/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/loop-acceleration/phases_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 19:47:58,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 19:47:58,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 19:47:58,129 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 19:47:58,166 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 19:47:58,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 19:47:58,167 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 19:47:58,168 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 19:47:58,176 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 19:47:58,177 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 19:47:58,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 19:47:58,177 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 19:47:58,177 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 19:47:58,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 19:47:58,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 19:47:58,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 19:47:58,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 19:47:58,178 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 19:47:58,178 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 19:47:58,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:47:58,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 19:47:58,179 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 19:47:58,180 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 19:47:58,348 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 19:47:58,375 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 19:47:58,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 19:47:58,377 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 19:47:58,378 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 19:47:58,379 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2022-04-06 19:47:58,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e21942e3/8c08093fcc6a4ef28fd89cad7a79cb86/FLAG7d794599c [2022-04-06 19:47:58,718 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 19:47:58,719 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c [2022-04-06 19:47:58,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e21942e3/8c08093fcc6a4ef28fd89cad7a79cb86/FLAG7d794599c [2022-04-06 19:47:59,155 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e21942e3/8c08093fcc6a4ef28fd89cad7a79cb86 [2022-04-06 19:47:59,157 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 19:47:59,158 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 19:47:59,159 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 19:47:59,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 19:47:59,161 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 19:47:59,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,162 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30cbc637 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59, skipping insertion in model container [2022-04-06 19:47:59,162 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 19:47:59,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 19:47:59,286 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c[322,335] [2022-04-06 19:47:59,314 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:47:59,321 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 19:47:59,329 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/phases_1-2.c[322,335] [2022-04-06 19:47:59,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 19:47:59,343 INFO L208 MainTranslator]: Completed translation [2022-04-06 19:47:59,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59 WrapperNode [2022-04-06 19:47:59,344 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 19:47:59,345 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 19:47:59,345 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 19:47:59,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 19:47:59,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,359 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,359 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,370 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,371 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,374 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 19:47:59,375 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 19:47:59,375 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 19:47:59,375 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 19:47:59,376 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (1/1) ... [2022-04-06 19:47:59,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 19:47:59,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:47:59,415 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 19:47:59,416 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 19:47:59,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 19:47:59,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 19:47:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 19:47:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 19:47:59,463 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 19:47:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 19:47:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 19:47:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 19:47:59,463 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 19:47:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 19:47:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 19:47:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 19:47:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 19:47:59,464 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 19:47:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 19:47:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 19:47:59,465 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 19:47:59,510 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 19:47:59,511 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 19:47:59,584 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 19:47:59,587 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 19:47:59,588 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 19:47:59,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:47:59 BoogieIcfgContainer [2022-04-06 19:47:59,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 19:47:59,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 19:47:59,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 19:47:59,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 19:47:59,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 07:47:59" (1/3) ... [2022-04-06 19:47:59,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ee7e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:47:59, skipping insertion in model container [2022-04-06 19:47:59,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 07:47:59" (2/3) ... [2022-04-06 19:47:59,593 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36ee7e85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 07:47:59, skipping insertion in model container [2022-04-06 19:47:59,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 07:47:59" (3/3) ... [2022-04-06 19:47:59,594 INFO L111 eAbstractionObserver]: Analyzing ICFG phases_1-2.c [2022-04-06 19:47:59,597 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 19:47:59,597 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 19:47:59,624 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 19:47:59,629 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 19:47:59,629 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 19:47:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-04-06 19:47:59,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:47:59,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:59,645 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:59,646 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:59,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:59,649 INFO L85 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 1 times [2022-04-06 19:47:59,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:59,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1185826299] [2022-04-06 19:47:59,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:47:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash 491760044, now seen corresponding path program 2 times [2022-04-06 19:47:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:59,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620124262] [2022-04-06 19:47:59,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:59,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:59,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:59,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:59,761 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 19:47:59,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:59,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620124262] [2022-04-06 19:47:59,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620124262] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:59,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:59,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:47:59,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:59,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1185826299] [2022-04-06 19:47:59,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1185826299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:59,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:59,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:47:59,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288848591] [2022-04-06 19:47:59,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:59,769 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:47:59,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:59,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:47:59,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 19:47:59,788 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:59,813 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-04-06 19:47:59,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:47:59,815 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 19:47:59,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:59,819 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:47:59,819 INFO L226 Difference]: Without dead ends: 13 [2022-04-06 19:47:59,821 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 19:47:59,823 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:59,824 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-04-06 19:47:59,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-04-06 19:47:59,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:59,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-04-06 19:47:59,845 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-04-06 19:47:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:59,845 INFO L478 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-04-06 19:47:59,845 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 19:47:59,845 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-04-06 19:47:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 19:47:59,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:59,846 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:59,846 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 19:47:59,846 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 1 times [2022-04-06 19:47:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:59,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787918580] [2022-04-06 19:47:59,848 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 19:47:59,848 INFO L85 PathProgramCache]: Analyzing trace with hash 482524834, now seen corresponding path program 2 times [2022-04-06 19:47:59,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:59,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349884355] [2022-04-06 19:47:59,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:59,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:59,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:59,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:47:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:47:59,918 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 19:47:59,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:47:59,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349884355] [2022-04-06 19:47:59,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349884355] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:59,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:59,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:47:59,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:47:59,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787918580] [2022-04-06 19:47:59,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787918580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:47:59,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:47:59,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 19:47:59,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116135780] [2022-04-06 19:47:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:47:59,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 19:47:59,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:59,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 19:47:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 19:47:59,921 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:59,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:47:59,958 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2022-04-06 19:47:59,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 19:47:59,959 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 19:47:59,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:47:59,959 INFO L225 Difference]: With dead ends: 22 [2022-04-06 19:47:59,959 INFO L226 Difference]: Without dead ends: 15 [2022-04-06 19:47:59,960 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 19:47:59,961 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:47:59,962 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:47:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-04-06 19:47:59,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-04-06 19:47:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:47:59,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-04-06 19:47:59,968 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-04-06 19:47:59,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:47:59,968 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-04-06 19:47:59,968 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 19:47:59,968 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-04-06 19:47:59,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 19:47:59,969 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:47:59,969 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:47:59,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 19:47:59,969 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:47:59,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:47:59,970 INFO L85 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 1 times [2022-04-06 19:47:59,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:47:59,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [849612081] [2022-04-06 19:47:59,983 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:47:59,983 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:47:59,983 INFO L85 PathProgramCache]: Analyzing trace with hash 925229631, now seen corresponding path program 2 times [2022-04-06 19:47:59,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:47:59,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541718652] [2022-04-06 19:47:59,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:47:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:47:59,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:00,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:00,092 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 19:48:00,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:00,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541718652] [2022-04-06 19:48:00,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541718652] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:00,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269953366] [2022-04-06 19:48:00,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:00,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:00,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:00,101 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 19:48:00,103 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 19:48:00,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:00,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:00,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 19:48:00,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:00,180 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 19:48:00,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:00,237 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 19:48:00,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269953366] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:00,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:00,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 19:48:00,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:00,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [849612081] [2022-04-06 19:48:00,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [849612081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:00,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:00,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 19:48:00,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228338572] [2022-04-06 19:48:00,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:00,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 19:48:00,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 19:48:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:48:00,240 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:00,323 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-04-06 19:48:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 19:48:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 19:48:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:00,324 INFO L225 Difference]: With dead ends: 24 [2022-04-06 19:48:00,324 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 19:48:00,324 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-04-06 19:48:00,326 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:00,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 24 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:00,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 19:48:00,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-04-06 19:48:00,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:00,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2022-04-06 19:48:00,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2022-04-06 19:48:00,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:00,330 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2022-04-06 19:48:00,330 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:00,330 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2022-04-06 19:48:00,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-04-06 19:48:00,331 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:00,331 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:00,350 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 19:48:00,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:00,547 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:00,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:00,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1162777244, now seen corresponding path program 3 times [2022-04-06 19:48:00,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:00,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [8258038] [2022-04-06 19:48:00,551 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:00,551 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1162777244, now seen corresponding path program 4 times [2022-04-06 19:48:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793106806] [2022-04-06 19:48:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:00,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:00,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:00,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:00,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793106806] [2022-04-06 19:48:00,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793106806] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:00,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513028940] [2022-04-06 19:48:00,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:00,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:00,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:00,668 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 19:48:00,669 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 19:48:00,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:00,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:00,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 19:48:00,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:00,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:00,861 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 19:48:00,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513028940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:00,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:00,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 11 [2022-04-06 19:48:00,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:00,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [8258038] [2022-04-06 19:48:00,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [8258038] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:00,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:00,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 19:48:00,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610015838] [2022-04-06 19:48:00,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:00,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 19:48:00,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:00,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 19:48:00,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 19:48:00,863 INFO L87 Difference]: Start difference. First operand 17 states and 18 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 19:48:00,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:00,914 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-04-06 19:48:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 19:48:00,917 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 19:48:00,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:00,919 INFO L225 Difference]: With dead ends: 26 [2022-04-06 19:48:00,919 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 19:48:00,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:48:00,921 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:00,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:48:00,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 19:48:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-04-06 19:48:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:00,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 19:48:00,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2022-04-06 19:48:00,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:00,926 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 19:48:00,926 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 19:48:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 19:48:00,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 19:48:00,926 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:00,926 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:00,944 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 19:48:01,139 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,SelfDestructingSolverStorable3 [2022-04-06 19:48:01,140 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 1812766649, now seen corresponding path program 5 times [2022-04-06 19:48:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7277679] [2022-04-06 19:48:01,142 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:01,142 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1812766649, now seen corresponding path program 6 times [2022-04-06 19:48:01,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:01,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53766522] [2022-04-06 19:48:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:01,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:01,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:01,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53766522] [2022-04-06 19:48:01,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53766522] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:01,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014588163] [2022-04-06 19:48:01,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:01,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:01,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:01,233 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 19:48:01,234 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 19:48:01,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 19:48:01,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:01,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 19:48:01,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:01,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-04-06 19:48:01,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 19:48:01,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014588163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:01,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 19:48:01,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-04-06 19:48:01,296 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:01,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7277679] [2022-04-06 19:48:01,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7277679] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:01,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:01,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 19:48:01,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211544254] [2022-04-06 19:48:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:01,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 19:48:01,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 19:48:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:48:01,298 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 19:48:01,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:01,308 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-04-06 19:48:01,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 19:48:01,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 17 [2022-04-06 19:48:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:01,309 INFO L225 Difference]: With dead ends: 26 [2022-04-06 19:48:01,309 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 19:48:01,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-04-06 19:48:01,310 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:01,310 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 21 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:48:01,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 19:48:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2022-04-06 19:48:01,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:01,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-04-06 19:48:01,313 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2022-04-06 19:48:01,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:01,313 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-04-06 19:48:01,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 19:48:01,314 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-04-06 19:48:01,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 19:48:01,314 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:01,314 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:01,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:01,531 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:01,532 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:01,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:01,533 INFO L85 PathProgramCache]: Analyzing trace with hash -555382060, now seen corresponding path program 1 times [2022-04-06 19:48:01,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:01,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1950320489] [2022-04-06 19:48:01,534 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:01,534 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash -555382060, now seen corresponding path program 2 times [2022-04-06 19:48:01,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:01,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051644718] [2022-04-06 19:48:01,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:01,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:01,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:01,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:01,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051644718] [2022-04-06 19:48:01,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051644718] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:01,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789162952] [2022-04-06 19:48:01,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:01,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:01,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:01,597 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 19:48:01,598 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 19:48:01,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:01,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:01,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 19:48:01,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:01,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:01,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:01,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:01,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789162952] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:01,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:01,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2022-04-06 19:48:01,777 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:01,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1950320489] [2022-04-06 19:48:01,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1950320489] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:01,777 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:01,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 19:48:01,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436111003] [2022-04-06 19:48:01,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:01,778 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 19:48:01,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:01,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 19:48:01,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2022-04-06 19:48:01,778 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:01,840 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2022-04-06 19:48:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 19:48:01,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 19:48:01,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:01,841 INFO L225 Difference]: With dead ends: 30 [2022-04-06 19:48:01,841 INFO L226 Difference]: Without dead ends: 22 [2022-04-06 19:48:01,841 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:48:01,842 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 12 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:01,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 34 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:48:01,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-04-06 19:48:01,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-04-06 19:48:01,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:01,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 19:48:01,846 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2022-04-06 19:48:01,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:01,846 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 19:48:01,846 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:01,846 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 19:48:01,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-04-06 19:48:01,846 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:01,846 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:01,864 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 19:48:02,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:02,063 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:02,063 INFO L85 PathProgramCache]: Analyzing trace with hash 795722097, now seen corresponding path program 3 times [2022-04-06 19:48:02,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:02,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386080766] [2022-04-06 19:48:02,065 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:02,065 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:02,065 INFO L85 PathProgramCache]: Analyzing trace with hash 795722097, now seen corresponding path program 4 times [2022-04-06 19:48:02,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:02,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175551715] [2022-04-06 19:48:02,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:02,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:02,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:02,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:02,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:02,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175551715] [2022-04-06 19:48:02,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175551715] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:02,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235628155] [2022-04-06 19:48:02,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:02,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:02,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:02,149 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 19:48:02,153 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 19:48:02,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:02,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:02,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 19:48:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:02,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:02,350 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-04-06 19:48:02,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235628155] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:02,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:02,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 6] total 14 [2022-04-06 19:48:02,350 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:02,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386080766] [2022-04-06 19:48:02,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386080766] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:02,351 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:02,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 19:48:02,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91656023] [2022-04-06 19:48:02,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:02,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 19:48:02,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:02,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 19:48:02,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 19:48:02,352 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:02,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:02,431 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2022-04-06 19:48:02,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 19:48:02,431 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-04-06 19:48:02,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:02,432 INFO L225 Difference]: With dead ends: 32 [2022-04-06 19:48:02,432 INFO L226 Difference]: Without dead ends: 24 [2022-04-06 19:48:02,432 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:48:02,432 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:02,433 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 39 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:48:02,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-04-06 19:48:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-04-06 19:48:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:02,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 19:48:02,436 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 21 [2022-04-06 19:48:02,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:02,436 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 19:48:02,437 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 7 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:02,437 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 19:48:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 19:48:02,437 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:02,437 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:02,456 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 19:48:02,653 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:02,653 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:02,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:02,653 INFO L85 PathProgramCache]: Analyzing trace with hash 2126693582, now seen corresponding path program 5 times [2022-04-06 19:48:02,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:02,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [613661418] [2022-04-06 19:48:02,655 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:02,655 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:02,655 INFO L85 PathProgramCache]: Analyzing trace with hash 2126693582, now seen corresponding path program 6 times [2022-04-06 19:48:02,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:02,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704947894] [2022-04-06 19:48:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:02,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:02,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:02,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:02,734 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:02,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704947894] [2022-04-06 19:48:02,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704947894] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:02,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118934816] [2022-04-06 19:48:02,734 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:02,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:02,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:02,735 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 19:48:02,751 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 19:48:02,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:02,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:02,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:48:02,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:02,859 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:02,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:03,098 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:03,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118934816] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:03,098 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:03,098 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 12] total 20 [2022-04-06 19:48:03,099 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:03,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [613661418] [2022-04-06 19:48:03,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [613661418] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:03,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:03,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 19:48:03,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103635645] [2022-04-06 19:48:03,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:03,099 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 19:48:03,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:03,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 19:48:03,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:48:03,100 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:03,187 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-06 19:48:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 19:48:03,187 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-04-06 19:48:03,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:03,187 INFO L225 Difference]: With dead ends: 34 [2022-04-06 19:48:03,187 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 19:48:03,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:48:03,188 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:03,188 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 19 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 19:48:03,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 19:48:03,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-04-06 19:48:03,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-04-06 19:48:03,192 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2022-04-06 19:48:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:03,192 INFO L478 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-04-06 19:48:03,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-04-06 19:48:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 19:48:03,193 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:03,193 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:03,214 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 