] [2022-04-06 20:57:09,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120896566] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:09,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336455110] [2022-04-06 20:57:09,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:09,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:09,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:09,499 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) [2022-04-06 20:57:09,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:57:09,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:09,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:09,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:57:09,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4468 backedges. 2 proven. 188 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2022-04-06 20:57:09,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4468 backedges. 188 proven. 2 refuted. 0 times theorem prover too weak. 4278 trivial. 0 not checked. [2022-04-06 20:57:10,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336455110] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:10,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:10,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 6, 6] total 106 [2022-04-06 20:57:10,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:10,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890212910] [2022-04-06 20:57:10,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890212910] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:10,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:10,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 20:57:10,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253061660] [2022-04-06 20:57:10,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:10,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 20:57:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:10,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 20:57:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=10803, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:57:10,515 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 97 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:17,554 INFO L93 Difference]: Finished difference Result 235 states and 242 transitions. [2022-04-06 20:57:17,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 20:57:17,554 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 97 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 114 [2022-04-06 20:57:17,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:17,555 INFO L225 Difference]: With dead ends: 235 [2022-04-06 20:57:17,555 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:57:17,557 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4685 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=895, Invalid=39305, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 20:57:17,557 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 10412 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 453 SdHoareTripleChecker+Invalid, 10607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 10412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:17,557 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 453 Invalid, 10607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 10412 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:57:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:57:17,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-04-06 20:57:17,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 112 states have (on average 1.0357142857142858) internal successors, (116), 113 states have internal predecessors, (116), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:17,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2022-04-06 20:57:17,568 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 114 [2022-04-06 20:57:17,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:17,568 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2022-04-06 20:57:17,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.1020408163265305) internal successors, (108), 97 states have internal predecessors, (108), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:17,568 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2022-04-06 20:57:17,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:57:17,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:17,569 INFO L499 BasicCegarLoop]: trace histogram [95, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:17,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:57:17,785 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,SelfDestructingSolverStorable98 [2022-04-06 20:57:17,785 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:17,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1340488190, now seen corresponding path program 179 times [2022-04-06 20:57:17,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:17,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67908698] [2022-04-06 20:57:17,794 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:17,825 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:17,825 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:17,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1340488190, now seen corresponding path program 180 times [2022-04-06 20:57:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:17,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426743192] [2022-04-06 20:57:17,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:17,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:17,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:21,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:21,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:21,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-04-06 20:57:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4563 backedges. 3 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:21,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426743192] [2022-04-06 20:57:21,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426743192] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179684766] [2022-04-06 20:57:21,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:57:21,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:21,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:21,404 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) [2022-04-06 20:57:21,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:57:21,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:57:21,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:21,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:57:21,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4563 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-04-06 20:57:21,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4563 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-04-06 20:57:22,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179684766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:22,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:22,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 6, 6] total 107 [2022-04-06 20:57:22,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:22,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67908698] [2022-04-06 20:57:22,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67908698] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:22,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:22,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 20:57:22,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811245368] [2022-04-06 20:57:22,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:22,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 20:57:22,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:22,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 20:57:22,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=11032, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:57:22,386 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:29,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:29,589 INFO L93 Difference]: Finished difference Result 237 states and 244 transitions. [2022-04-06 20:57:29,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 20:57:29,589 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 115 [2022-04-06 20:57:29,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:29,590 INFO L225 Difference]: With dead ends: 237 [2022-04-06 20:57:29,590 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 20:57:29,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4575 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=884, Invalid=40122, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 20:57:29,592 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 10514 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 10711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 10514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:29,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 423 Invalid, 10711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 10514 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:57:29,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 20:57:29,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2022-04-06 20:57:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 113 states have (on average 1.0353982300884956) internal successors, (117), 114 states have internal predecessors, (117), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:29,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2022-04-06 20:57:29,608 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 115 [2022-04-06 20:57:29,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:29,608 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2022-04-06 20:57:29,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.101010101010101) internal successors, (109), 98 states have internal predecessors, (109), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2022-04-06 20:57:29,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 20:57:29,609 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:29,609 INFO L499 BasicCegarLoop]: trace histogram [96, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:29,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:29,810 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-04-06 20:57:29,810 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash -1948145630, now seen corresponding path program 181 times [2022-04-06 20:57:29,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:29,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961431077] [2022-04-06 20:57:29,820 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:29,847 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:29,847 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:29,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1948145630, now seen corresponding path program 182 times [2022-04-06 20:57:29,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:29,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794921111] [2022-04-06 20:57:29,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:29,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:29,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:33,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:33,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2022-04-06 20:57:33,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:33,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4659 backedges. 3 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:33,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:33,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794921111] [2022-04-06 20:57:33,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794921111] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:33,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353079759] [2022-04-06 20:57:33,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:57:33,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:33,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:33,475 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) [2022-04-06 20:57:33,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:57:33,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:57:33,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:33,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:57:33,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4659 backedges. 2 proven. 192 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-04-06 20:57:33,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:34,510 INFO L134 CoverageAnalysis]: Checked inductivity of 4659 backedges. 192 proven. 2 refuted. 0 times theorem prover too weak. 4465 trivial. 