19:48:03,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:03,403 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:03,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1290036459, now seen corresponding path program 7 times [2022-04-06 19:48:03,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:03,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1243436169] [2022-04-06 19:48:03,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:03,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1290036459, now seen corresponding path program 8 times [2022-04-06 19:48:03,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:03,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043790030] [2022-04-06 19:48:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:03,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:03,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:03,514 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:03,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:03,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043790030] [2022-04-06 19:48:03,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043790030] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:03,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127923472] [2022-04-06 19:48:03,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:03,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:03,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:03,523 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 19:48:03,524 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 19:48:03,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:03,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:03,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:48:03,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:03,649 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:03,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-04-06 19:48:03,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127923472] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:03,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:03,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 6] total 16 [2022-04-06 19:48:03,725 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:03,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1243436169] [2022-04-06 19:48:03,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1243436169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:03,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:03,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 19:48:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107992296] [2022-04-06 19:48:03,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:03,725 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 19:48:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:03,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 19:48:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 19:48:03,726 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:03,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:03,852 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2022-04-06 19:48:03,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 19:48:03,852 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 19:48:03,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:03,853 INFO L225 Difference]: With dead ends: 36 [2022-04-06 19:48:03,853 INFO L226 Difference]: Without dead ends: 28 [2022-04-06 19:48:03,853 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:48:03,854 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:03,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:03,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-04-06 19:48:03,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-04-06 19:48:03,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:03,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-04-06 19:48:03,858 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 25 [2022-04-06 19:48:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:03,858 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-04-06 19:48:03,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 9 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:03,858 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-04-06 19:48:03,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 19:48:03,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:03,858 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:03,874 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 19:48:04,074 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:04,075 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:04,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:04,075 INFO L85 PathProgramCache]: Analyzing trace with hash 421425608, now seen corresponding path program 9 times [2022-04-06 19:48:04,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:04,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1171388999] [2022-04-06 19:48:04,077 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:04,077 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:04,077 INFO L85 PathProgramCache]: Analyzing trace with hash 421425608, now seen corresponding path program 10 times [2022-04-06 19:48:04,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:04,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202828196] [2022-04-06 19:48:04,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:04,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:04,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:04,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:04,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202828196] [2022-04-06 19:48:04,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202828196] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:04,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599959464] [2022-04-06 19:48:04,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:04,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:04,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:04,192 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 19:48:04,192 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 19:48:04,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:04,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:04,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 19:48:04,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:04,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:04,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599959464] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:04,480 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:04,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-04-06 19:48:04,480 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:04,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1171388999] [2022-04-06 19:48:04,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1171388999] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:04,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:04,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 19:48:04,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447722021] [2022-04-06 19:48:04,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:04,481 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 19:48:04,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 19:48:04,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:48:04,481 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:04,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:04,614 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2022-04-06 19:48:04,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 19:48:04,614 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 19:48:04,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:04,615 INFO L225 Difference]: With dead ends: 38 [2022-04-06 19:48:04,615 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 19:48:04,615 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2022-04-06 19:48:04,615 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:04,616 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 54 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:04,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 19:48:04,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 19:48:04,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:04,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-04-06 19:48:04,619 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 27 [2022-04-06 19:48:04,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:04,619 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-04-06 19:48:04,620 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:04,620 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-04-06 19:48:04,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 19:48:04,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:04,620 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:04,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 19:48:04,827 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,SelfDestructingSolverStorable9 [2022-04-06 19:48:04,827 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:04,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1089946779, now seen corresponding path program 11 times [2022-04-06 19:48:04,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:04,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094979312] [2022-04-06 19:48:04,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:04,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1089946779, now seen corresponding path program 12 times [2022-04-06 19:48:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:04,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533005517] [2022-04-06 19:48:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:04,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:04,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:04,972 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:04,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:04,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533005517] [2022-04-06 19:48:04,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533005517] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:04,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310978615] [2022-04-06 19:48:04,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:04,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:04,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:04,974 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 19:48:04,975 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 19:48:05,021 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:05,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:48:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 19:48:05,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:05,187 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 19:48:05,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310978615] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:05,187 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:05,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 4, 5] total 17 [2022-04-06 19:48:05,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:05,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094979312] [2022-04-06 19:48:05,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094979312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:05,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:05,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 19:48:05,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067735921] [2022-04-06 19:48:05,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:05,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 19:48:05,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:05,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 19:48:05,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-04-06 19:48:05,189 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:05,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:05,312 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-04-06 19:48:05,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 19:48:05,313 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-04-06 19:48:05,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:05,313 INFO L225 Difference]: With dead ends: 40 [2022-04-06 19:48:05,313 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 19:48:05,313 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=166, Invalid=484, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:48:05,314 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:05,314 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 19:48:05,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 19:48:05,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:05,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-04-06 19:48:05,318 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2022-04-06 19:48:05,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:05,318 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-04-06 19:48:05,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:05,318 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-04-06 19:48:05,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 19:48:05,319 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:05,319 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:05,324 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 19:48:05,525 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:05,525 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:05,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:05,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1819864638, now seen corresponding path program 13 times [2022-04-06 19:48:05,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:05,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [6555191] [2022-04-06 19:48:05,527 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:05,527 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:05,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1819864638, now seen corresponding path program 14 times [2022-04-06 19:48:05,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:05,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755903131] [2022-04-06 19:48:05,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:05,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:05,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:05,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755903131] [2022-04-06 19:48:05,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755903131] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:05,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003560992] [2022-04-06 19:48:05,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:05,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:05,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:05,635 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 19:48:05,652 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 19:48:05,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:05,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 19:48:05,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:05,781 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:05,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:06,031 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:06,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003560992] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:06,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:06,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 26 [2022-04-06 19:48:06,032 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:06,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [6555191] [2022-04-06 19:48:06,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [6555191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:06,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:06,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 19:48:06,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510300570] [2022-04-06 19:48:06,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:06,032 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 19:48:06,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:06,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 19:48:06,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:48:06,033 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:06,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:06,222 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2022-04-06 19:48:06,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 19:48:06,222 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 19:48:06,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:06,222 INFO L225 Difference]: With dead ends: 42 [2022-04-06 19:48:06,223 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 19:48:06,223 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 19:48:06,223 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:06,224 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 54 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:06,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 19:48:06,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 19:48:06,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-06 19:48:06,227 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 31 [2022-04-06 19:48:06,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:06,228 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-06 19:48:06,228 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:06,228 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-06 19:48:06,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 19:48:06,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:06,228 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:06,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-06 19:48:06,439 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,SelfDestructingSolverStorable11 [2022-04-06 19:48:06,439 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:06,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1103709407, now seen corresponding path program 15 times [2022-04-06 19:48:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:06,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1109854507] [2022-04-06 19:48:06,441 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:06,441 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:06,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1103709407, now seen corresponding path program 16 times [2022-04-06 19:48:06,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:06,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853180401] [2022-04-06 19:48:06,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:06,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:06,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853180401] [2022-04-06 19:48:06,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853180401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:06,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099227083] [2022-04-06 19:48:06,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:06,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:06,566 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 19:48:06,567 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 19:48:06,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:06,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:06,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 19:48:06,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:06,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:06,896 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-04-06 19:48:06,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099227083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:06,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:06,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 6] total 20 [2022-04-06 19:48:06,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:06,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1109854507] [2022-04-06 19:48:06,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1109854507] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:06,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:06,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 19:48:06,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205019672] [2022-04-06 19:48:06,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:06,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 19:48:06,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:06,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 19:48:06,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-04-06 19:48:06,898 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:07,110 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-04-06 19:48:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 19:48:07,111 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-04-06 19:48:07,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:07,111 INFO L225 Difference]: With dead ends: 44 [2022-04-06 19:48:07,111 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 19:48:07,112 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:48:07,112 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:07,112 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 54 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:07,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 19:48:07,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-04-06 19:48:07,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-04-06 19:48:07,116 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 33 [2022-04-06 19:48:07,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:07,116 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-04-06 19:48:07,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,116 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-04-06 19:48:07,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 19:48:07,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:07,117 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:07,133 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-04-06 19:48:07,325 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,SelfDestructingSolverStorable12 [2022-04-06 19:48:07,325 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:07,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:07,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1749755068, now seen corresponding path program 17 times [2022-04-06 19:48:07,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:07,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1313987703] [2022-04-06 19:48:07,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:07,327 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:07,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1749755068, now seen corresponding path program 18 times [2022-04-06 19:48:07,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:07,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930552653] [2022-04-06 19:48:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:07,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:07,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:07,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:07,471 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:07,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930552653] [2022-04-06 19:48:07,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930552653] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:07,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688003084] [2022-04-06 19:48:07,471 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:07,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:07,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:07,472 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 19:48:07,473 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 19:48:07,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:07,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:07,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:07,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:48:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:07,645 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 19:48:07,645 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688003084] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:07,645 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:07,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 4, 4] total 19 [2022-04-06 19:48:07,645 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:07,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1313987703] [2022-04-06 19:48:07,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1313987703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:07,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:07,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 19:48:07,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503633396] [2022-04-06 19:48:07,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:07,646 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 19:48:07,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:07,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 19:48:07,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-04-06 19:48:07,646 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:07,860 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-04-06 19:48:07,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 19:48:07,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-04-06 19:48:07,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:07,860 INFO L225 Difference]: With dead ends: 46 [2022-04-06 19:48:07,861 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 19:48:07,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:48:07,864 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:07,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 54 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 19:48:07,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-04-06 19:48:07,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-04-06 19:48:07,868 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2022-04-06 19:48:07,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:07,868 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-04-06 19:48:07,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-04-06 19:48:07,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 19:48:07,868 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:07,868 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:07,888 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 19:48:08,088 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,SelfDestructingSolverStorable13 [2022-04-06 19:48:08,088 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:08,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:08,089 INFO L85 PathProgramCache]: Analyzing trace with hash -170622631, now seen corresponding path program 19 times [2022-04-06 19:48:08,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:08,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [217944943] [2022-04-06 19:48:08,090 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:08,090 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:08,090 INFO L85 PathProgramCache]: Analyzing trace with hash -170622631, now seen corresponding path program 20 times [2022-04-06 19:48:08,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:08,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028643950] [2022-04-06 19:48:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:08,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:08,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:08,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028643950] [2022-04-06 19:48:08,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028643950] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:08,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844659517] [2022-04-06 19:48:08,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:08,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:08,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:08,261 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 19:48:08,262 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 19:48:08,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:08,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:08,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:48:08,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:08,466 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:08,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:08,579 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 19:48:08,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844659517] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:08,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:08,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 6] total 22 [2022-04-06 19:48:08,579 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:08,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [217944943] [2022-04-06 19:48:08,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [217944943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:08,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:08,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 19:48:08,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273919056] [2022-04-06 19:48:08,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:08,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 19:48:08,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:08,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 19:48:08,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-04-06 19:48:08,581 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:08,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:08,831 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2022-04-06 19:48:08,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 19:48:08,832 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 19:48:08,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:08,832 INFO L225 Difference]: With dead ends: 48 [2022-04-06 19:48:08,832 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 19:48:08,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=1034, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 19:48:08,833 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:08,833 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:08,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 19:48:08,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 19:48:08,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:08,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-04-06 19:48:08,838 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 37 [2022-04-06 19:48:08,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:08,838 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-04-06 19:48:08,838 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 15 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:08,838 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-04-06 19:48:08,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 19:48:08,839 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:08,839 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:08,855 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 19:48:09,055 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,SelfDestructingSolverStorable14 [2022-04-06 19:48:09,055 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:09,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:09,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1182345910, now seen corresponding path program 21 times [2022-04-06 19:48:09,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:09,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1480038729] [2022-04-06 19:48:09,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:09,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:09,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1182345910, now seen corresponding path program 22 times [2022-04-06 19:48:09,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:09,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621438478] [2022-04-06 19:48:09,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:09,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:09,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:09,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621438478] [2022-04-06 19:48:09,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621438478] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:09,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697010076] [2022-04-06 19:48:09,250 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:09,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:09,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:09,263 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 19:48:09,267 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 19:48:09,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:09,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:09,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 19:48:09,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:09,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:09,889 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:09,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697010076] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:09,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:09,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 34 [2022-04-06 19:48:09,889 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:09,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1480038729] [2022-04-06 19:48:09,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1480038729] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:09,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:09,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 19:48:09,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293392571] [2022-04-06 19:48:09,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:09,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 19:48:09,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:09,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 19:48:09,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:48:09,891 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:10,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:10,175 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-04-06 19:48:10,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 19:48:10,176 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-04-06 19:48:10,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:10,176 INFO L225 Difference]: With dead ends: 50 [2022-04-06 19:48:10,176 INFO L226 Difference]: Without dead ends: 42 [2022-04-06 19:48:10,177 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=611, Invalid=1645, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 19:48:10,177 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:10,177 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:10,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-04-06 19:48:10,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2022-04-06 19:48:10,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-04-06 19:48:10,181 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 39 [2022-04-06 19:48:10,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:10,181 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-04-06 19:48:10,181 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:10,181 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-04-06 19:48:10,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 19:48:10,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:10,182 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:10,199 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 19:48:10,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:10,385 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:10,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:10,385 INFO L85 PathProgramCache]: Analyzing trace with hash 10023123, now seen corresponding path program 23 times [2022-04-06 19:48:10,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:10,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [118763756] [2022-04-06 19:48:10,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:10,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:10,386 INFO L85 PathProgramCache]: Analyzing trace with hash 10023123, now seen corresponding path program 24 times [2022-04-06 19:48:10,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:10,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761435515] [2022-04-06 19:48:10,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:10,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:10,596 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:10,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:10,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761435515] [2022-04-06 19:48:10,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761435515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:10,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500493017] [2022-04-06 19:48:10,596 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:10,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:10,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:10,597 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 19:48:10,611 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 19:48:10,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:10,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:10,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:48:10,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:10,752 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 19:48:10,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:10,875 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 42 proven. 