0 not checked. [2022-04-06 20:57:34,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353079759] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:34,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:34,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 6, 6] total 108 [2022-04-06 20:57:34,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:34,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961431077] [2022-04-06 20:57:34,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961431077] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:34,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:34,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 20:57:34,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852613683] [2022-04-06 20:57:34,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:34,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 20:57:34,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:34,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 20:57:34,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=11223, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 20:57:34,512 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand has 100 states, 100 states have (on average 1.1) internal successors, (110), 99 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:41,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:41,754 INFO L93 Difference]: Finished difference Result 239 states and 246 transitions. [2022-04-06 20:57:41,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 20:57:41,754 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.1) internal successors, (110), 99 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 116 [2022-04-06 20:57:41,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:41,755 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:57:41,755 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:57:41,757 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4880 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=913, Invalid=40907, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:57:41,757 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 10407 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 10607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 10407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:41,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 323 Invalid, 10607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 10407 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:57:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:57:41,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-04-06 20:57:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 114 states have (on average 1.0350877192982457) internal successors, (118), 115 states have internal predecessors, (118), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2022-04-06 20:57:41,774 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 116 [2022-04-06 20:57:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:41,774 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2022-04-06 20:57:41,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.1) internal successors, (110), 99 states have internal predecessors, (110), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:41,774 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2022-04-06 20:57:41,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 20:57:41,775 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:41,775 INFO L499 BasicCegarLoop]: trace histogram [97, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:41,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:41,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:41,980 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:41,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:41,980 INFO L85 PathProgramCache]: Analyzing trace with hash 689310210, now seen corresponding path program 183 times [2022-04-06 20:57:41,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:41,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [642814893] [2022-04-06 20:57:41,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:42,018 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:42,019 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:42,019 INFO L85 PathProgramCache]: Analyzing trace with hash 689310210, now seen corresponding path program 184 times [2022-04-06 20:57:42,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:42,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882609690] [2022-04-06 20:57:42,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:42,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:45,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:45,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:45,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-04-06 20:57:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:45,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4756 backedges. 3 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:45,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882609690] [2022-04-06 20:57:45,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882609690] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:45,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183726483] [2022-04-06 20:57:45,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:57:45,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:45,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:45,775 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) [2022-04-06 20:57:45,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:57:45,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:57:45,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:45,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 366 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:57:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:46,282 INFO L134 CoverageAnalysis]: Checked inductivity of 4756 backedges. 2 proven. 194 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-04-06 20:57:46,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:46,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4756 backedges. 194 proven. 2 refuted. 0 times theorem prover too weak. 4560 trivial. 0 not checked. [2022-04-06 20:57:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183726483] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:46,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 6, 6] total 109 [2022-04-06 20:57:46,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:46,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [642814893] [2022-04-06 20:57:46,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [642814893] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:46,820 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:46,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 20:57:46,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192696371] [2022-04-06 20:57:46,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:46,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 20:57:46,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:46,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 20:57:46,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=11436, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:57:46,822 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:54,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:57:54,328 INFO L93 Difference]: Finished difference Result 241 states and 248 transitions. [2022-04-06 20:57:54,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 20:57:54,328 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 117 [2022-04-06 20:57:54,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:57:54,329 INFO L225 Difference]: With dead ends: 241 [2022-04-06 20:57:54,329 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:57:54,332 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4979 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=922, Invalid=41720, Unknown=0, NotChecked=0, Total=42642 [2022-04-06 20:57:54,332 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 10378 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 10580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 10378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:57:54,332 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 248 Invalid, 10580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 10378 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:57:54,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:57:54,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-04-06 20:57:54,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 116 states have internal predecessors, (119), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:57:54,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-04-06 20:57:54,348 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 117 [2022-04-06 20:57:54,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:57:54,348 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-04-06 20:57:54,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.099009900990099) internal successors, (111), 100 states have internal predecessors, (111), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:57:54,348 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-04-06 20:57:54,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 20:57:54,350 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:57:54,351 INFO L499 BasicCegarLoop]: trace histogram [98, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:57:54,375 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:57:54,563 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,SelfDestructingSolverStorable101 [2022-04-06 20:57:54,563 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:57:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:57:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 846062626, now seen corresponding path program 185 times [2022-04-06 20:57:54,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:54,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1696675142] [2022-04-06 20:57:54,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:54,624 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:57:54,624 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:57:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash 846062626, now seen corresponding path program 186 times [2022-04-06 20:57:54,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:57:54,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125490787] [2022-04-06 20:57:54,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:57:54,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:57:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:58,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:57:58,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:58,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2022-04-06 20:57:58,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:57:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4854 backedges. 3 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:57:58,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:57:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125490787] [2022-04-06 20:57:58,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125490787] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:57:58,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418035734] [2022-04-06 20:57:58,494 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:57:58,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:57:58,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:57:58,495 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) [2022-04-06 20:57:58,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:57:58,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:57:58,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:57:58,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:57:58,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:57:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4854 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-04-06 20:57:58,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:57:59,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4854 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-04-06 20:57:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418035734] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:57:59,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:57:59,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 6, 6] total 110 [2022-04-06 20:57:59,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:57:59,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1696675142] [2022-04-06 20:57:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1696675142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:57:59,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:57:59,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 20:57:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278431548] [2022-04-06 20:57:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:57:59,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 20:57:59,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:57:59,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 20:57:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=11671, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:57:59,445 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 102 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 101 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:06,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:06,925 INFO L93 Difference]: Finished difference Result 243 states and 250 transitions. [2022-04-06 20:58:06,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 20:58:06,926 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 101 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-04-06 20:58:06,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:06,926 INFO L225 Difference]: With dead ends: 243 [2022-04-06 20:58:06,926 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 20:58:06,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 441 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4866 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=911, Invalid=42561, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 20:58:06,929 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 10681 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 10885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 10681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:06,929 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 283 Invalid, 10885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 10681 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:58:06,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 20:58:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2022-04-06 20:58:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 116 states have (on average 1.0344827586206897) internal successors, (120), 117 states have internal predecessors, (120), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-04-06 20:58:06,945 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 118 [2022-04-06 20:58:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:06,945 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-04-06 20:58:06,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 101 states have internal predecessors, (112), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:06,946 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-04-06 20:58:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:58:06,946 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:06,946 INFO L499 BasicCegarLoop]: trace histogram [99, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:06,950 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:58:07,149 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:07,150 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:07,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1410420226, now seen corresponding path program 187 times [2022-04-06 20:58:07,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:07,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [540686563] [2022-04-06 20:58:07,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:07,183 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:07,184 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:07,184 INFO L85 PathProgramCache]: Analyzing trace with hash 1410420226, now seen corresponding path program 188 times [2022-04-06 20:58:07,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:07,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916594223] [2022-04-06 20:58:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:07,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:11,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:11,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-04-06 20:58:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4953 backedges. 3 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:58:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916594223] [2022-04-06 20:58:11,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916594223] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:11,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112331490] [2022-04-06 20:58:11,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:58:11,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:11,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:11,087 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) [2022-04-06 20:58:11,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:58:11,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:58:11,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:11,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:58:11,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4953 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2022-04-06 20:58:11,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:12,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4953 backedges. 198 proven. 2 refuted. 0 times theorem prover too weak. 4753 trivial. 0 not checked. [2022-04-06 20:58:12,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112331490] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:12,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:12,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 6, 6] total 111 [2022-04-06 20:58:12,138 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:12,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [540686563] [2022-04-06 20:58:12,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [540686563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:12,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:12,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 20:58:12,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596039918] [2022-04-06 20:58:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:12,138 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 20:58:12,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 20:58:12,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=11868, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:58:12,139 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 103 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 102 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:19,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:19,522 INFO L93 Difference]: Finished difference Result 245 states and 252 transitions. [2022-04-06 20:58:19,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 20:58:19,523 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 102 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 119 [2022-04-06 20:58:19,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:19,523 INFO L225 Difference]: With dead ends: 245 [2022-04-06 20:58:19,523 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:58:19,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5180 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=940, Invalid=43370, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 20:58:19,526 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 10521 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 10727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 10521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:19,526 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 163 Invalid, 10727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 10521 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-04-06 20:58:19,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:58:19,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-04-06 20:58:19,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 117 states have (on average 1.0341880341880343) internal successors, (121), 118 states have internal predecessors, (121), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 129 transitions. [2022-04-06 20:58:19,536 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 129 transitions. Word has length 119 [2022-04-06 20:58:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:19,537 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 129 transitions. [2022-04-06 20:58:19,537 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 102 states have internal predecessors, (113), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:19,537 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 129 transitions. [2022-04-06 20:58:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-04-06 20:58:19,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:19,537 INFO L499 BasicCegarLoop]: trace histogram [100, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:19,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-04-06 20:58:19,738 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,SelfDestructingSolverStorable103 [2022-04-06 20:58:19,738 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1725636642, now seen corresponding path program 189 times [2022-04-06 20:58:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [207746445] [2022-04-06 20:58:19,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:19,783 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:19,783 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1725636642, now seen corresponding path program 190 times [2022-04-06 20:58:19,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:19,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973438381] [2022-04-06 20:58:19,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:19,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:19,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:23,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:23,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2022-04-06 20:58:23,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:23,734 INFO L134 CoverageAnalysis]: Checked inductivity of 5053 backedges. 3 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:58:23,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:23,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973438381] [2022-04-06 20:58:23,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973438381] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:23,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963693983] [2022-04-06 20:58:23,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:58:23,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:23,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:23,736 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) [2022-04-06 20:58:23,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:58:23,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:58:23,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:23,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:58:23,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:24,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5053 backedges. 2 proven. 200 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-04-06 20:58:24,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5053 backedges. 200 proven. 2 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2022-04-06 20:58:24,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963693983] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:24,794 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:24,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 6, 6] total 112 [2022-04-06 20:58:24,794 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:24,794 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [207746445] [2022-04-06 20:58:24,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [207746445] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:24,794 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:24,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 20:58:24,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109608554] [2022-04-06 20:58:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:24,795 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 20:58:24,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 20:58:24,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=12087, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:58:24,796 INFO L87 Difference]: Start difference. First operand 126 states and 129 transitions. Second operand has 104 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 103 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:32,559 INFO L93 Difference]: Finished difference Result 247 states and 254 transitions. [2022-04-06 20:58:32,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 20:58:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 103 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 120 [2022-04-06 20:58:32,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:32,560 INFO L225 Difference]: With dead ends: 247 [2022-04-06 20:58:32,560 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:58:32,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5282 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=949, Invalid=44207, Unknown=0, NotChecked=0, Total=45156 [2022-04-06 20:58:32,562 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 11308 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 11516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 11308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:32,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 358 Invalid, 11516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 11308 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:58:32,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:58:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-04-06 20:58:32,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 119 states have internal predecessors, (122), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:32,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2022-04-06 20:58:32,573 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 120 [2022-04-06 20:58:32,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:32,573 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2022-04-06 20:58:32,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.0961538461538463) internal successors, (114), 103 states have internal predecessors, (114), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2022-04-06 20:58:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:58:32,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:32,574 INFO L499 BasicCegarLoop]: trace histogram [101, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:32,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:58:32,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:32,779 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1387556350, now seen corresponding path program 191 times [2022-04-06 20:58:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:32,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [308499476] [2022-04-06 20:58:32,788 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:32,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:32,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:32,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1387556350, now seen corresponding path program 192 times [2022-04-06 20:58:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:32,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359226050] [2022-04-06 20:58:32,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:32,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:32,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:36,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:36,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:36,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-04-06 20:58:36,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:36,836 INFO L134 CoverageAnalysis]: Checked inductivity of 5154 backedges. 