1 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2022-04-06 19:48:10,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500493017] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:10,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:10,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 4, 5] total 23 [2022-04-06 19:48:10,875 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:10,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [118763756] [2022-04-06 19:48:10,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [118763756] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:10,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:10,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 19:48:10,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832419499] [2022-04-06 19:48:10,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:10,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 19:48:10,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:10,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 19:48:10,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-04-06 19:48:10,876 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:11,184 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-04-06 19:48:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 19:48:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-04-06 19:48:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:11,185 INFO L225 Difference]: With dead ends: 52 [2022-04-06 19:48:11,185 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 19:48:11,185 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=268, Invalid=1138, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:48:11,186 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:11,186 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 54 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 19:48:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-04-06 19:48:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-04-06 19:48:11,190 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2022-04-06 19:48:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:11,190 INFO L478 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-04-06 19:48:11,190 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:11,190 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-04-06 19:48:11,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 19:48:11,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:11,190 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:11,200 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 19:48:11,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 19:48:11,400 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:11,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:11,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1310743632, now seen corresponding path program 25 times [2022-04-06 19:48:11,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:11,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [682545438] [2022-04-06 19:48:11,402 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:11,402 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1310743632, now seen corresponding path program 26 times [2022-04-06 19:48:11,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:11,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487785800] [2022-04-06 19:48:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:11,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:11,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:11,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487785800] [2022-04-06 19:48:11,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [487785800] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:11,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906226237] [2022-04-06 19:48:11,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:11,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:11,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:11,623 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 19:48:11,663 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 19:48:11,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:11,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:11,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 19:48:11,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:11,840 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:11,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:12,467 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:12,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906226237] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:12,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:12,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 19] total 37 [2022-04-06 19:48:12,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:12,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [682545438] [2022-04-06 19:48:12,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [682545438] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:12,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:12,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 19:48:12,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579849703] [2022-04-06 19:48:12,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:12,468 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 19:48:12,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:12,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 19:48:12,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 19:48:12,469 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:12,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:12,800 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2022-04-06 19:48:12,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 19:48:12,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 19:48:12,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:12,800 INFO L225 Difference]: With dead ends: 54 [2022-04-06 19:48:12,800 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 19:48:12,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=2013, Unknown=0, NotChecked=0, Total=2756 [2022-04-06 19:48:12,801 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:12,802 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 34 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:12,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 19:48:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 19:48:12,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:12,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-04-06 19:48:12,825 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 43 [2022-04-06 19:48:12,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:12,825 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-04-06 19:48:12,825 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:12,825 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-04-06 19:48:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-04-06 19:48:12,827 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:12,827 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:12,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-04-06 19:48:13,027 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 19:48:13,028 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:13,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:13,028 INFO L85 PathProgramCache]: Analyzing trace with hash 742724429, now seen corresponding path program 27 times [2022-04-06 19:48:13,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:13,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355557975] [2022-04-06 19:48:13,029 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:13,029 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:13,029 INFO L85 PathProgramCache]: Analyzing trace with hash 742724429, now seen corresponding path program 28 times [2022-04-06 19:48:13,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:13,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635467275] [2022-04-06 19:48:13,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:13,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:13,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:13,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:13,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635467275] [2022-04-06 19:48:13,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635467275] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:13,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003412003] [2022-04-06 19:48:13,262 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:13,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:13,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:13,266 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 19:48:13,268 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 19:48:13,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:13,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 19:48:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:13,479 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:13,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 152 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-04-06 19:48:13,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003412003] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:13,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:13,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22, 6] total 26 [2022-04-06 19:48:13,595 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:13,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355557975] [2022-04-06 19:48:13,595 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355557975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:13,595 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:13,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 19:48:13,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362386871] [2022-04-06 19:48:13,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:13,595 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 19:48:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:13,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 19:48:13,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-04-06 19:48:13,596 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:13,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:13,861 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-04-06 19:48:13,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 19:48:13,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-04-06 19:48:13,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:13,861 INFO L225 Difference]: With dead ends: 56 [2022-04-06 19:48:13,861 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 19:48:13,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=1606, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:48:13,863 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:13,863 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 54 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 19:48:13,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 19:48:13,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-04-06 19:48:13,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:13,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-04-06 19:48:13,867 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 45 [2022-04-06 19:48:13,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:13,868 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-04-06 19:48:13,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 19 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:13,868 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-04-06 19:48:13,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 19:48:13,870 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:13,870 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:13,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-04-06 19:48:14,076 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:14,076 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1559425110, now seen corresponding path program 29 times [2022-04-06 19:48:14,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:14,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [500706229] [2022-04-06 19:48:14,079 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:14,079 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:14,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1559425110, now seen corresponding path program 30 times [2022-04-06 19:48:14,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:14,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546895934] [2022-04-06 19:48:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:14,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:14,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:14,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546895934] [2022-04-06 19:48:14,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546895934] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:14,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906850573] [2022-04-06 19:48:14,314 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:14,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:14,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:14,319 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 19:48:14,322 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 19:48:14,364 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:14,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:14,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:14,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:14,452 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 19:48:14,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 51 proven. 1 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2022-04-06 19:48:14,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906850573] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:14,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:14,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 4, 4] total 25 [2022-04-06 19:48:14,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:14,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [500706229] [2022-04-06 19:48:14,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [500706229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:14,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:14,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 19:48:14,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523409291] [2022-04-06 19:48:14,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:14,540 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 19:48:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 19:48:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2022-04-06 19:48:14,540 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:14,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:14,931 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-04-06 19:48:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 19:48:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 19:48:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:14,932 INFO L225 Difference]: With dead ends: 58 [2022-04-06 19:48:14,932 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 19:48:14,932 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=1500, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:48:14,934 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:14,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:14,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 19:48:14,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-04-06 19:48:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-04-06 19:48:14,946 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 47 [2022-04-06 19:48:14,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:14,946 INFO L478 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-04-06 19:48:14,946 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 20 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-04-06 19:48:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 19:48:14,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:14,947 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:14,965 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 19:48:15,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:15,154 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:15,154 INFO L85 PathProgramCache]: Analyzing trace with hash -2016974649, now seen corresponding path program 31 times [2022-04-06 19:48:15,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:15,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1741341127] [2022-04-06 19:48:15,155 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:15,155 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:15,155 INFO L85 PathProgramCache]: Analyzing trace with hash -2016974649, now seen corresponding path program 32 times [2022-04-06 19:48:15,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:15,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882049207] [2022-04-06 19:48:15,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:15,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:15,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:15,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882049207] [2022-04-06 19:48:15,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882049207] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:15,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298042929] [2022-04-06 19:48:15,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:15,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:15,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:15,358 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 19:48:15,361 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 19:48:15,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:15,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 19:48:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:15,564 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:15,564 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:15,680 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 19:48:15,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298042929] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:15,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:15,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 6] total 28 [2022-04-06 19:48:15,681 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:15,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1741341127] [2022-04-06 19:48:15,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1741341127] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:15,681 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:15,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 19:48:15,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758326386] [2022-04-06 19:48:15,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:15,681 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 19:48:15,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 19:48:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:48:15,682 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:16,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:16,050 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2022-04-06 19:48:16,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 19:48:16,050 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 19:48:16,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:16,051 INFO L225 Difference]: With dead ends: 60 [2022-04-06 19:48:16,051 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 19:48:16,052 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 92 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:48:16,053 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:16,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 99 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:16,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 19:48:16,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 19:48:16,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:16,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-04-06 19:48:16,066 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 49 [2022-04-06 19:48:16,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:16,066 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-04-06 19:48:16,067 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:16,067 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-04-06 19:48:16,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 19:48:16,067 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:16,067 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:16,084 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 19:48:16,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:16,277 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:16,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:16,277 INFO L85 PathProgramCache]: Analyzing trace with hash 659549860, now seen corresponding path program 33 times [2022-04-06 19:48:16,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:16,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [19052242] [2022-04-06 19:48:16,278 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:16,278 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash 659549860, now seen corresponding path program 34 times [2022-04-06 19:48:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:16,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79644054] [2022-04-06 19:48:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:16,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:16,478 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:16,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79644054] [2022-04-06 19:48:16,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79644054] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:16,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844342593] [2022-04-06 19:48:16,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:16,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:16,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:16,480 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 19:48:16,493 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 19:48:16,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:16,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:16,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 19:48:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:16,698 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:16,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:17,629 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:17,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844342593] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:17,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:17,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 23] total 45 [2022-04-06 19:48:17,630 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:17,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [19052242] [2022-04-06 19:48:17,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [19052242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:17,630 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:17,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 19:48:17,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579028084] [2022-04-06 19:48:17,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:17,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 19:48:17,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:17,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 19:48:17,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1431, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 19:48:17,631 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:18,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:18,109 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-04-06 19:48:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 19:48:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-04-06 19:48:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:18,110 INFO L225 Difference]: With dead ends: 62 [2022-04-06 19:48:18,110 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 19:48:18,111 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:48:18,111 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:18,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 34 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:18,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 19:48:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 19:48:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-04-06 19:48:18,115 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 51 [2022-04-06 19:48:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:18,116 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-04-06 19:48:18,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:18,116 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-04-06 19:48:18,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 19:48:18,116 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:18,116 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:18,135 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 19:48:18,327 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,SelfDestructingSolverStorable21 [2022-04-06 19:48:18,327 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:18,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:18,328 INFO L85 PathProgramCache]: Analyzing trace with hash 114192705, now seen corresponding path program 35 times [2022-04-06 19:48:18,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:18,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2016404806] [2022-04-06 19:48:18,329 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:18,329 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:18,329 INFO L85 PathProgramCache]: Analyzing trace with hash 114192705, now seen corresponding path program 36 times [2022-04-06 19:48:18,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:18,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789336258] [2022-04-06 19:48:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:18,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:18,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:18,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:18,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:18,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:18,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789336258] [2022-04-06 19:48:18,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789336258] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:18,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747757692] [2022-04-06 19:48:18,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:18,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:18,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:18,642 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 19:48:18,643 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 19:48:18,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:18,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:18,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 19:48:18,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 60 proven. 1 refuted. 0 times theorem prover too weak. 380 trivial. 0 not checked. [2022-04-06 19:48:18,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747757692] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:18,880 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:18,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 4, 4] total 28 [2022-04-06 19:48:18,880 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:18,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2016404806] [2022-04-06 19:48:18,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2016404806] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:18,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:18,880 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 19:48:18,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763518379] [2022-04-06 19:48:18,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:18,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 19:48:18,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:18,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 19:48:18,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=601, Unknown=0, NotChecked=0, Total=756 [2022-04-06 19:48:18,881 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:19,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:19,325 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-04-06 19:48:19,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 19:48:19,325 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-04-06 19:48:19,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:19,326 INFO L225 Difference]: With dead ends: 64 [2022-04-06 19:48:19,326 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 19:48:19,329 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=357, Invalid=1995, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:48:19,330 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:19,330 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 19:48:19,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-04-06 19:48:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-04-06 19:48:19,334 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2022-04-06 19:48:19,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:19,334 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-04-06 19:48:19,334 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:19,334 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-04-06 19:48:19,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 19:48:19,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:19,334 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:19,355 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 19:48:19,554 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,SelfDestructingSolverStorable22 [2022-04-06 19:48:19,554 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:19,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:19,555 INFO L85 PathProgramCache]: Analyzing trace with hash 11976862, now seen corresponding path program 37 times [2022-04-06 19:48:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:19,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [138979342] [2022-04-06 19:48:19,556 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:19,556 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:19,556 INFO L85 PathProgramCache]: Analyzing trace with hash 11976862, now seen corresponding path program 38 times [2022-04-06 19:48:19,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:19,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831696769] [2022-04-06 19:48:19,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:19,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:19,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:19,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:19,864 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:19,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831696769] [2022-04-06 19:48:19,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831696769] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:19,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237684840] [2022-04-06 19:48:19,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:19,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:19,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:19,865 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 19:48:19,866 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 19:48:19,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:19,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:19,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 19:48:19,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:20,101 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:20,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:20,761 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:20,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237684840] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:20,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:20,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 50 [2022-04-06 19:48:20,761 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:20,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [138979342] [2022-04-06 19:48:20,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [138979342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:20,761 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:20,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 19:48:20,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742113296] [2022-04-06 19:48:20,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:20,761 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 19:48:20,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:20,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 19:48:20,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=671, Invalid=1779, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:48:20,762 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:21,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:21,173 INFO L93 Difference]: Finished difference Result 66 states and 69 transitions. [2022-04-06 19:48:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 19:48:21,173 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 19:48:21,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:21,174 INFO L225 Difference]: With dead ends: 66 [2022-04-06 19:48:21,174 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 19:48:21,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1307, Invalid=3805, Unknown=0, NotChecked=0, Total=5112 [2022-04-06 19:48:21,175 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:21,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 29 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:21,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 19:48:21,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 19:48:21,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-04-06 19:48:21,180 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 55 [2022-04-06 19:48:21,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:21,180 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-04-06 19:48:21,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:21,180 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-04-06 19:48:21,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 19:48:21,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:21,180 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:21,197 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 19:48:21,395 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:21,396 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:21,399 INFO L85 PathProgramCache]: Analyzing trace with hash 566799547, now seen corresponding path program 39 times [2022-04-06 19:48:21,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:21,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [70594307] [2022-04-06 19:48:21,400 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:21,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:21,401 INFO L85 PathProgramCache]: Analyzing trace with hash 566799547, now seen corresponding path program 40 times [2022-04-06 19:48:21,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:21,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293815684] [2022-04-06 19:48:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:21,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:21,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:21,744 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:21,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293815684] [2022-04-06 19:48:21,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293815684] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:21,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023712443] [2022-04-06 19:48:21,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:21,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:21,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:21,745 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 19:48:21,746 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 19:48:21,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:21,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:21,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 19:48:21,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:22,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:22,174 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 254 trivial. 0 not checked. [2022-04-06 19:48:22,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023712443] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:22,174 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:22,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28, 6] total 32 [2022-04-06 19:48:22,174 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:22,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [70594307] [2022-04-06 19:48:22,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [70594307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:22,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:22,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 19:48:22,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443958925] [2022-04-06 19:48:22,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:22,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 19:48:22,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:22,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 19:48:22,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=884, Unknown=0, NotChecked=0, Total=992 [2022-04-06 19:48:22,186 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:22,607 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-04-06 19:48:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 19:48:22,607 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-04-06 19:48:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:22,608 INFO L225 Difference]: With dead ends: 68 [2022-04-06 19:48:22,608 INFO L226 Difference]: Without dead ends: 60 [2022-04-06 19:48:22,609 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=266, Invalid=2704, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:48:22,609 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:22,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 94 Invalid, 1136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 19:48:22,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-04-06 19:48:22,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-04-06 19:48:22,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:22,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-04-06 19:48:22,614 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 57 [2022-04-06 19:48:22,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:22,614 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-04-06 19:48:22,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 25 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:22,614 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-04-06 19:48:22,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 19:48:22,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:22,614 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:22,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:22,821 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:22,821 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:22,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:22,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1175455128, now seen corresponding path program 41 times [2022-04-06 19:48:22,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:22,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1050831585] [2022-04-06 19:48:22,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:22,823 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:22,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1175455128, now seen corresponding path program 42 times [2022-04-06 19:48:22,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:22,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53729621] [2022-04-06 19:48:22,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:22,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:23,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:23,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:23,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53729621] [2022-04-06 19:48:23,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53729621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:23,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264746858] [2022-04-06 19:48:23,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:23,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:23,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:23,186 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 19:48:23,203 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 19:48:23,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:23,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:23,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:23,349 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 19:48:23,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 69 proven. 1 refuted. 0 times theorem prover too weak. 506 trivial. 