3 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:58:36,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359226050] [2022-04-06 20:58:36,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359226050] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:36,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590275384] [2022-04-06 20:58:36,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:58:36,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:36,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:36,837 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) [2022-04-06 20:58:36,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:58:36,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:58:36,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:58:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:37,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5154 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2022-04-06 20:58:37,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 5154 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2022-04-06 20:58:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590275384] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:37,741 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:37,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 6, 6] total 111 [2022-04-06 20:58:37,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:37,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [308499476] [2022-04-06 20:58:37,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [308499476] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:37,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:37,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 20:58:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279779073] [2022-04-06 20:58:37,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:37,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 20:58:37,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:37,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 20:58:37,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=11888, Unknown=0, NotChecked=0, Total=12210 [2022-04-06 20:58:37,743 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand has 105 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 104 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:45,688 INFO L93 Difference]: Finished difference Result 249 states and 256 transitions. [2022-04-06 20:58:45,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 20:58:45,688 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 104 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 121 [2022-04-06 20:58:45,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:45,688 INFO L225 Difference]: With dead ends: 249 [2022-04-06 20:58:45,689 INFO L226 Difference]: Without dead ends: 129 [2022-04-06 20:58:45,691 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 241 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5160 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=932, Invalid=44224, Unknown=0, NotChecked=0, Total=45156 [2022-04-06 20:58:45,691 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 11648 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 11857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 11648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:45,691 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 403 Invalid, 11857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 11648 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:58:45,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-04-06 20:58:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2022-04-06 20:58:45,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 119 states have (on average 1.0336134453781514) internal successors, (123), 120 states have internal predecessors, (123), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 131 transitions. [2022-04-06 20:58:45,707 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 131 transitions. Word has length 121 [2022-04-06 20:58:45,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:45,707 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 131 transitions. [2022-04-06 20:58:45,707 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 104 states have internal predecessors, (115), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:45,707 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 131 transitions. [2022-04-06 20:58:45,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 20:58:45,708 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:45,708 INFO L499 BasicCegarLoop]: trace histogram [102, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:45,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2022-04-06 20:58:45,928 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-04-06 20:58:45,928 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:45,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash 887708706, now seen corresponding path program 193 times [2022-04-06 20:58:45,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:45,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576762079] [2022-04-06 20:58:45,938 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:45,993 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:45,993 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:45,993 INFO L85 PathProgramCache]: Analyzing trace with hash 887708706, now seen corresponding path program 194 times [2022-04-06 20:58:45,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:45,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593384355] [2022-04-06 20:58:45,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:45,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:46,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:50,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:58:50,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:50,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-04-06 20:58:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:58:50,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 3 proven. 5253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:58:50,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:58:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593384355] [2022-04-06 20:58:50,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593384355] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:58:50,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471163353] [2022-04-06 20:58:50,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:58:50,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:50,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:58:50,262 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:58:50,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-04-06 20:58:50,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:58:50,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:58:50,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:58:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:58:50,790 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 2 proven. 204 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2022-04-06 20:58:50,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:58:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 5256 backedges. 204 proven. 2 refuted. 0 times theorem prover too weak. 5050 trivial. 0 not checked. [2022-04-06 20:58:51,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471163353] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:58:51,356 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:58:51,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 6, 6] total 114 [2022-04-06 20:58:51,356 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:58:51,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576762079] [2022-04-06 20:58:51,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576762079] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:58:51,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:58:51,356 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 20:58:51,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778209525] [2022-04-06 20:58:51,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:58:51,356 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 20:58:51,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:51,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 20:58:51,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=12531, Unknown=0, NotChecked=0, Total=12882 [2022-04-06 20:58:51,357 INFO L87 Difference]: Start difference. First operand 128 states and 131 transitions. Second operand has 106 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 105 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:59,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:58:59,130 INFO L93 Difference]: Finished difference Result 251 states and 258 transitions. [2022-04-06 20:58:59,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 20:58:59,130 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 105 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 122 [2022-04-06 20:58:59,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:58:59,131 INFO L225 Difference]: With dead ends: 251 [2022-04-06 20:58:59,131 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:58:59,133 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 457 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5489 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=967, Invalid=45905, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:58:59,133 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10743 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10955 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 10743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:58:59,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 33 Invalid, 10955 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 10743 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:58:59,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:58:59,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-04-06 20:58:59,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 121 states have internal predecessors, (124), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:58:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2022-04-06 20:58:59,144 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 122 [2022-04-06 20:58:59,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:58:59,144 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2022-04-06 20:58:59,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 105 states have internal predecessors, (116), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:58:59,144 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2022-04-06 20:58:59,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 20:58:59,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:58:59,145 INFO L499 BasicCegarLoop]: trace histogram [103, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:58:59,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-04-06 20:58:59,348 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:58:59,348 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:58:59,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:58:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1593518590, now seen corresponding path program 195 times [2022-04-06 20:58:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:58:59,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1047896515] [2022-04-06 20:58:59,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:59,395 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:58:59,395 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:58:59,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1593518590, now seen corresponding path program 196 times [2022-04-06 20:58:59,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:58:59,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137355282] [2022-04-06 20:58:59,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:58:59,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:58:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:03,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:03,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-04-06 20:59:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 3 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:03,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137355282] [2022-04-06 20:59:03,572 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137355282] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689815802] [2022-04-06 20:59:03,572 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:03,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:03,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:03,573 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:03,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-04-06 20:59:03,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:03,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:03,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:59:03,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:04,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 2 proven. 206 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2022-04-06 20:59:04,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:04,655 INFO L134 CoverageAnalysis]: Checked inductivity of 5359 backedges. 206 proven. 2 refuted. 0 times theorem prover too weak. 5151 trivial. 0 not checked. [2022-04-06 20:59:04,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689815802] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:04,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:04,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 6, 6] total 115 [2022-04-06 20:59:04,656 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:04,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1047896515] [2022-04-06 20:59:04,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1047896515] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:04,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:04,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:59:04,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742189556] [2022-04-06 20:59:04,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:04,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:59:04,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:04,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:59:04,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=12756, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:59:04,658 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand has 107 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 106 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:12,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:12,675 INFO L93 Difference]: Finished difference Result 253 states and 260 transitions. [2022-04-06 20:59:12,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:59:12,675 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 106 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 123 [2022-04-06 20:59:12,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:12,676 INFO L225 Difference]: With dead ends: 253 [2022-04-06 20:59:12,676 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:59:12,679 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5594 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=976, Invalid=46766, Unknown=0, NotChecked=0, Total=47742 [2022-04-06 20:59:12,679 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 11507 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 11720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 11507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:12,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 11720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 11507 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:59:12,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:59:12,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-04-06 20:59:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 121 states have (on average 1.0330578512396693) internal successors, (125), 122 states have internal predecessors, (125), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:12,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-04-06 20:59:12,696 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 123 [2022-04-06 20:59:12,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:12,696 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-04-06 20:59:12,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0934579439252337) internal successors, (117), 106 states have internal predecessors, (117), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:12,696 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-04-06 20:59:12,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 20:59:12,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:12,697 INFO L499 BasicCegarLoop]: trace histogram [104, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:12,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2022-04-06 20:59:12,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:12,903 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:12,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:12,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1202153438, now seen corresponding path program 197 times [2022-04-06 20:59:12,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:12,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [752016822] [2022-04-06 20:59:12,912 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:12,972 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:12,972 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1202153438, now seen corresponding path program 198 times [2022-04-06 20:59:12,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:12,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540310604] [2022-04-06 20:59:12,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:17,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:17,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:17,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-04-06 20:59:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:17,178 INFO L134 CoverageAnalysis]: Checked inductivity of 5463 backedges. 3 proven. 5460 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:17,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540310604] [2022-04-06 20:59:17,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540310604] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:17,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734858977] [2022-04-06 20:59:17,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:17,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:17,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:17,179 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:17,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-04-06 20:59:17,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:59:17,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:17,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:59:17,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5463 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2022-04-06 20:59:17,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:18,153 INFO L134 CoverageAnalysis]: Checked inductivity of 5463 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2022-04-06 20:59:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734858977] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:18,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:18,153 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 6, 6] total 116 [2022-04-06 20:59:18,153 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:18,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [752016822] [2022-04-06 20:59:18,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [752016822] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:18,153 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:18,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 20:59:18,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251605264] [2022-04-06 20:59:18,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:18,154 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 20:59:18,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:18,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 20:59:18,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=13003, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:59:18,155 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 108 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 107 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:26,227 INFO L93 Difference]: Finished difference Result 255 states and 262 transitions. [2022-04-06 20:59:26,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 20:59:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 107 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 124 [2022-04-06 20:59:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:26,228 INFO L225 Difference]: With dead ends: 255 [2022-04-06 20:59:26,228 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 20:59:26,230 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5475 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=965, Invalid=47655, Unknown=0, NotChecked=0, Total=48620 [2022-04-06 20:59:26,230 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 11491 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 11707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 11491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:26,230 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 143 Invalid, 11707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 11491 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:59:26,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 20:59:26,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-04-06 20:59:26,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 123 states have internal predecessors, (126), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:26,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2022-04-06 20:59:26,242 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 124 [2022-04-06 20:59:26,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:26,242 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2022-04-06 20:59:26,242 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.0925925925925926) internal successors, (118), 107 states have internal predecessors, (118), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:26,242 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2022-04-06 20:59:26,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:59:26,242 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:26,242 INFO L499 BasicCegarLoop]: trace histogram [105, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:26,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-04-06 20:59:26,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2022-04-06 20:59:26,443 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:26,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:26,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1954735614, now seen corresponding path program 199 times [2022-04-06 20:59:26,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:26,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1393056598] [2022-04-06 20:59:26,452 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,490 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:26,490 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1954735614, now seen corresponding path program 200 times [2022-04-06 20:59:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:26,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993355589] [2022-04-06 20:59:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:30,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-04-06 20:59:30,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 3 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:30,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993355589] [2022-04-06 20:59:30,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993355589] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:30,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231566554] [2022-04-06 20:59:30,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:59:30,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:30,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:30,784 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:30,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-04-06 20:59:30,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:59:30,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:59:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:31,318 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 2 proven. 210 refuted. 0 times theorem prover too weak. 5356 trivial. 0 not checked. [2022-04-06 20:59:31,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5568 backedges. 210 proven. 2 refuted. 0 times theorem prover too weak. 5356 trivial. 