0 not checked. [2022-04-06 19:48:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264746858] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:23,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:23,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 4, 4] total 31 [2022-04-06 19:48:23,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:23,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1050831585] [2022-04-06 19:48:23,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1050831585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:23,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:23,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 19:48:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779372621] [2022-04-06 19:48:23,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:23,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 19:48:23,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:23,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 19:48:23,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2022-04-06 19:48:23,453 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:24,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:24,112 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-04-06 19:48:24,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 19:48:24,112 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-04-06 19:48:24,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:24,113 INFO L225 Difference]: With dead ends: 70 [2022-04-06 19:48:24,113 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 19:48:24,113 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=2562, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:48:24,114 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 32 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:24,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 74 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:48:24,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 19:48:24,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-04-06 19:48:24,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:24,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-04-06 19:48:24,118 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 59 [2022-04-06 19:48:24,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:24,118 INFO L478 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-04-06 19:48:24,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:24,118 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-04-06 19:48:24,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 19:48:24,118 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:24,118 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:24,125 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 19:48:24,319 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,SelfDestructingSolverStorable25 [2022-04-06 19:48:24,319 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:24,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:24,319 INFO L85 PathProgramCache]: Analyzing trace with hash 1977916213, now seen corresponding path program 43 times [2022-04-06 19:48:24,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:24,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1650007927] [2022-04-06 19:48:24,321 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:24,321 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:24,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1977916213, now seen corresponding path program 44 times [2022-04-06 19:48:24,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:24,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195432993] [2022-04-06 19:48:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:24,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:24,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:24,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:24,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195432993] [2022-04-06 19:48:24,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195432993] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:24,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162426773] [2022-04-06 19:48:24,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:24,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:24,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:24,674 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 19:48:24,675 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 19:48:24,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:24,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:24,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 19:48:24,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:24,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:25,093 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 19:48:25,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162426773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:25,093 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:25,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 30, 6] total 34 [2022-04-06 19:48:25,094 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:25,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1650007927] [2022-04-06 19:48:25,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1650007927] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:25,094 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:25,094 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 19:48:25,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969484264] [2022-04-06 19:48:25,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:25,094 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 19:48:25,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:25,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 19:48:25,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1006, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:48:25,095 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:25,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:25,624 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2022-04-06 19:48:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 19:48:25,624 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 19:48:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:25,624 INFO L225 Difference]: With dead ends: 72 [2022-04-06 19:48:25,624 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 19:48:25,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=3134, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 19:48:25,626 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:25,626 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 44 Invalid, 1266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:48:25,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 19:48:25,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 19:48:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:25,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-04-06 19:48:25,630 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 61 [2022-04-06 19:48:25,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:25,630 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-04-06 19:48:25,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:25,630 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-04-06 19:48:25,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 19:48:25,630 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:25,630 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:25,646 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:25,846 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,SelfDestructingSolverStorable26 [2022-04-06 19:48:25,846 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:25,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:25,847 INFO L85 PathProgramCache]: Analyzing trace with hash 48905618, now seen corresponding path program 45 times [2022-04-06 19:48:25,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:25,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1005371858] [2022-04-06 19:48:25,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:25,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:25,848 INFO L85 PathProgramCache]: Analyzing trace with hash 48905618, now seen corresponding path program 46 times [2022-04-06 19:48:25,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:25,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120397036] [2022-04-06 19:48:25,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:25,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:26,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:26,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120397036] [2022-04-06 19:48:26,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120397036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:26,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078761073] [2022-04-06 19:48:26,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:26,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:26,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:26,271 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 19:48:26,272 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 19:48:26,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:26,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:26,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 19:48:26,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:26,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:27,893 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:27,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078761073] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:27,893 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:27,893 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 29] total 57 [2022-04-06 19:48:27,893 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:27,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1005371858] [2022-04-06 19:48:27,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1005371858] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:27,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:27,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 19:48:27,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332053556] [2022-04-06 19:48:27,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:27,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 19:48:27,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:27,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 19:48:27,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=867, Invalid=2325, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 19:48:27,895 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:28,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:28,435 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-04-06 19:48:28,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 19:48:28,435 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-04-06 19:48:28,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:28,435 INFO L225 Difference]: With dead ends: 74 [2022-04-06 19:48:28,435 INFO L226 Difference]: Without dead ends: 66 [2022-04-06 19:48:28,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1723, Invalid=5083, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:48:28,437 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 34 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:28,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 94 Invalid, 1427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:48:28,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-04-06 19:48:28,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2022-04-06 19:48:28,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-04-06 19:48:28,442 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 63 [2022-04-06 19:48:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:28,442 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-04-06 19:48:28,442 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-04-06 19:48:28,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 19:48:28,442 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:28,442 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:28,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:28,643 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 19:48:28,643 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:28,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:28,644 INFO L85 PathProgramCache]: Analyzing trace with hash 1695595695, now seen corresponding path program 47 times [2022-04-06 19:48:28,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:28,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [609647831] [2022-04-06 19:48:28,645 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:28,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:28,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1695595695, now seen corresponding path program 48 times [2022-04-06 19:48:28,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:28,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142488741] [2022-04-06 19:48:28,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:28,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:29,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:29,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:29,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142488741] [2022-04-06 19:48:29,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142488741] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:29,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321340462] [2022-04-06 19:48:29,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:29,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:29,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:29,059 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 19:48:29,085 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 19:48:29,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:29,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:29,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:29,218 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 19:48:29,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:29,321 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 78 proven. 1 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-04-06 19:48:29,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321340462] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:29,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:29,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 4, 4] total 34 [2022-04-06 19:48:29,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:29,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [609647831] [2022-04-06 19:48:29,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [609647831] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:29,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:29,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 19:48:29,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176647123] [2022-04-06 19:48:29,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:29,322 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 19:48:29,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:29,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 19:48:29,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=925, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 19:48:29,323 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:30,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:30,115 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-04-06 19:48:30,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 19:48:30,115 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-04-06 19:48:30,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:30,115 INFO L225 Difference]: With dead ends: 76 [2022-04-06 19:48:30,115 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 19:48:30,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=3201, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:48:30,117 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1393 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:30,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1393 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:48:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 19:48:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-04-06 19:48:30,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.0317460317460319) internal successors, (65), 63 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-04-06 19:48:30,125 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2022-04-06 19:48:30,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:30,125 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-04-06 19:48:30,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 29 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-04-06 19:48:30,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 19:48:30,126 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:30,126 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:30,141 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 19:48:30,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 19:48:30,339 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:30,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:30,340 INFO L85 PathProgramCache]: Analyzing trace with hash -678172532, now seen corresponding path program 49 times [2022-04-06 19:48:30,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:30,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2101065731] [2022-04-06 19:48:30,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:30,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:30,342 INFO L85 PathProgramCache]: Analyzing trace with hash -678172532, now seen corresponding path program 50 times [2022-04-06 19:48:30,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:30,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946214180] [2022-04-06 19:48:30,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:30,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:30,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:30,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946214180] [2022-04-06 19:48:30,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946214180] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:30,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302449177] [2022-04-06 19:48:30,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:30,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:30,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:30,672 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 19:48:30,683 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 19:48:30,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:30,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 19:48:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:30,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:32,291 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:32,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302449177] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:32,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:32,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 31] total 61 [2022-04-06 19:48:32,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:32,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2101065731] [2022-04-06 19:48:32,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2101065731] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:32,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:32,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 19:48:32,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741861723] [2022-04-06 19:48:32,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:32,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 19:48:32,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:32,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 19:48:32,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=989, Invalid=2671, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 19:48:32,293 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:32,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:32,912 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2022-04-06 19:48:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 19:48:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 19:48:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:32,913 INFO L225 Difference]: With dead ends: 78 [2022-04-06 19:48:32,913 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 19:48:32,913 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1967, Invalid=5865, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 19:48:32,914 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1620 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:32,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 124 Invalid, 1677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1620 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:48:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 19:48:32,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 19:48:32,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:32,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-04-06 19:48:32,921 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 67 [2022-04-06 19:48:32,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:32,921 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-04-06 19:48:32,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 30 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:32,921 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-04-06 19:48:32,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 19:48:32,942 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:32,942 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:32,958 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 19:48:33,157 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:33,158 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:33,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:33,158 INFO L85 PathProgramCache]: Analyzing trace with hash -1241804503, now seen corresponding path program 51 times [2022-04-06 19:48:33,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:33,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1577413920] [2022-04-06 19:48:33,159 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:33,159 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:33,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1241804503, now seen corresponding path program 52 times [2022-04-06 19:48:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:33,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028773591] [2022-04-06 19:48:33,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:33,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:33,505 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:33,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028773591] [2022-04-06 19:48:33,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028773591] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:33,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074772564] [2022-04-06 19:48:33,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:33,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:33,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:33,506 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 19:48:33,516 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 19:48:33,547 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:33,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:33,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 19:48:33,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:33,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 434 refuted. 0 times theorem prover too weak. 407 trivial. 0 not checked. [2022-04-06 19:48:33,968 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074772564] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:33,969 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:33,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 34, 6] total 38 [2022-04-06 19:48:33,969 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:33,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1577413920] [2022-04-06 19:48:33,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1577413920] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:33,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:33,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 19:48:33,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625939016] [2022-04-06 19:48:33,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:33,969 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 19:48:33,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:33,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 19:48:33,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 19:48:33,970 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:34,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:34,639 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-04-06 19:48:34,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 19:48:34,640 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-04-06 19:48:34,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:34,640 INFO L225 Difference]: With dead ends: 80 [2022-04-06 19:48:34,640 INFO L226 Difference]: Without dead ends: 72 [2022-04-06 19:48:34,641 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 132 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=332, Invalid=4090, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 19:48:34,641 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 1773 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 1832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:34,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 159 Invalid, 1832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1773 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 19:48:34,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-04-06 19:48:34,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-04-06 19:48:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:34,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-04-06 19:48:34,646 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 69 [2022-04-06 19:48:34,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:34,646 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-04-06 19:48:34,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 31 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:34,646 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-04-06 19:48:34,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 19:48:34,646 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:34,646 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:34,663 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 19:48:34,847 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:34,847 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:34,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:34,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1726249338, now seen corresponding path program 53 times [2022-04-06 19:48:34,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:34,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919297001] [2022-04-06 19:48:34,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:34,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:34,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1726249338, now seen corresponding path program 54 times [2022-04-06 19:48:34,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:34,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490202634] [2022-04-06 19:48:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:34,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:35,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:35,211 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:35,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490202634] [2022-04-06 19:48:35,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490202634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:35,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647003867] [2022-04-06 19:48:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:35,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:35,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:35,220 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 19:48:35,221 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 19:48:35,275 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:35,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:35,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:48:35,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:35,370 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 19:48:35,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:35,589 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 87 proven. 1 refuted. 0 times theorem prover too weak. 812 trivial. 0 not checked. [2022-04-06 19:48:35,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647003867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:35,589 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:35,589 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 4, 8] total 41 [2022-04-06 19:48:35,589 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:35,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919297001] [2022-04-06 19:48:35,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919297001] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:35,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:35,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 19:48:35,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209217824] [2022-04-06 19:48:35,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:35,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 19:48:35,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 19:48:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=1389, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:48:35,591 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:36,421 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-04-06 19:48:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 19:48:36,421 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-04-06 19:48:36,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:36,422 INFO L225 Difference]: With dead ends: 82 [2022-04-06 19:48:36,422 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 19:48:36,422 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=4408, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:48:36,423 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1828 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:36,423 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 109 Invalid, 1889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1828 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:48:36,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 19:48:36,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 19:48:36,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:36,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-04-06 19:48:36,429 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 71 [2022-04-06 19:48:36,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:36,429 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-04-06 19:48:36,429 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 32 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:36,429 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-04-06 19:48:36,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 19:48:36,429 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:36,429 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:36,437 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 19:48:36,633 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,SelfDestructingSolverStorable31 [2022-04-06 19:48:36,633 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:36,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:36,633 INFO L85 PathProgramCache]: Analyzing trace with hash 873699491, now seen corresponding path program 55 times [2022-04-06 19:48:36,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:36,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1878431364] [2022-04-06 19:48:36,635 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:36,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash 873699491, now seen corresponding path program 56 times [2022-04-06 19:48:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:36,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884839754] [2022-04-06 19:48:36,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:37,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:37,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884839754] [2022-04-06 19:48:37,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884839754] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:37,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080202436] [2022-04-06 19:48:37,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:37,158 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 19:48:37,159 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 19:48:37,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:37,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:37,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 19:48:37,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:37,506 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:37,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 466 trivial. 0 not checked. [2022-04-06 19:48:37,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080202436] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:37,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:37,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36, 6] total 40 [2022-04-06 19:48:37,688 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:37,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1878431364] [2022-04-06 19:48:37,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1878431364] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:37,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:37,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 19:48:37,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936082509] [2022-04-06 19:48:37,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:37,688 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 19:48:37,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:37,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 19:48:37,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1420, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 19:48:37,689 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:38,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:38,809 INFO L93 Difference]: Finished difference Result 84 states and 87 transitions. [2022-04-06 19:48:38,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 19:48:38,810 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 19:48:38,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:38,810 INFO L225 Difference]: With dead ends: 84 [2022-04-06 19:48:38,810 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 19:48:38,811 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 140 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=354, Invalid=4616, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:48:38,811 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2007 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:38,811 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 159 Invalid, 2070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2007 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:48:38,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 19:48:38,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 19:48:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:38,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-04-06 19:48:38,816 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 73 [2022-04-06 19:48:38,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:38,816 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-04-06 19:48:38,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 33 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:38,817 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-04-06 19:48:38,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 19:48:38,817 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:38,817 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:38,832 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 19:48:39,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:39,032 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:39,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:39,032 INFO L85 PathProgramCache]: Analyzing trace with hash -246442112, now seen corresponding path program 57 times [2022-04-06 19:48:39,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:39,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1270861949] [2022-04-06 19:48:39,033 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:39,033 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:39,033 INFO L85 PathProgramCache]: Analyzing trace with hash -246442112, now seen corresponding path program 58 times [2022-04-06 19:48:39,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:39,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198606803] [2022-04-06 19:48:39,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:39,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:39,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:39,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198606803] [2022-04-06 19:48:39,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198606803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:39,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529585794] [2022-04-06 19:48:39,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:39,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:39,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:39,532 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 19:48:39,532 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 19:48:39,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:39,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:39,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 19:48:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:39,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:39,789 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:41,538 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529585794] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:41,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 69 [2022-04-06 19:48:41,539 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:41,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1270861949] [2022-04-06 19:48:41,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1270861949] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:41,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:41,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 19:48:41,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266021425] [2022-04-06 19:48:41,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:41,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 19:48:41,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:41,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 19:48:41,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=3435, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 19:48:41,540 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:42,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:42,548 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-04-06 19:48:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 19:48:42,548 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-04-06 19:48:42,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:42,548 INFO L225 Difference]: With dead ends: 86 [2022-04-06 19:48:42,548 INFO L226 Difference]: Without dead ends: 78 [2022-04-06 19:48:42,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 19:48:42,550 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 2094 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 2159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:42,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 129 Invalid, 2159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2094 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:42,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-04-06 19:48:42,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2022-04-06 19:48:42,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-04-06 19:48:42,555 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 75 [2022-04-06 19:48:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:42,555 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-04-06 19:48:42,555 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 34 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:42,555 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-04-06 19:48:42,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 19:48:42,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:42,555 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:42,584 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:42,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:42,771 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:42,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1334268701, now seen corresponding path program 59 times [2022-04-06 19:48:42,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:42,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [378993126] [2022-04-06 19:48:42,773 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:42,773 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:42,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1334268701, now seen corresponding path program 60 times [2022-04-06 19:48:42,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:42,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316555975] [2022-04-06 19:48:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:42,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:43,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:43,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:43,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:43,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316555975] [2022-04-06 19:48:43,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316555975] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:43,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804223505] [2022-04-06 19:48:43,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:43,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:43,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:43,399 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 19:48:43,400 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 19:48:43,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:43,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:43,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:48:43,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:43,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 19:48:43,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:43,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 96 proven. 1 refuted. 0 times theorem prover too weak. 992 trivial. 