0 not checked. [2022-04-06 20:59:31,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231566554] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:31,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:31,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 6, 6] total 117 [2022-04-06 20:59:31,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:31,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1393056598] [2022-04-06 20:59:31,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1393056598] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:31,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:31,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 20:59:31,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090389647] [2022-04-06 20:59:31,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:31,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 20:59:31,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:31,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 20:59:31,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=13212, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:59:31,885 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand has 109 states, 109 states have (on average 1.091743119266055) internal successors, (119), 108 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:40,437 INFO L93 Difference]: Finished difference Result 257 states and 264 transitions. [2022-04-06 20:59:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 20:59:40,438 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.091743119266055) internal successors, (119), 108 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 125 [2022-04-06 20:59:40,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:40,438 INFO L225 Difference]: With dead ends: 257 [2022-04-06 20:59:40,438 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 20:59:40,440 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5807 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=994, Invalid=48512, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:59:40,440 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 12904 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 13121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 12904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:40,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 543 Invalid, 13121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 12904 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:59:40,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 20:59:40,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-06 20:59:40,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 123 states have (on average 1.032520325203252) internal successors, (127), 124 states have internal predecessors, (127), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-04-06 20:59:40,457 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 125 [2022-04-06 20:59:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:40,458 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-04-06 20:59:40,458 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.091743119266055) internal successors, (119), 108 states have internal predecessors, (119), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:40,458 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-04-06 20:59:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-04-06 20:59:40,458 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:40,458 INFO L499 BasicCegarLoop]: trace histogram [106, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:40,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-04-06 20:59:40,682 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:40,682 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:40,683 INFO L85 PathProgramCache]: Analyzing trace with hash 485020706, now seen corresponding path program 201 times [2022-04-06 20:59:40,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:40,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2066322262] [2022-04-06 20:59:40,692 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:40,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:40,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:40,742 INFO L85 PathProgramCache]: Analyzing trace with hash 485020706, now seen corresponding path program 202 times [2022-04-06 20:59:40,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:40,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843731017] [2022-04-06 20:59:40,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:40,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-04-06 20:59:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5674 backedges. 3 proven. 5671 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:45,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:45,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843731017] [2022-04-06 20:59:45,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843731017] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:45,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418011187] [2022-04-06 20:59:45,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:59:45,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:45,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:45,102 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:45,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-04-06 20:59:45,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:59:45,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:45,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:59:45,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 5674 backedges. 2 proven. 212 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2022-04-06 20:59:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:59:46,232 INFO L134 CoverageAnalysis]: Checked inductivity of 5674 backedges. 212 proven. 2 refuted. 0 times theorem prover too weak. 5460 trivial. 0 not checked. [2022-04-06 20:59:46,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418011187] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:59:46,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:59:46,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 6, 6] total 118 [2022-04-06 20:59:46,232 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:59:46,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2066322262] [2022-04-06 20:59:46,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2066322262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:59:46,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:59:46,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 20:59:46,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845567130] [2022-04-06 20:59:46,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:59:46,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 20:59:46,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:46,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 20:59:46,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=13443, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:59:46,244 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 110 states, 110 states have (on average 1.0909090909090908) internal successors, (120), 109 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:54,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:59:54,788 INFO L93 Difference]: Finished difference Result 259 states and 266 transitions. [2022-04-06 20:59:54,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 20:59:54,789 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.0909090909090908) internal successors, (120), 109 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 126 [2022-04-06 20:59:54,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:59:54,790 INFO L225 Difference]: With dead ends: 259 [2022-04-06 20:59:54,790 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:59:54,792 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5915 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1003, Invalid=49397, Unknown=0, NotChecked=0, Total=50400 [2022-04-06 20:59:54,792 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 12352 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 12572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 12352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:59:54,792 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 288 Invalid, 12572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 12352 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 20:59:54,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:59:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-04-06 20:59:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 124 states have (on average 1.032258064516129) internal successors, (128), 125 states have internal predecessors, (128), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 20:59:54,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2022-04-06 20:59:54,809 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 126 [2022-04-06 20:59:54,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:59:54,809 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2022-04-06 20:59:54,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.0909090909090908) internal successors, (120), 109 states have internal predecessors, (120), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 20:59:54,809 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2022-04-06 20:59:54,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:59:54,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:59:54,810 INFO L499 BasicCegarLoop]: trace histogram [107, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:59:54,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-04-06 20:59:55,013 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:55,013 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:59:55,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:59:55,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1191944702, now seen corresponding path program 203 times [2022-04-06 20:59:55,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:59:55,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853710256] [2022-04-06 20:59:55,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:55,052 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:59:55,052 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:59:55,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1191944702, now seen corresponding path program 204 times [2022-04-06 20:59:55,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:59:55,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953025786] [2022-04-06 20:59:55,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:59:55,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:59:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:59:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-04-06 20:59:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:59:59,477 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 3 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:59:59,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:59:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953025786] [2022-04-06 20:59:59,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953025786] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:59:59,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761429766] [2022-04-06 20:59:59,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:59:59,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:59:59,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:59:59,478 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:59:59,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-04-06 20:59:59,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:59:59,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:59:59,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:59:59,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:59:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2022-04-06 20:59:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:00,200 INFO L134 CoverageAnalysis]: Checked inductivity of 5781 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2022-04-06 21:00:00,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761429766] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:00,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:00,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 4, 4] total 115 [2022-04-06 21:00:00,200 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:00,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853710256] [2022-04-06 21:00:00,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853710256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:00,200 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:00,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 21:00:00,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93433673] [2022-04-06 21:00:00,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:00,201 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 21:00:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 21:00:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=12772, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 21:00:00,202 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand has 111 states, 111 states have (on average 1.09009009009009) internal successors, (121), 110 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:08,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:08,716 INFO L93 Difference]: Finished difference Result 261 states and 268 transitions. [2022-04-06 21:00:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 21:00:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.09009009009009) internal successors, (121), 110 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 127 [2022-04-06 21:00:08,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:08,717 INFO L225 Difference]: With dead ends: 261 [2022-04-06 21:00:08,717 INFO L226 Difference]: Without dead ends: 135 [2022-04-06 21:00:08,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5783 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=984, Invalid=48522, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 21:00:08,719 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 12538 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 12760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 12538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:08,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 278 Invalid, 12760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 