0 not checked. [2022-04-06 19:48:43,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804223505] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:43,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:43,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 4, 5] total 41 [2022-04-06 19:48:43,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:43,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [378993126] [2022-04-06 19:48:43,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [378993126] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:43,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:43,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 19:48:43,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055488116] [2022-04-06 19:48:43,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:43,790 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 19:48:43,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:43,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 19:48:43,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=1392, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 19:48:43,790 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:44,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:44,636 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-04-06 19:48:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 19:48:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-04-06 19:48:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:44,637 INFO L225 Difference]: With dead ends: 88 [2022-04-06 19:48:44,637 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 19:48:44,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 532 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=574, Invalid=4828, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:48:44,638 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2155 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 2222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 2155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:44,638 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 74 Invalid, 2222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 2155 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:44,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 19:48:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-04-06 19:48:44,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0266666666666666) internal successors, (77), 75 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:44,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-04-06 19:48:44,643 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2022-04-06 19:48:44,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:44,643 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-04-06 19:48:44,643 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 35 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:44,643 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-04-06 19:48:44,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 19:48:44,643 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:44,643 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:44,659 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 19:48:44,855 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,SelfDestructingSolverStorable34 [2022-04-06 19:48:44,855 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash -21062790, now seen corresponding path program 61 times [2022-04-06 19:48:44,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:44,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1723271983] [2022-04-06 19:48:44,857 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:44,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:44,857 INFO L85 PathProgramCache]: Analyzing trace with hash -21062790, now seen corresponding path program 62 times [2022-04-06 19:48:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:44,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074375048] [2022-04-06 19:48:44,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:44,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:45,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:45,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:45,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:45,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074375048] [2022-04-06 19:48:45,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074375048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:45,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321188915] [2022-04-06 19:48:45,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:45,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:45,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:45,458 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 19:48:45,459 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 19:48:45,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:45,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:45,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 19:48:45,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:45,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:45,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:47,542 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:47,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321188915] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:47,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:47,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 74 [2022-04-06 19:48:47,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:47,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1723271983] [2022-04-06 19:48:47,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1723271983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:47,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:47,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 19:48:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072160373] [2022-04-06 19:48:47,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:47,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 19:48:47,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 19:48:47,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1439, Invalid=3963, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:48:47,544 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:48,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:48,409 INFO L93 Difference]: Finished difference Result 90 states and 93 transitions. [2022-04-06 19:48:48,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 19:48:48,409 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 19:48:48,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:48,410 INFO L225 Difference]: With dead ends: 90 [2022-04-06 19:48:48,410 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 19:48:48,411 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 122 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2831, Invalid=8725, Unknown=0, NotChecked=0, Total=11556 [2022-04-06 19:48:48,411 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2412 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 2481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:48,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 179 Invalid, 2481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 19:48:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 19:48:48,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 19:48:48,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:48,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-04-06 19:48:48,421 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 79 [2022-04-06 19:48:48,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:48,421 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-04-06 19:48:48,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 36 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-04-06 19:48:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 19:48:48,425 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:48,425 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:48,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 19:48:48,640 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,SelfDestructingSolverStorable35 [2022-04-06 19:48:48,641 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:48,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:48,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1119534953, now seen corresponding path program 63 times [2022-04-06 19:48:48,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:48,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1887573301] [2022-04-06 19:48:48,642 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:48,642 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:48,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1119534953, now seen corresponding path program 64 times [2022-04-06 19:48:48,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:48,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589764611] [2022-04-06 19:48:48,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:48,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:49,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:49,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:49,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589764611] [2022-04-06 19:48:49,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589764611] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:49,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967870273] [2022-04-06 19:48:49,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:49,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:49,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:49,140 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 19:48:49,141 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 19:48:49,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:49,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:49,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 19:48:49,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:49,420 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:49,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 629 refuted. 0 times theorem prover too weak. 596 trivial. 0 not checked. [2022-04-06 19:48:49,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967870273] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:49,553 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:49,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 40, 6] total 44 [2022-04-06 19:48:49,553 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:49,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1887573301] [2022-04-06 19:48:49,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1887573301] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:49,553 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:49,553 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 19:48:49,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884612620] [2022-04-06 19:48:49,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:49,554 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 19:48:49,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:49,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 19:48:49,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 19:48:49,556 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:50,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:50,400 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-04-06 19:48:50,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 19:48:50,400 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-04-06 19:48:50,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:50,400 INFO L225 Difference]: With dead ends: 92 [2022-04-06 19:48:50,400 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 19:48:50,401 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 156 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=398, Invalid=5764, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:48:50,401 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2379 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 2379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:50,401 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 39 Invalid, 2450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 2379 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 19:48:50,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 19:48:50,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 19:48:50,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:50,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-04-06 19:48:50,406 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 81 [2022-04-06 19:48:50,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:50,406 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-04-06 19:48:50,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 37 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:50,407 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-04-06 19:48:50,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 19:48:50,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:50,407 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:50,422 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 19:48:50,622 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,SelfDestructingSolverStorable36 [2022-04-06 19:48:50,622 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:50,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:50,623 INFO L85 PathProgramCache]: Analyzing trace with hash -189328780, now seen corresponding path program 65 times [2022-04-06 19:48:50,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:50,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [564699187] [2022-04-06 19:48:50,630 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:50,630 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:50,631 INFO L85 PathProgramCache]: Analyzing trace with hash -189328780, now seen corresponding path program 66 times [2022-04-06 19:48:50,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:50,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200690963] [2022-04-06 19:48:50,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:50,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:51,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:51,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:51,271 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:51,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:51,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200690963] [2022-04-06 19:48:51,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200690963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:51,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612165422] [2022-04-06 19:48:51,271 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:48:51,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:51,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:51,272 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 19:48:51,273 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 19:48:51,306 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:48:51,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:51,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:48:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:51,454 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 19:48:51,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:51,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 105 proven. 1 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2022-04-06 19:48:51,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612165422] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:51,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:51,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 4, 4] total 43 [2022-04-06 19:48:51,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:51,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [564699187] [2022-04-06 19:48:51,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [564699187] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:51,604 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:51,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 19:48:51,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494910219] [2022-04-06 19:48:51,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:51,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 19:48:51,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:51,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 19:48:51,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=1546, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 19:48:51,605 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:52,641 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-04-06 19:48:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 19:48:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-04-06 19:48:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:52,642 INFO L225 Difference]: With dead ends: 94 [2022-04-06 19:48:52,642 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 19:48:52,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 164 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=612, Invalid=5550, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:48:52,643 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 2524 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 2524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:52,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 44 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 2524 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:48:52,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 19:48:52,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-04-06 19:48:52,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-04-06 19:48:52,650 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 83 [2022-04-06 19:48:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:52,650 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-04-06 19:48:52,650 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 38 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-04-06 19:48:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 19:48:52,650 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:52,650 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:52,666 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 19:48:52,850 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:52,851 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:52,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:52,851 INFO L85 PathProgramCache]: Analyzing trace with hash 385605905, now seen corresponding path program 67 times [2022-04-06 19:48:52,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:52,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [840207352] [2022-04-06 19:48:52,853 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:52,853 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:52,853 INFO L85 PathProgramCache]: Analyzing trace with hash 385605905, now seen corresponding path program 68 times [2022-04-06 19:48:52,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:52,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286022731] [2022-04-06 19:48:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:52,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:52,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:53,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:53,524 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:53,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286022731] [2022-04-06 19:48:53,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286022731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:53,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342109150] [2022-04-06 19:48:53,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:48:53,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:53,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:53,525 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 19:48:53,526 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 19:48:53,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:48:53,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:53,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 19:48:53,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:53,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:53,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:54,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 702 refuted. 0 times theorem prover too weak. 667 trivial. 0 not checked. [2022-04-06 19:48:54,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342109150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:54,171 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:54,171 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 42, 6] total 46 [2022-04-06 19:48:54,171 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:54,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [840207352] [2022-04-06 19:48:54,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [840207352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:54,172 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:54,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 19:48:54,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506524399] [2022-04-06 19:48:54,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:54,172 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 19:48:54,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 19:48:54,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1906, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 19:48:54,172 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:55,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:55,332 INFO L93 Difference]: Finished difference Result 96 states and 99 transitions. [2022-04-06 19:48:55,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 19:48:55,332 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 19:48:55,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:55,333 INFO L225 Difference]: With dead ends: 96 [2022-04-06 19:48:55,333 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 19:48:55,334 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=420, Invalid=6386, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 19:48:55,334 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 2823 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 2898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2823 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:55,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 174 Invalid, 2898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2823 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:48:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 19:48:55,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 19:48:55,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:55,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-04-06 19:48:55,347 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 85 [2022-04-06 19:48:55,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:55,348 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-04-06 19:48:55,348 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 39 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:55,348 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-04-06 19:48:55,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-04-06 19:48:55,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:55,351 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:55,366 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 19:48:55,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 19:48:55,563 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:48:55,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:48:55,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1152942994, now seen corresponding path program 69 times [2022-04-06 19:48:55,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:55,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1737422032] [2022-04-06 19:48:55,565 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:48:55,565 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:48:55,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1152942994, now seen corresponding path program 70 times [2022-04-06 19:48:55,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:48:55,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876890167] [2022-04-06 19:48:55,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:48:55,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:48:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:56,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:48:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:48:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:56,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:48:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876890167] [2022-04-06 19:48:56,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876890167] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:48:56,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524445468] [2022-04-06 19:48:56,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:48:56,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:48:56,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:48:56,237 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 19:48:56,238 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 19:48:56,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:48:56,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:48:56,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 78 conjunts are in the unsatisfiable core [2022-04-06 19:48:56,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:48:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:56,540 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:48:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:48:58,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524445468] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:48:58,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:48:58,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 41] total 81 [2022-04-06 19:48:58,848 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:48:58,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1737422032] [2022-04-06 19:48:58,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1737422032] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:48:58,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:48:58,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 19:48:58,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894049155] [2022-04-06 19:48:58,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:48:58,849 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 19:48:58,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:48:58,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 19:48:58,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1719, Invalid=4761, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 19:48:58,849 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:59,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:48:59,819 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-04-06 19:48:59,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 19:48:59,819 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-04-06 19:48:59,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:48:59,820 INFO L225 Difference]: With dead ends: 98 [2022-04-06 19:48:59,820 INFO L226 Difference]: Without dead ends: 90 [2022-04-06 19:48:59,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 135 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3427, Invalid=10615, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 19:48:59,822 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 46 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2874 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 2874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:48:59,823 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 94 Invalid, 2951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 2874 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:48:59,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-04-06 19:48:59,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-04-06 19:48:59,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:59,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-04-06 19:48:59,832 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 87 [2022-04-06 19:48:59,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:48:59,832 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-04-06 19:48:59,832 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 40 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:48:59,832 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-04-06 19:48:59,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 19:48:59,838 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:48:59,838 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:48:59,853 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 19:49:00,053 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,SelfDestructingSolverStorable39 [2022-04-06 19:49:00,053 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:00,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2065282187, now seen corresponding path program 71 times [2022-04-06 19:49:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:00,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1889893536] [2022-04-06 19:49:00,056 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:00,056 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:00,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2065282187, now seen corresponding path program 72 times [2022-04-06 19:49:00,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:00,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834236702] [2022-04-06 19:49:00,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:00,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:00,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:00,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:00,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:00,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:00,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834236702] [2022-04-06 19:49:00,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834236702] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:00,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158133398] [2022-04-06 19:49:00,771 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:00,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:00,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:00,772 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 19:49:00,773 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 19:49:00,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:49:00,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:49:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 19:49:00,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 114 proven. 1 refuted. 0 times theorem prover too weak. 1406 trivial. 0 not checked. [2022-04-06 19:49:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158133398] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:01,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:01,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 4, 5] total 47 [2022-04-06 19:49:01,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:01,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1889893536] [2022-04-06 19:49:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1889893536] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:01,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:01,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 19:49:01,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140283326] [2022-04-06 19:49:01,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:01,195 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 19:49:01,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:01,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 19:49:01,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=1872, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 19:49:01,197 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:02,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:02,358 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-04-06 19:49:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 19:49:02,358 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-04-06 19:49:02,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:02,364 INFO L225 Difference]: With dead ends: 100 [2022-04-06 19:49:02,364 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 19:49:02,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=676, Invalid=6634, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:49:02,365 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 3085 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 3164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 3085 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:02,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 144 Invalid, 3164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 3085 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:49:02,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 19:49:02,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 19:49:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 87 states have (on average 1.0229885057471264) internal successors, (89), 87 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:02,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-04-06 19:49:02,385 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2022-04-06 19:49:02,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:02,386 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-04-06 19:49:02,386 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 41 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:02,386 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-04-06 19:49:02,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 19:49:02,386 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:02,386 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:02,391 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 19:49:02,589 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:02,590 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:02,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:02,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1891739288, now seen corresponding path program 73 times [2022-04-06 19:49:02,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:02,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1209400659] [2022-04-06 19:49:02,592 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:02,592 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:02,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1891739288, now seen corresponding path program 74 times [2022-04-06 19:49:02,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:02,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647420601] [2022-04-06 19:49:02,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:02,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:03,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:03,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:03,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647420601] [2022-04-06 19:49:03,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647420601] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:03,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962566836] [2022-04-06 19:49:03,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:03,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:03,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:03,188 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 19:49:03,189 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 19:49:03,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:03,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:03,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 19:49:03,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:03,467 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:03,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:05,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962566836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:05,437 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:05,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 86 [2022-04-06 19:49:05,437 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:05,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1209400659] [2022-04-06 19:49:05,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1209400659] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:05,437 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:05,437 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 19:49:05,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281276256] [2022-04-06 19:49:05,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:05,438 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 19:49:05,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:05,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 19:49:05,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1931, Invalid=5379, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:49:05,438 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:06,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:06,836 INFO L93 Difference]: Finished difference Result 102 states and 105 transitions. [2022-04-06 19:49:06,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 19:49:06,836 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 19:49:06,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:06,836 INFO L225 Difference]: With dead ends: 102 [2022-04-06 19:49:06,836 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 19:49:06,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3809, Invalid=11941, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 19:49:06,838 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 3246 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 3327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 3246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:06,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 149 Invalid, 3327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 3246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:49:06,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 19:49:06,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-04-06 19:49:06,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-04-06 19:49:06,844 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 91 [2022-04-06 19:49:06,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:06,844 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-04-06 19:49:06,844 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 42 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-04-06 19:49:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 19:49:06,844 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:06,844 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:06,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:07,060 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,SelfDestructingSolverStorable41 [2022-04-06 19:49:07,060 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash 751647493, now seen corresponding path program 75 times [2022-04-06 19:49:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [150511646] [2022-04-06 19:49:07,062 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:07,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash 751647493, now seen corresponding path program 76 times [2022-04-06 19:49:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:07,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825881738] [2022-04-06 19:49:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:07,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:07,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:07,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:07,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825881738] [2022-04-06 19:49:07,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825881738] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:07,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38616486] [2022-04-06 19:49:07,604 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:07,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:07,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:07,605 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 19:49:07,605 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 19:49:07,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:07,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:07,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 19:49:07,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:07,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:07,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 860 refuted. 0 times theorem prover too weak. 821 trivial. 0 not checked. [2022-04-06 19:49:08,034 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38616486] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:08,034 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:08,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 46, 6] total 50 [2022-04-06 19:49:08,035 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:08,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [150511646] [2022-04-06 19:49:08,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [150511646] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:08,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:08,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 19:49:08,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622254789] [2022-04-06 19:49:08,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:08,035 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 19:49:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:08,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 19:49:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=2270, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 19:49:08,036 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:09,213 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-04-06 19:49:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 19:49:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-04-06 19:49:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:09,214 INFO L225 Difference]: With dead ends: 104 [2022-04-06 19:49:09,214 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 19:49:09,215 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 180 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=464, Invalid=7726, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 19:49:09,229 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 3423 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 3506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 3423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:09,229 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 164 Invalid, 3506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 3423 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 19:49:09,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 19:49:09,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 19:49:09,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:09,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-04-06 19:49:09,235 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 93 [2022-04-06 19:49:09,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:09,236 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-04-06 19:49:09,236 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 43 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:09,236 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-04-06 19:49:09,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 19:49:09,236 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:09,236 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:09,253 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:09,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:09,452 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:09,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:09,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1574295198, now seen corresponding path program 77 times [2022-04-06 19:49:09,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:09,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1024767151] [2022-04-06 19:49:09,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:09,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1574295198, now seen corresponding path program 78 times [2022-04-06 19:49:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:09,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400958910] [2022-04-06 19:49:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:10,007 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:10,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:10,007 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400958910] [2022-04-06 19:49:10,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400958910] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:10,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122841275] [2022-04-06 19:49:10,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:10,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:10,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:10,009 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 19:49:10,009 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 19:49:10,041 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:49:10,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:10,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:49:10,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:10,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 19:49:10,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:10,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 123 proven. 1 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2022-04-06 19:49:10,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122841275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:10,304 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:10,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 4, 4] total 49 [2022-04-06 19:49:10,304 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:10,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1024767151] [2022-04-06 19:49:10,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1024767151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:10,304 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:10,304 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 19:49:10,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905264899] [2022-04-06 19:49:10,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:10,305 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 19:49:10,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:10,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 19:49:10,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=2050, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 19:49:10,305 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:11,588 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-04-06 19:49:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 19:49:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-04-06 19:49:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:11,589 INFO L225 Difference]: With dead ends: 106 [2022-04-06 19:49:11,589 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 19:49:11,589 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=714, Invalid=7476, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 19:49:11,590 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3418 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 3503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 3418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:11,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 24 Invalid, 3503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 3418 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 19:49:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 19:49:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2022-04-06 19:49:11,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:11,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-04-06 19:49:11,601 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 95 [2022-04-06 19:49:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:11,601 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-04-06 19:49:11,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 44 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:11,601 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-04-06 19:49:11,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 19:49:11,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:11,602 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:11,817 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:11,817 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:11,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:11,817 INFO L85 PathProgramCache]: Analyzing trace with hash 872739967, now seen corresponding path program 79 times [2022-04-06 19:49:11,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:11,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1987791386] [2022-04-06 19:49:11,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:11,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash 872739967, now seen corresponding path program 80 times [2022-04-06 19:49:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:11,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291423175] [2022-04-06 19:49:11,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:11,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:12,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291423175] [2022-04-06 19:49:12,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291423175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:12,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037812598] [2022-04-06 19:49:12,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:12,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:12,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:12,513 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 19:49:12,514 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 19:49:12,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:12,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:12,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 19:49:12,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:12,926 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 945 refuted. 0 times theorem prover too weak. 904 trivial. 0 not checked. [2022-04-06 19:49:13,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037812598] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:13,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:13,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 48, 6] total 52 [2022-04-06 19:49:13,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:13,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1987791386] [2022-04-06 19:49:13,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1987791386] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:13,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:13,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 19:49:13,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385339415] [2022-04-06 19:49:13,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:13,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 19:49:13,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:13,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 19:49:13,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=2464, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:49:13,164 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:15,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:15,017 INFO L93 Difference]: Finished difference Result 108 states and 111 transitions. [2022-04-06 19:49:15,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 19:49:15,017 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 19:49:15,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:15,018 INFO L225 Difference]: With dead ends: 108 [2022-04-06 19:49:15,018 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 19:49:15,018 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 188 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=486, Invalid=8444, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 19:49:15,019 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 3621 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 3708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 3621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:15,019 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 54 Invalid, 3708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 3621 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:49:15,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 19:49:15,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-04-06 19:49:15,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:15,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-04-06 19:49:15,025 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 97 [2022-04-06 19:49:15,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:15,025 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-04-06 19:49:15,025 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 45 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:15,025 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-04-06 19:49:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-04-06 19:49:15,025 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:15,025 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:15,061 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 19:49:15,226 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,SelfDestructingSolverStorable44 [2022-04-06 19:49:15,226 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:15,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:15,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1168544676, now seen corresponding path program 81 times [2022-04-06 19:49:15,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:15,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [293554167] [2022-04-06 19:49:15,228 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:15,228 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:15,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1168544676, now seen corresponding path program 82 times [2022-04-06 19:49:15,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:15,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3037106] [2022-04-06 19:49:15,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:15,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:15,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:15,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:15,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:15,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3037106] [2022-04-06 19:49:15,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3037106] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:15,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979453058] [2022-04-06 19:49:15,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:15,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:15,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:16,003 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 19:49:16,004 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 19:49:16,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:16,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:16,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 19:49:16,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:16,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:19,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979453058] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:19,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:19,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 93 [2022-04-06 19:49:19,881 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:19,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [293554167] [2022-04-06 19:49:19,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [293554167] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:19,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:19,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 19:49:19,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945538900] [2022-04-06 19:49:19,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:19,881 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 19:49:19,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:19,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 19:49:19,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2253, Invalid=6303, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 19:49:19,882 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:21,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:21,548 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2022-04-06 19:49:21,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 19:49:21,548 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-04-06 19:49:21,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:21,549 INFO L225 Difference]: With dead ends: 110 [2022-04-06 19:49:21,549 INFO L226 Difference]: Without dead ends: 102 [2022-04-06 19:49:21,550 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=4495, Invalid=14137, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 19:49:21,551 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 3882 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 3971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 3882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:21,552 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 129 Invalid, 3971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 3882 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 19:49:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-04-06 19:49:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-04-06 19:49:21,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:21,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-04-06 19:49:21,558 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 99 [2022-04-06 19:49:21,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:21,558 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-04-06 19:49:21,558 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 46 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:21,558 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-04-06 19:49:21,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 19:49:21,558 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:21,558 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:21,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:21,759 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,SelfDestructingSolverStorable45 [2022-04-06 19:49:21,759 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:21,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash -43032327, now seen corresponding path program 83 times [2022-04-06 19:49:21,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:21,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079029328] [2022-04-06 19:49:21,765 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:21,765 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:21,765 INFO L85 PathProgramCache]: Analyzing trace with hash -43032327, now seen corresponding path program 84 times [2022-04-06 19:49:21,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:21,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801293766] [2022-04-06 19:49:21,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:21,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:21,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:22,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:22,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:22,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801293766] [2022-04-06 19:49:22,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801293766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101909851] [2022-04-06 19:49:22,566 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:22,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:22,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:22,567 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 19:49:22,569 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 19:49:22,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:49:22,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:22,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:49:22,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 19:49:22,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 132 proven. 1 refuted. 0 times theorem prover too weak. 1892 trivial. 0 not checked. [2022-04-06 19:49:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101909851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:22,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:22,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 4, 4] total 52 [2022-04-06 19:49:22,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:22,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079029328] [2022-04-06 19:49:22,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079029328] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:22,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:22,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 19:49:22,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795606046] [2022-04-06 19:49:22,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:22,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 19:49:22,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:22,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 19:49:22,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=2329, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 19:49:22,856 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:24,320 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-04-06 19:49:24,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 19:49:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-04-06 19:49:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:24,321 INFO L225 Difference]: With dead ends: 112 [2022-04-06 19:49:24,321 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 19:49:24,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=765, Invalid=8547, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 19:49:24,323 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 4099 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 4190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 4099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:24,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 164 Invalid, 4190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 4099 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 19:49:24,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 19:49:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-04-06 19:49:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.02020202020202) internal successors, (101), 99 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:24,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-04-06 19:49:24,351 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2022-04-06 19:49:24,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:24,351 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-04-06 19:49:24,352 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 47 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:24,352 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-04-06 19:49:24,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 19:49:24,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:24,352 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:24,370 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 19:49:24,567 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,SelfDestructingSolverStorable46 [2022-04-06 19:49:24,568 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:24,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:24,568 INFO L85 PathProgramCache]: Analyzing trace with hash -757423530, now seen corresponding path program 85 times [2022-04-06 19:49:24,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094697692] [2022-04-06 19:49:24,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:24,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:24,569 INFO L85 PathProgramCache]: Analyzing trace with hash -757423530, now seen corresponding path program 86 times [2022-04-06 19:49:24,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:24,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275552606] [2022-04-06 19:49:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:24,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:25,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:25,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:25,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:25,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275552606] [2022-04-06 19:49:25,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275552606] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:25,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061729139] [2022-04-06 19:49:25,344 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:25,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:25,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:25,345 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 19:49:25,345 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 19:49:25,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:25,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:25,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 19:49:25,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:25,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:25,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061729139] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:29,162 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:29,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 49] total 97 [2022-04-06 19:49:29,162 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:29,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094697692] [2022-04-06 19:49:29,162 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094697692] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:29,162 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:29,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 19:49:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45085195] [2022-04-06 19:49:29,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:29,163 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 19:49:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 19:49:29,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2447, Invalid=6865, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 19:49:29,163 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:31,032 INFO L93 Difference]: Finished difference Result 114 states and 117 transitions. [2022-04-06 19:49:31,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 19:49:31,032 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 19:49:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:31,033 INFO L225 Difference]: With dead ends: 114 [2022-04-06 19:49:31,033 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 19:49:31,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 159 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4883, Invalid=15423, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 19:49:31,034 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 4290 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 4383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 4290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:31,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 174 Invalid, 4383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 4290 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:49:31,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 19:49:31,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-04-06 19:49:31,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:31,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-04-06 19:49:31,040 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 103 [2022-04-06 19:49:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:31,041 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-04-06 19:49:31,041 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 48 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:31,041 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-04-06 19:49:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 19:49:31,041 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:31,041 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:31,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-04-06 19:49:31,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:31,242 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:31,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:31,243 INFO L85 PathProgramCache]: Analyzing trace with hash -92602253, now seen corresponding path program 87 times [2022-04-06 19:49:31,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:31,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [405275603] [2022-04-06 19:49:31,244 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:31,244 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:31,244 INFO L85 PathProgramCache]: Analyzing trace with hash -92602253, now seen corresponding path program 88 times [2022-04-06 19:49:31,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:31,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768189804] [2022-04-06 19:49:31,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:31,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:31,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:31,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768189804] [2022-04-06 19:49:31,893 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768189804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:31,893 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946257715] [2022-04-06 19:49:31,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:31,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:31,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:31,894 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 19:49:31,895 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 19:49:31,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:31,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:31,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 19:49:31,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:32,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:32,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 1127 refuted. 0 times theorem prover too weak. 1082 trivial. 0 not checked. [2022-04-06 19:49:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946257715] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:32,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:32,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 52, 6] total 56 [2022-04-06 19:49:32,627 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:32,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [405275603] [2022-04-06 19:49:32,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [405275603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:32,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:32,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 19:49:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548415224] [2022-04-06 19:49:32,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:32,628 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 19:49:32,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:32,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 19:49:32,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=2876, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 19:49:32,628 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:34,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:34,544 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-04-06 19:49:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 19:49:34,544 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-04-06 19:49:34,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:34,545 INFO L225 Difference]: With dead ends: 116 [2022-04-06 19:49:34,545 INFO L226 Difference]: Without dead ends: 108 [2022-04-06 19:49:34,546 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 204 SyntacticMatches, 3 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=530, Invalid=9976, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 19:49:34,546 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 4479 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 4574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:34,546 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 179 Invalid, 4574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4479 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:49:34,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-04-06 19:49:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2022-04-06 19:49:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-04-06 19:49:34,553 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 105 [2022-04-06 19:49:34,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:34,553 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-04-06 19:49:34,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 49 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:34,553 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-04-06 19:49:34,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 19:49:34,554 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:34,554 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:34,569 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-04-06 19:49:34,763 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-04-06 19:49:34,763 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash -1149482160, now seen corresponding path program 89 times [2022-04-06 19:49:34,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:34,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1574865979] [2022-04-06 19:49:34,765 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:34,765 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:34,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1149482160, now seen corresponding path program 90 times [2022-04-06 19:49:34,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:34,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071182855] [2022-04-06 19:49:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:34,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:35,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:35,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:35,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:35,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071182855] [2022-04-06 19:49:35,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071182855] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:35,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552658738] [2022-04-06 19:49:35,604 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:35,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:35,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:35,605 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 19:49:35,605 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 19:49:35,666 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:49:35,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:35,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:49:35,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 19:49:35,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 141 proven. 1 refuted. 0 times theorem prover too weak. 2162 trivial. 0 not checked. [2022-04-06 19:49:35,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552658738] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:35,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:35,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 4, 4] total 55 [2022-04-06 19:49:35,974 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:35,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1574865979] [2022-04-06 19:49:35,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1574865979] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:35,974 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:35,974 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 19:49:35,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875229199] [2022-04-06 19:49:35,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:35,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 19:49:35,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:35,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 19:49:35,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=2626, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 19:49:35,976 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:38,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:38,389 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-04-06 19:49:38,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 19:49:38,389 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-04-06 19:49:38,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:38,389 INFO L225 Difference]: With dead ends: 118 [2022-04-06 19:49:38,390 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 19:49:38,390 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=816, Invalid=9690, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 19:49:38,391 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 56 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 4726 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 4726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:38,391 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 229 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 4726 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 19:49:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 19:49:38,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-04-06 19:49:38,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-04-06 19:49:38,397 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 107 [2022-04-06 19:49:38,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:38,397 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-04-06 19:49:38,397 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 50 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:38,397 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-04-06 19:49:38,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 19:49:38,398 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:38,398 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:38,401 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 19:49:38,601 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 19:49:38,602 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:38,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:38,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1096176365, now seen corresponding path program 91 times [2022-04-06 19:49:38,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:38,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [455224124] [2022-04-06 19:49:38,603 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:38,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:38,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1096176365, now seen corresponding path program 92 times [2022-04-06 19:49:38,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:38,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638931019] [2022-04-06 19:49:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:38,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:38,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:39,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:39,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:39,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:39,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:39,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638931019] [2022-04-06 19:49:39,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638931019] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:39,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138418988] [2022-04-06 19:49:39,682 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:39,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:39,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:39,683 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 19:49:39,684 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 19:49:39,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:39,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:39,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 19:49:39,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:40,242 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:40,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 1224 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2022-04-06 19:49:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138418988] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:40,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:40,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 54, 6] total 58 [2022-04-06 19:49:40,464 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:40,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [455224124] [2022-04-06 19:49:40,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [455224124] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:40,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:40,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 19:49:40,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307904632] [2022-04-06 19:49:40,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:40,465 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 19:49:40,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:40,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 19:49:40,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3094, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:49:40,465 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:42,956 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2022-04-06 19:49:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 19:49:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 19:49:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:42,957 INFO L225 Difference]: With dead ends: 120 [2022-04-06 19:49:42,957 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 19:49:42,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=552, Invalid=10790, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 19:49:42,958 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4803 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4902 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:42,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 134 Invalid, 4902 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4803 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 19:49:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 19:49:42,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-04-06 19:49:42,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-04-06 19:49:42,967 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 109 [2022-04-06 19:49:42,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:42,967 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-04-06 19:49:42,967 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 51 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-04-06 19:49:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 19:49:42,968 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:42,968 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:42,984 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 19:49:43,168 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:43,169 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:43,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:43,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1194530998, now seen corresponding path program 93 times [2022-04-06 19:49:43,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1509732585] [2022-04-06 19:49:43,170 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:43,170 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:43,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1194530998, now seen corresponding path program 94 times [2022-04-06 19:49:43,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:43,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080574214] [2022-04-06 19:49:43,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:43,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:43,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:44,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:44,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:44,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:44,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080574214] [2022-04-06 19:49:44,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080574214] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:44,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437185278] [2022-04-06 19:49:44,069 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:49:44,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:44,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:44,070 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 19:49:44,071 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 19:49:44,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:49:44,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:44,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 19:49:44,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:44,461 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:44,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:48,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:48,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437185278] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:48,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:48,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 53] total 105 [2022-04-06 19:49:48,655 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:48,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1509732585] [2022-04-06 19:49:48,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1509732585] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:48,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:48,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 19:49:48,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879428407] [2022-04-06 19:49:48,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:48,655 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 19:49:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:48,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 19:49:48,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2859, Invalid=8061, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 19:49:48,656 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:50,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:50,485 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-04-06 19:49:50,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 19:49:50,486 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-04-06 19:49:50,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:50,486 INFO L225 Difference]: With dead ends: 122 [2022-04-06 19:49:50,486 INFO L226 Difference]: Without dead ends: 114 [2022-04-06 19:49:50,487 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 171 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5707, Invalid=18163, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 19:49:50,487 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 5124 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 5225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 5124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:50,487 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 239 Invalid, 5225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 5124 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:49:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-04-06 19:49:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2022-04-06 19:49:50,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:50,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-04-06 19:49:50,494 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 111 [2022-04-06 19:49:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:50,494 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-04-06 19:49:50,494 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 52 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-04-06 19:49:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 19:49:50,495 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:50,495 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:50,515 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 19:49:50,711 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,SelfDestructingSolverStorable51 [2022-04-06 19:49:50,711 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:50,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:50,712 INFO L85 PathProgramCache]: Analyzing trace with hash 753916007, now seen corresponding path program 95 times [2022-04-06 19:49:50,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:50,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [350206955] [2022-04-06 19:49:50,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:50,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:50,713 INFO L85 PathProgramCache]: Analyzing trace with hash 753916007, now seen corresponding path program 96 times [2022-04-06 19:49:50,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:50,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599143567] [2022-04-06 19:49:50,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:50,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:51,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:51,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:51,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:51,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:51,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599143567] [2022-04-06 19:49:51,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599143567] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:51,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194159798] [2022-04-06 19:49:51,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:49:51,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:51,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:51,823 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 19:49:51,824 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 19:49:51,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:49:51,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:51,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:49:51,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:52,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 19:49:52,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:52,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 150 proven. 