12538 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 21:00:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-04-06 21:00:08,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2022-04-06 21:00:08,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 125 states have (on average 1.032) internal successors, (129), 126 states have internal predecessors, (129), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:08,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 137 transitions. [2022-04-06 21:00:08,731 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 137 transitions. Word has length 127 [2022-04-06 21:00:08,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:08,731 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 137 transitions. [2022-04-06 21:00:08,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.09009009009009) internal successors, (121), 110 states have internal predecessors, (121), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:08,731 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 137 transitions. [2022-04-06 21:00:08,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 21:00:08,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:08,731 INFO L499 BasicCegarLoop]: trace histogram [108, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:08,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-04-06 21:00:08,932 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:08,932 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:08,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1638264798, now seen corresponding path program 205 times [2022-04-06 21:00:08,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:08,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2074079811] [2022-04-06 21:00:08,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:08,974 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:08,974 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:08,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1638264798, now seen corresponding path program 206 times [2022-04-06 21:00:08,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:08,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515123964] [2022-04-06 21:00:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:08,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-04-06 21:00:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:13,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5889 backedges. 3 proven. 5886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:00:13,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515123964] [2022-04-06 21:00:13,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515123964] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:13,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141230891] [2022-04-06 21:00:13,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:13,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:13,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:13,523 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:00:13,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-04-06 21:00:13,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:13,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:13,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:00:13,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 5889 backedges. 2 proven. 216 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-04-06 21:00:14,071 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5889 backedges. 216 proven. 2 refuted. 0 times theorem prover too weak. 5671 trivial. 0 not checked. [2022-04-06 21:00:14,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141230891] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:14,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:14,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 6, 6] total 120 [2022-04-06 21:00:14,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:14,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2074079811] [2022-04-06 21:00:14,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2074079811] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:14,651 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:14,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 21:00:14,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245272088] [2022-04-06 21:00:14,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:14,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 21:00:14,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:14,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 21:00:14,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=13911, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 21:00:14,653 INFO L87 Difference]: Start difference. First operand 134 states and 137 transitions. Second operand has 112 states, 112 states have (on average 1.0892857142857142) internal successors, (122), 111 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:23,388 INFO L93 Difference]: Finished difference Result 263 states and 270 transitions. [2022-04-06 21:00:23,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 21:00:23,388 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.0892857142857142) internal successors, (122), 111 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 128 [2022-04-06 21:00:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:23,389 INFO L225 Difference]: With dead ends: 263 [2022-04-06 21:00:23,389 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 21:00:23,392 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6134 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=1021, Invalid=51191, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 21:00:23,392 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 12621 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 12845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 12621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:23,392 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 233 Invalid, 12845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 12621 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 21:00:23,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 21:00:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-04-06 21:00:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 126 states have (on average 1.0317460317460319) internal successors, (130), 127 states have internal predecessors, (130), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-04-06 21:00:23,406 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 128 [2022-04-06 21:00:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:23,406 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-04-06 21:00:23,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.0892857142857142) internal successors, (122), 111 states have internal predecessors, (122), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-04-06 21:00:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 21:00:23,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:23,407 INFO L499 BasicCegarLoop]: trace histogram [109, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:23,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-04-06 21:00:23,608 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2022-04-06 21:00:23,608 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:23,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:23,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1705681410, now seen corresponding path program 207 times [2022-04-06 21:00:23,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:23,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041028201] [2022-04-06 21:00:23,617 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:23,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:23,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1705681410, now seen corresponding path program 208 times [2022-04-06 21:00:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709243875] [2022-04-06 21:00:23,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:23,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:28,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:28,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-04-06 21:00:28,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:28,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5998 backedges. 3 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:00:28,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:28,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709243875] [2022-04-06 21:00:28,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709243875] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:28,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921178830] [2022-04-06 21:00:28,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:00:28,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:28,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:28,224 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:00:28,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-04-06 21:00:28,304 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:00:28,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:28,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 21:00:28,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5998 backedges. 2 proven. 218 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2022-04-06 21:00:28,780 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5998 backedges. 218 proven. 2 refuted. 0 times theorem prover too weak. 5778 trivial. 0 not checked. [2022-04-06 21:00:29,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921178830] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:29,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:29,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 6, 6] total 121 [2022-04-06 21:00:29,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:29,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041028201] [2022-04-06 21:00:29,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041028201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:29,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:29,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 21:00:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64054948] [2022-04-06 21:00:29,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:29,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 21:00:29,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 21:00:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=14148, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 21:00:29,364 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 113 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 112 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:38,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:38,414 INFO L93 Difference]: Finished difference Result 265 states and 272 transitions. [2022-04-06 21:00:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 21:00:38,414 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 112 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 129 [2022-04-06 21:00:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:38,414 INFO L225 Difference]: With dead ends: 265 [2022-04-06 21:00:38,415 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 21:00:38,417 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6245 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1030, Invalid=52100, Unknown=0, NotChecked=0, Total=53130 [2022-04-06 21:00:38,417 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 13382 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 13607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 13382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:38,417 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 413 Invalid, 13607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 13382 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-04-06 21:00:38,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 21:00:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-04-06 21:00:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 127 states have (on average 1.031496062992126) internal successors, (131), 128 states have internal predecessors, (131), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:38,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-04-06 21:00:38,444 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 129 [2022-04-06 21:00:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:38,444 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-04-06 21:00:38,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.0884955752212389) internal successors, (123), 112 states have internal predecessors, (123), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:38,444 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-04-06 21:00:38,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 21:00:38,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:38,445 INFO L499 BasicCegarLoop]: trace histogram [110, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:38,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2022-04-06 21:00:38,669 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2022-04-06 21:00:38,669 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:38,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:38,669 INFO L85 PathProgramCache]: Analyzing trace with hash -2006168542, now seen corresponding path program 209 times [2022-04-06 21:00:38,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:38,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1458306070] [2022-04-06 21:00:38,678 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:38,714 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:38,714 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:38,714 INFO L85 PathProgramCache]: Analyzing trace with hash -2006168542, now seen corresponding path program 210 times [2022-04-06 21:00:38,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:38,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36106188] [2022-04-06 21:00:38,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:38,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:43,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:43,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:43,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-04-06 21:00:43,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:43,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6108 backedges. 