1 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2022-04-06 19:49:52,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194159798] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:52,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:52,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 4, 4] total 58 [2022-04-06 19:49:52,277 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:52,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [350206955] [2022-04-06 19:49:52,277 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [350206955] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:52,277 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:52,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 19:49:52,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153146455] [2022-04-06 19:49:52,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:52,277 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 19:49:52,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:52,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 19:49:52,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2941, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 19:49:52,278 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:49:54,435 INFO L93 Difference]: Finished difference Result 124 states and 127 transitions. [2022-04-06 19:49:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 19:49:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-04-06 19:49:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:49:54,436 INFO L225 Difference]: With dead ends: 124 [2022-04-06 19:49:54,436 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 19:49:54,437 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=867, Invalid=10905, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 19:49:54,437 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5083 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 5083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:49:54,437 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 39 Invalid, 5186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 5083 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:49:54,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 19:49:54,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-04-06 19:49:54,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:54,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-04-06 19:49:54,444 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2022-04-06 19:49:54,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:49:54,444 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-04-06 19:49:54,445 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 53 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:49:54,445 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-04-06 19:49:54,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 19:49:54,445 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:49:54,445 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:49:54,463 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 19:49:54,661 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:54,661 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:49:54,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:49:54,662 INFO L85 PathProgramCache]: Analyzing trace with hash 605746756, now seen corresponding path program 97 times [2022-04-06 19:49:54,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:54,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2125311799] [2022-04-06 19:49:54,663 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:49:54,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:49:54,663 INFO L85 PathProgramCache]: Analyzing trace with hash 605746756, now seen corresponding path program 98 times [2022-04-06 19:49:54,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:49:54,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972885998] [2022-04-06 19:49:54,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:49:54,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:49:54,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:55,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:49:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:49:55,620 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:55,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:49:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972885998] [2022-04-06 19:49:55,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972885998] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:49:55,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089605175] [2022-04-06 19:49:55,620 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:49:55,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:49:55,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:49:55,621 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 19:49:55,651 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 19:49:55,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:49:55,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:49:55,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 19:49:55,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:49:55,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:55,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:49:59,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:49:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089605175] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:49:59,212 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:49:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 110 [2022-04-06 19:49:59,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:49:59,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2125311799] [2022-04-06 19:49:59,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2125311799] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:49:59,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:49:59,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 19:49:59,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566086900] [2022-04-06 19:49:59,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:49:59,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 19:49:59,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:49:59,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 19:49:59,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3131, Invalid=8859, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 19:49:59,214 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:01,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:01,220 INFO L93 Difference]: Finished difference Result 126 states and 129 transitions. [2022-04-06 19:50:01,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 19:50:01,220 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 19:50:01,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:01,221 INFO L225 Difference]: With dead ends: 126 [2022-04-06 19:50:01,221 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 19:50:01,222 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 176 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6197, Invalid=19885, Unknown=0, NotChecked=0, Total=26082 [2022-04-06 19:50:01,222 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 5328 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 5433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 5328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:01,222 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 74 Invalid, 5433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 5328 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:50:01,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 19:50:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-04-06 19:50:01,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:01,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-04-06 19:50:01,229 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 115 [2022-04-06 19:50:01,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:01,229 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-04-06 19:50:01,229 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 54 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:01,229 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-04-06 19:50:01,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-04-06 19:50:01,229 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:01,229 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:01,245 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 19:50:01,445 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,SelfDestructingSolverStorable53 [2022-04-06 19:50:01,445 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:01,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:01,445 INFO L85 PathProgramCache]: Analyzing trace with hash -50982687, now seen corresponding path program 99 times [2022-04-06 19:50:01,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:01,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919434232] [2022-04-06 19:50:01,447 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:01,447 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:01,447 INFO L85 PathProgramCache]: Analyzing trace with hash -50982687, now seen corresponding path program 100 times [2022-04-06 19:50:01,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:01,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751118095] [2022-04-06 19:50:01,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:01,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:01,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:02,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:02,702 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:02,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751118095] [2022-04-06 19:50:02,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751118095] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:02,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288273686] [2022-04-06 19:50:02,702 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:02,702 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:02,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:02,704 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 19:50:02,704 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 19:50:02,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:02,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:02,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 19:50:02,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:03,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:03,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 1379 trivial. 0 not checked. [2022-04-06 19:50:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288273686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:03,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:03,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 58, 6] total 62 [2022-04-06 19:50:03,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:03,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919434232] [2022-04-06 19:50:03,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919434232] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:03,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:03,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 19:50:03,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296288965] [2022-04-06 19:50:03,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:03,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 19:50:03,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:03,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 19:50:03,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=3554, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 19:50:03,607 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:05,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:05,708 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-04-06 19:50:05,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 19:50:05,708 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-04-06 19:50:05,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:05,709 INFO L225 Difference]: With dead ends: 128 [2022-04-06 19:50:05,709 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 19:50:05,710 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=596, Invalid=12514, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 19:50:05,710 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 5661 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 5768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 5661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:05,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 179 Invalid, 5768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 5661 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:50:05,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 19:50:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 19:50:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-04-06 19:50:05,722 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 117 [2022-04-06 19:50:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:05,723 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-04-06 19:50:05,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 55 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:05,723 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-04-06 19:50:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 19:50:05,723 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:05,723 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:05,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-04-06 19:50:05,939 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,SelfDestructingSolverStorable54 [2022-04-06 19:50:05,939 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:05,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash 192215102, now seen corresponding path program 101 times [2022-04-06 19:50:05,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:05,940 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1788896247] [2022-04-06 19:50:05,941 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:05,941 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash 192215102, now seen corresponding path program 102 times [2022-04-06 19:50:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:05,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929740343] [2022-04-06 19:50:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:05,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:05,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:06,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:06,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:06,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:06,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:06,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929740343] [2022-04-06 19:50:06,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929740343] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:06,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17851231] [2022-04-06 19:50:06,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:06,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:06,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:06,831 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 19:50:06,832 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 19:50:06,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:50:06,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:06,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:50:06,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:07,053 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 19:50:07,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 159 proven. 1 refuted. 0 times theorem prover too weak. 2756 trivial. 0 not checked. [2022-04-06 19:50:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17851231] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:07,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:07,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 4, 8] total 65 [2022-04-06 19:50:07,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:07,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1788896247] [2022-04-06 19:50:07,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1788896247] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:07,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:07,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 19:50:07,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160254176] [2022-04-06 19:50:07,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:07,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 19:50:07,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:07,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 19:50:07,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=3729, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:50:07,515 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:10,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:10,203 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-04-06 19:50:10,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 19:50:10,203 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-04-06 19:50:10,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:10,204 INFO L225 Difference]: With dead ends: 130 [2022-04-06 19:50:10,204 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 19:50:10,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 232 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=994, Invalid=13048, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 19:50:10,205 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 62 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 5932 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 6041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 5932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:10,206 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 229 Invalid, 6041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 5932 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:50:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 19:50:10,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2022-04-06 19:50:10,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:10,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-04-06 19:50:10,213 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 119 [2022-04-06 19:50:10,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:10,213 INFO L478 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-04-06 19:50:10,213 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 56 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:10,213 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-04-06 19:50:10,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 19:50:10,213 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:10,214 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:10,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:10,420 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:10,420 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:10,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:10,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1977056347, now seen corresponding path program 103 times [2022-04-06 19:50:10,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:10,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [665210879] [2022-04-06 19:50:10,421 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:10,421 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:10,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1977056347, now seen corresponding path program 104 times [2022-04-06 19:50:10,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:10,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454874628] [2022-04-06 19:50:10,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:10,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:11,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:11,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:11,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454874628] [2022-04-06 19:50:11,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454874628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999474842] [2022-04-06 19:50:11,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:11,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:11,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:11,318 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 19:50:11,319 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 19:50:11,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:11,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:11,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 19:50:11,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:11,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:11,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:12,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 1539 refuted. 0 times theorem prover too weak. 1486 trivial. 0 not checked. [2022-04-06 19:50:12,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999474842] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:12,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:12,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 60, 6] total 64 [2022-04-06 19:50:12,061 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:12,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [665210879] [2022-04-06 19:50:12,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [665210879] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:12,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:12,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 19:50:12,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583851616] [2022-04-06 19:50:12,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:12,061 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 19:50:12,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:12,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 19:50:12,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=3796, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 19:50:12,062 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:14,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:14,130 INFO L93 Difference]: Finished difference Result 132 states and 135 transitions. [2022-04-06 19:50:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 19:50:14,130 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 19:50:14,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:14,131 INFO L225 Difference]: With dead ends: 132 [2022-04-06 19:50:14,131 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 19:50:14,132 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 236 SyntacticMatches, 3 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=618, Invalid=13424, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 19:50:14,132 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 5937 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 6048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 5937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:14,132 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 54 Invalid, 6048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 5937 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 19:50:14,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 19:50:14,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-04-06 19:50:14,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:14,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-04-06 19:50:14,139 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 121 [2022-04-06 19:50:14,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:14,139 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-04-06 19:50:14,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 57 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:14,139 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-04-06 19:50:14,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-04-06 19:50:14,140 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:14,140 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:14,156 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 19:50:14,355 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:14,355 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:14,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:14,356 INFO L85 PathProgramCache]: Analyzing trace with hash -777425608, now seen corresponding path program 105 times [2022-04-06 19:50:14,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:14,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1846967453] [2022-04-06 19:50:14,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:14,357 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:14,357 INFO L85 PathProgramCache]: Analyzing trace with hash -777425608, now seen corresponding path program 106 times [2022-04-06 19:50:14,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:14,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563258133] [2022-04-06 19:50:14,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:14,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:14,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:15,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:15,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:15,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563258133] [2022-04-06 19:50:15,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563258133] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:15,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812526656] [2022-04-06 19:50:15,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:15,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:15,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:15,706 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 19:50:15,707 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 19:50:15,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:15,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 114 conjunts are in the unsatisfiable core [2022-04-06 19:50:15,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:16,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:21,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812526656] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:21,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:21,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 59] total 117 [2022-04-06 19:50:21,565 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:21,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1846967453] [2022-04-06 19:50:21,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1846967453] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:21,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:21,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 19:50:21,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788151165] [2022-04-06 19:50:21,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:21,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 19:50:21,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:21,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 19:50:21,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3537, Invalid=10035, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 19:50:21,566 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:23,716 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-04-06 19:50:23,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 19:50:23,716 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-04-06 19:50:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:23,717 INFO L225 Difference]: With dead ends: 134 [2022-04-06 19:50:23,717 INFO L226 Difference]: Without dead ends: 126 [2022-04-06 19:50:23,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 189 SyntacticMatches, 2 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=7063, Invalid=22693, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 19:50:23,719 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 64 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 6306 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 6419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 6306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:23,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 179 Invalid, 6419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 6306 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 19:50:23,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-04-06 19:50:23,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2022-04-06 19:50:23,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:23,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-04-06 19:50:23,730 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 123 [2022-04-06 19:50:23,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:23,730 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-04-06 19:50:23,731 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 58 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:23,731 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-04-06 19:50:23,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 19:50:23,731 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:23,731 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:23,749 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 19:50:23,947 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:23,947 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:23,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:23,947 INFO L85 PathProgramCache]: Analyzing trace with hash -2134730027, now seen corresponding path program 107 times [2022-04-06 19:50:23,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:23,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1608902504] [2022-04-06 19:50:23,948 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:23,948 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2134730027, now seen corresponding path program 108 times [2022-04-06 19:50:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:23,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938016462] [2022-04-06 19:50:23,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:23,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:24,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:24,931 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:24,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:24,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938016462] [2022-04-06 19:50:24,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938016462] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:24,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755620256] [2022-04-06 19:50:24,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:24,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:24,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:24,932 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 19:50:24,933 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 19:50:24,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:50:24,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:24,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:50:24,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:25,245 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 19:50:25,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 168 proven. 1 refuted. 0 times theorem prover too weak. 3080 trivial. 0 not checked. [2022-04-06 19:50:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755620256] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:25,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:25,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 4, 5] total 65 [2022-04-06 19:50:25,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:25,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1608902504] [2022-04-06 19:50:25,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1608902504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:25,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:25,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 19:50:25,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873852449] [2022-04-06 19:50:25,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:25,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 19:50:25,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:25,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 19:50:25,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=416, Invalid=3744, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 19:50:25,467 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:28,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:28,028 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2022-04-06 19:50:28,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 19:50:28,028 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-04-06 19:50:28,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:28,029 INFO L225 Difference]: With dead ends: 136 [2022-04-06 19:50:28,029 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 19:50:28,030 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 247 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1600 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=982, Invalid=13780, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 19:50:28,030 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 6463 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 6578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 6463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:28,030 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 124 Invalid, 6578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 6463 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:50:28,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 19:50:28,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-04-06 19:50:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.016260162601626) internal successors, (125), 123 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-04-06 19:50:28,037 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2022-04-06 19:50:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:28,037 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-04-06 19:50:28,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 59 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-04-06 19:50:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 19:50:28,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:28,038 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:28,041 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 19:50:28,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-04-06 19:50:28,239 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:28,240 INFO L85 PathProgramCache]: Analyzing trace with hash -834218702, now seen corresponding path program 109 times [2022-04-06 19:50:28,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:28,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [928893530] [2022-04-06 19:50:28,242 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:28,242 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:28,242 INFO L85 PathProgramCache]: Analyzing trace with hash -834218702, now seen corresponding path program 110 times [2022-04-06 19:50:28,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:28,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267361038] [2022-04-06 19:50:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:29,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:29,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:29,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:29,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267361038] [2022-04-06 19:50:29,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267361038] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:29,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389014520] [2022-04-06 19:50:29,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:29,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:29,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:29,669 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 19:50:29,671 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 19:50:29,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:29,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:29,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 118 conjunts are in the unsatisfiable core [2022-04-06 19:50:29,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:30,049 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:30,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:36,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389014520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:36,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 61] total 121 [2022-04-06 19:50:36,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:36,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [928893530] [2022-04-06 19:50:36,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [928893530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:36,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:36,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 19:50:36,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133295507] [2022-04-06 19:50:36,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:36,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 19:50:36,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:36,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 19:50:36,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3779, Invalid=10741, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 19:50:36,255 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:38,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:38,799 INFO L93 Difference]: Finished difference Result 138 states and 141 transitions. [2022-04-06 19:50:38,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 19:50:38,799 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 19:50:38,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:38,800 INFO L225 Difference]: With dead ends: 138 [2022-04-06 19:50:38,800 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 19:50:38,801 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1832 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=7547, Invalid=24315, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 19:50:38,801 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 6684 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 6801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 6684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:38,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 119 Invalid, 6801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 6684 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:50:38,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 19:50:38,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-04-06 19:50:38,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:38,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-04-06 19:50:38,809 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 127 [2022-04-06 19:50:38,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:38,809 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-04-06 19:50:38,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 60 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:38,809 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-04-06 19:50:38,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 19:50:38,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:38,809 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:38,826 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 19:50:39,015 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,SelfDestructingSolverStorable59 [2022-04-06 19:50:39,015 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:39,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:39,016 INFO L85 PathProgramCache]: Analyzing trace with hash -878318513, now seen corresponding path program 111 times [2022-04-06 19:50:39,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:39,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [180584455] [2022-04-06 19:50:39,017 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:39,017 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash -878318513, now seen corresponding path program 112 times [2022-04-06 19:50:39,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:39,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293870063] [2022-04-06 19:50:39,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:39,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:40,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:40,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293870063] [2022-04-06 19:50:40,042 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293870063] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:40,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210450583] [2022-04-06 19:50:40,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:40,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:40,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:40,043 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 19:50:40,050 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 19:50:40,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:40,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:40,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 123 conjunts are in the unsatisfiable core [2022-04-06 19:50:40,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:40,691 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:40,691 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 1769 refuted. 0 times theorem prover too weak. 1712 trivial. 0 not checked. [2022-04-06 19:50:41,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210450583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:41,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:41,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 64, 6] total 68 [2022-04-06 19:50:41,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [180584455] [2022-04-06 19:50:41,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [180584455] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:41,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:41,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 19:50:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718429344] [2022-04-06 19:50:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:41,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 19:50:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:41,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 19:50:41,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=4304, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 19:50:41,029 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:43,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:43,519 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2022-04-06 19:50:43,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 19:50:43,519 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-04-06 19:50:43,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:43,520 INFO L225 Difference]: With dead ends: 140 [2022-04-06 19:50:43,520 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 19:50:43,521 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 252 SyntacticMatches, 3 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1728 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=662, Invalid=15340, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 19:50:43,521 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6825 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 6825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:43,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 44 Invalid, 6944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 6825 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 19:50:43,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 19:50:43,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 19:50:43,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:43,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-04-06 19:50:43,528 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2022-04-06 19:50:43,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:43,529 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-04-06 19:50:43,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 61 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:43,529 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-04-06 19:50:43,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 19:50:43,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:43,529 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:43,545 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 19:50:43,745 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:43,745 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:43,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:43,746 INFO L85 PathProgramCache]: Analyzing trace with hash -308563924, now seen corresponding path program 113 times [2022-04-06 19:50:43,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:43,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [376092827] [2022-04-06 19:50:43,747 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:43,747 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:43,747 INFO L85 PathProgramCache]: Analyzing trace with hash -308563924, now seen corresponding path program 114 times [2022-04-06 19:50:43,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:43,747 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871084553] [2022-04-06 19:50:43,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:43,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:44,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:44,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:44,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:44,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:44,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871084553] [2022-04-06 19:50:44,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871084553] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:44,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267005111] [2022-04-06 19:50:44,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:50:44,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:44,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:44,939 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 19:50:44,940 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 19:50:44,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:50:44,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:44,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:50:44,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 19:50:45,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 177 proven. 1 refuted. 0 times theorem prover too weak. 3422 trivial. 0 not checked. [2022-04-06 19:50:45,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267005111] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:45,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:45,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 4, 4] total 67 [2022-04-06 19:50:45,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:45,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [376092827] [2022-04-06 19:50:45,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [376092827] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:45,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:45,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 19:50:45,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371497984] [2022-04-06 19:50:45,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:45,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 19:50:45,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:45,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 19:50:45,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 19:50:45,354 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:47,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:47,967 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2022-04-06 19:50:47,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 19:50:47,968 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-04-06 19:50:47,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:47,968 INFO L225 Difference]: With dead ends: 142 [2022-04-06 19:50:47,968 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 19:50:47,969 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 260 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1020, Invalid=14982, Unknown=0, NotChecked=0, Total=16002 [2022-04-06 19:50:47,969 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 7282 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 7403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 7282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:47,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 229 Invalid, 7403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 7282 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:50:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 19:50:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-04-06 19:50:47,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:47,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-04-06 19:50:47,976 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2022-04-06 19:50:47,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:47,977 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-04-06 19:50:47,978 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 62 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:47,978 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-04-06 19:50:47,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 19:50:47,978 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:47,978 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:47,994 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 19:50:48,193 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:48,194 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:48,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:48,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1764749513, now seen corresponding path program 115 times [2022-04-06 19:50:48,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:48,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [355179256] [2022-04-06 19:50:48,195 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:48,195 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:48,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1764749513, now seen corresponding path program 116 times [2022-04-06 19:50:48,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:48,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464983966] [2022-04-06 19:50:48,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:48,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:48,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:49,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:49,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464983966] [2022-04-06 19:50:49,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464983966] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:49,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74378295] [2022-04-06 19:50:49,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:50:49,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:49,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:49,354 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 19:50:49,355 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 19:50:49,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:50:49,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:49,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 19:50:49,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:49,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:50,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 1890 refuted. 0 times theorem prover too weak. 1831 trivial. 0 not checked. [2022-04-06 19:50:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74378295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:50,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:50,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 66, 6] total 70 [2022-04-06 19:50:50,071 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:50,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [355179256] [2022-04-06 19:50:50,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [355179256] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:50,071 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:50,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 19:50:50,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679935814] [2022-04-06 19:50:50,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:50,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 19:50:50,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:50,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 19:50:50,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=4570, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 19:50:50,073 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:50:52,604 INFO L93 Difference]: Finished difference Result 144 states and 147 transitions. [2022-04-06 19:50:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 19:50:52,604 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 19:50:52,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:50:52,605 INFO L225 Difference]: With dead ends: 144 [2022-04-06 19:50:52,605 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 19:50:52,606 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 260 SyntacticMatches, 3 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1847 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=684, Invalid=16346, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 19:50:52,607 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 7503 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 7626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 7503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:50:52,609 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 214 Invalid, 7626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 7503 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 19:50:52,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 19:50:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-04-06 19:50:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-04-06 19:50:52,617 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 133 [2022-04-06 19:50:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:50:52,617 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-04-06 19:50:52,617 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 63 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:50:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-04-06 19:50:52,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 19:50:52,618 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:50:52,618 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:50:52,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-04-06 19:50:52,834 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:52,834 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:50:52,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:50:52,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1354137126, now seen corresponding path program 117 times [2022-04-06 19:50:52,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:52,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1743911284] [2022-04-06 19:50:52,836 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:50:52,836 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:50:52,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1354137126, now seen corresponding path program 118 times [2022-04-06 19:50:52,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:50:52,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095104910] [2022-04-06 19:50:52,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:50:52,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:50:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:50:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:50:54,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:54,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:50:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095104910] [2022-04-06 19:50:54,026 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095104910] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:50:54,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157609078] [2022-04-06 19:50:54,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:50:54,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:50:54,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:50:54,028 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 19:50:54,028 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 19:50:54,150 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:50:54,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:50:54,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 127 conjunts are in the unsatisfiable core [2022-04-06 19:50:54,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:50:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:54,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:50:58,743 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:50:58,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157609078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:50:58,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:50:58,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2022-04-06 19:50:58,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:50:58,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1743911284] [2022-04-06 19:50:58,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1743911284] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:50:58,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:50:58,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 19:50:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12379724] [2022-04-06 19:50:58,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:50:58,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 19:50:58,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:50:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 19:50:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4351, Invalid=12419, Unknown=0, NotChecked=0, Total=16770 [2022-04-06 19:50:58,745 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:01,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:01,365 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-04-06 19:51:01,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 19:51:01,366 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-04-06 19:51:01,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:01,366 INFO L225 Difference]: With dead ends: 146 [2022-04-06 19:51:01,366 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 19:51:01,368 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 206 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=8627, Invalid=28045, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 19:51:01,368 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 70 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7704 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 7829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 7704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:01,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 179 Invalid, 7829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 7704 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 19:51:01,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 19:51:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 19:51:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:01,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-04-06 19:51:01,383 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 135 [2022-04-06 19:51:01,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:01,383 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-04-06 19:51:01,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 64 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:01,383 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-04-06 19:51:01,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 19:51:01,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:01,384 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:01,399 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 19:51:01,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:01,599 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:01,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:01,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1892624451, now seen corresponding path program 119 times [2022-04-06 19:51:01,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:01,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [367062331] [2022-04-06 19:51:01,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:01,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:01,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1892624451, now seen corresponding path program 120 times [2022-04-06 19:51:01,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:01,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664899830] [2022-04-06 19:51:01,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:01,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:02,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:02,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:02,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664899830] [2022-04-06 19:51:02,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664899830] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:02,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050871957] [2022-04-06 19:51:02,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:51:02,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:02,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:02,676 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 19:51:02,676 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 19:51:02,729 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:51:02,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:02,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:51:02,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 19:51:02,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:03,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 186 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2022-04-06 19:51:03,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050871957] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:03,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:03,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 4, 5] total 71 [2022-04-06 19:51:03,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [367062331] [2022-04-06 19:51:03,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [367062331] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:03,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:03,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 19:51:03,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287188200] [2022-04-06 19:51:03,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:03,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 19:51:03,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 19:51:03,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=4512, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 19:51:03,137 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:06,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:06,169 INFO L93 Difference]: Finished difference Result 148 states and 151 transitions. [2022-04-06 19:51:06,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 19:51:06,169 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-04-06 19:51:06,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:06,169 INFO L225 Difference]: With dead ends: 148 [2022-04-06 19:51:06,169 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 19:51:06,170 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 404 GetRequests, 271 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1084, Invalid=16738, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 19:51:06,171 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 7927 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 8054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 7927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:06,171 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 159 Invalid, 8054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 7927 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 19:51:06,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 19:51:06,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-04-06 19:51:06,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0148148148148148) internal successors, (137), 135 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-04-06 19:51:06,179 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2022-04-06 19:51:06,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:06,179 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-04-06 19:51:06,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 65 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:06,179 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-04-06 19:51:06,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 19:51:06,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:06,179 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:06,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 19:51:06,383 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,SelfDestructingSolverStorable64 [2022-04-06 19:51:06,384 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -312099040, now seen corresponding path program 121 times [2022-04-06 19:51:06,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:06,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [235854524] [2022-04-06 19:51:06,385 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:06,385 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash -312099040, now seen corresponding path program 122 times [2022-04-06 19:51:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:06,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070531515] [2022-04-06 19:51:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:07,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:07,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:07,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:07,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070531515] [2022-04-06 19:51:07,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070531515] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:07,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343086516] [2022-04-06 19:51:07,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:51:07,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:07,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:07,489 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 19:51:07,489 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 19:51:07,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:51:07,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:07,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 19:51:07,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:07,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:12,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343086516] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:12,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:12,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 134 [2022-04-06 19:51:12,540 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:12,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [235854524] [2022-04-06 19:51:12,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [235854524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:12,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:12,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 19:51:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100740042] [2022-04-06 19:51:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:12,541 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 19:51:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:12,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 19:51:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4619, Invalid=13203, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 19:51:12,542 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:16,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:16,328 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2022-04-06 19:51:16,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 19:51:16,329 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 19:51:16,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:16,329 INFO L225 Difference]: With dead ends: 150 [2022-04-06 19:51:16,329 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 19:51:16,331 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=9161, Invalid=29845, Unknown=0, NotChecked=0, Total=39006 [2022-04-06 19:51:16,331 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 8142 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 8271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 8142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:16,331 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 129 Invalid, 8271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 8142 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 19:51:16,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 19:51:16,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-04-06 19:51:16,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-04-06 19:51:16,346 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 139 [2022-04-06 19:51:16,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:16,347 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-04-06 19:51:16,347 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 66 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-04-06 19:51:16,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 19:51:16,347 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:16,347 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:16,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-04-06 19:51:16,551 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:16,551 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:16,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1632496963, now seen corresponding path program 123 times [2022-04-06 19:51:16,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:16,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1437400388] [2022-04-06 19:51:16,553 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:16,553 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:16,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1632496963, now seen corresponding path program 124 times [2022-04-06 19:51:16,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:16,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853334582] [2022-04-06 19:51:16,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:16,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:17,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:17,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853334582] [2022-04-06 19:51:17,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853334582] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854319938] [2022-04-06 19:51:17,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:51:17,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:17,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:17,735 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 19:51:17,735 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 19:51:17,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:51:17,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:17,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 135 conjunts are in the unsatisfiable core [2022-04-06 19:51:17,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:18,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:18,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 2144 refuted. 0 times theorem prover too weak. 2081 trivial. 0 not checked. [2022-04-06 19:51:18,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854319938] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:18,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:18,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 70, 6] total 74 [2022-04-06 19:51:18,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:18,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1437400388] [2022-04-06 19:51:18,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1437400388] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:18,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:18,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 19:51:18,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981972275] [2022-04-06 19:51:18,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:18,810 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 19:51:18,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 19:51:18,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=5126, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 19:51:18,811 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:22,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:22,149 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2022-04-06 19:51:22,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 19:51:22,149 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2022-04-06 19:51:22,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:22,150 INFO L225 Difference]: With dead ends: 152 [2022-04-06 19:51:22,150 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 19:51:22,151 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 276 SyntacticMatches, 3 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=728, Invalid=18454, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 19:51:22,152 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 8541 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 8672 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 8541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:22,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 249 Invalid, 8672 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 8541 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 19:51:22,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 19:51:22,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-04-06 19:51:22,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-04-06 19:51:22,168 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 141 [2022-04-06 19:51:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:22,168 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-04-06 19:51:22,168 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 67 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-04-06 19:51:22,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 19:51:22,169 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:22,169 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:22,184 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 19:51:22,391 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,SelfDestructingSolverStorable66 [2022-04-06 19:51:22,391 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:22,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:22,391 INFO L85 PathProgramCache]: Analyzing trace with hash 775418650, now seen corresponding path program 125 times [2022-04-06 19:51:22,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:22,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [889221015] [2022-04-06 19:51:22,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:22,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:22,393 INFO L85 PathProgramCache]: Analyzing trace with hash 775418650, now seen corresponding path program 126 times [2022-04-06 19:51:22,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:22,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467394142] [2022-04-06 19:51:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:22,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:22,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:23,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:23,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467394142] [2022-04-06 19:51:23,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467394142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:23,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952063473] [2022-04-06 19:51:23,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:51:23,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:23,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:23,693 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 19:51:23,696 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 19:51:23,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:51:23,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:23,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:51:23,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:23,984 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 19:51:23,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 195 proven. 1 refuted. 0 times theorem prover too weak. 4160 trivial. 0 not checked. [2022-04-06 19:51:24,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952063473] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:24,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:24,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 4, 4] total 73 [2022-04-06 19:51:24,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:24,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [889221015] [2022-04-06 19:51:24,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [889221015] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:24,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:24,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 19:51:24,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047638494] [2022-04-06 19:51:24,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:24,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 19:51:24,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:24,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 19:51:24,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=470, Invalid=4786, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 19:51:24,214 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:27,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:27,628 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2022-04-06 19:51:27,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 19:51:27,628 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-04-06 19:51:27,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:27,629 INFO L225 Difference]: With dead ends: 154 [2022-04-06 19:51:27,629 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 19:51:27,630 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 284 SyntacticMatches, 1 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1122, Invalid=18060, Unknown=0, NotChecked=0, Total=19182 [2022-04-06 19:51:27,630 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 74 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 8806 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 8939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 8806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:27,630 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 