3 proven. 6105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:00:43,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:43,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36106188] [2022-04-06 21:00:43,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36106188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:43,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21386330] [2022-04-06 21:00:43,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:00:43,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:43,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:43,365 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:00:43,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-04-06 21:00:43,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:00:43,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:43,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:00:43,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:43,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2022-04-06 21:00:43,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:44,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6108 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6105 trivial. 0 not checked. [2022-04-06 21:00:44,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21386330] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:44,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:44,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 4, 4] total 118 [2022-04-06 21:00:44,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:44,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1458306070] [2022-04-06 21:00:44,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1458306070] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:44,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:44,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-04-06 21:00:44,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294076133] [2022-04-06 21:00:44,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:44,108 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-06 21:00:44,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:44,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-06 21:00:44,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=13459, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 21:00:44,109 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 114 states, 114 states have (on average 1.087719298245614) internal successors, (124), 113 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:52,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:00:52,993 INFO L93 Difference]: Finished difference Result 267 states and 274 transitions. [2022-04-06 21:00:52,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 21:00:52,995 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.087719298245614) internal successors, (124), 113 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 130 [2022-04-06 21:00:52,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:00:52,996 INFO L225 Difference]: With dead ends: 267 [2022-04-06 21:00:52,996 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 21:00:53,000 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6110 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1011, Invalid=51201, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 21:00:53,000 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 18 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 12913 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 13141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 12913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:00:53,000 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 183 Invalid, 13141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 12913 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-04-06 21:00:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 21:00:53,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2022-04-06 21:00:53,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 128 states have (on average 1.03125) internal successors, (132), 129 states have internal predecessors, (132), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:00:53,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2022-04-06 21:00:53,013 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 130 [2022-04-06 21:00:53,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:00:53,014 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2022-04-06 21:00:53,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.087719298245614) internal successors, (124), 113 states have internal predecessors, (124), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:00:53,014 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2022-04-06 21:00:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 21:00:53,014 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:00:53,014 INFO L499 BasicCegarLoop]: trace histogram [111, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:00:53,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-04-06 21:00:53,214 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-04-06 21:00:53,215 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:00:53,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:00:53,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1109400062, now seen corresponding path program 211 times [2022-04-06 21:00:53,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:53,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449655292] [2022-04-06 21:00:53,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:53,265 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:00:53,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:00:53,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1109400062, now seen corresponding path program 212 times [2022-04-06 21:00:53,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:00:53,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260677089] [2022-04-06 21:00:53,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:00:53,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:00:53,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:58,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:00:58,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:58,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-04-06 21:00:58,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:00:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 3 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:00:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:00:58,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260677089] [2022-04-06 21:00:58,007 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260677089] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:00:58,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335876302] [2022-04-06 21:00:58,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:00:58,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:00:58,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:00:58,009 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:00:58,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-04-06 21:00:58,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:00:58,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:00:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 21:00:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:00:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2022-04-06 21:00:58,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:00:59,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6219 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 6216 trivial. 0 not checked. [2022-04-06 21:00:59,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335876302] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:00:59,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 21:00:59,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 4, 7] total 122 [2022-04-06 21:00:59,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:00:59,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449655292] [2022-04-06 21:00:59,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449655292] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:00:59,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:00:59,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-04-06 21:00:59,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105126916] [2022-04-06 21:00:59,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:00:59,363 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-04-06 21:00:59,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:00:59,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-04-06 21:00:59,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=14404, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 21:00:59,364 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand has 115 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 114 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:01:08,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:01:08,901 INFO L93 Difference]: Finished difference Result 269 states and 276 transitions. [2022-04-06 21:01:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-04-06 21:01:08,901 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 114 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 131 [2022-04-06 21:01:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:01:08,902 INFO L225 Difference]: With dead ends: 269 [2022-04-06 21:01:08,902 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 21:01:08,904 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6225 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=1028, Invalid=53494, Unknown=0, NotChecked=0, Total=54522 [2022-04-06 21:01:08,904 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 17 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 14308 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 14537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 14308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:01:08,904 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 573 Invalid, 14537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 14308 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 21:01:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 21:01:08,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-04-06 21:01:08,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 129 states have (on average 1.0310077519379846) internal successors, (133), 130 states have internal predecessors, (133), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 21:01:08,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 141 transitions. [2022-04-06 21:01:08,924 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 141 transitions. Word has length 131 [2022-04-06 21:01:08,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:01:08,924 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 141 transitions. [2022-04-06 21:01:08,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 114 states have internal predecessors, (125), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 21:01:08,924 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 141 transitions. [2022-04-06 21:01:08,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 21:01:08,925 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:01:08,925 INFO L499 BasicCegarLoop]: trace histogram [112, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:01:08,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-04-06 21:01:09,130 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-04-06 21:01:09,130 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:01:09,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:01:09,131 INFO L85 PathProgramCache]: Analyzing trace with hash 920619042, now seen corresponding path program 213 times [2022-04-06 21:01:09,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:01:09,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149785954] [2022-04-06 21:01:09,140 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:09,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:01:09,186 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:01:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash 920619042, now seen corresponding path program 214 times [2022-04-06 21:01:09,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:01:09,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862511806] [2022-04-06 21:01:09,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:01:09,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:01:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat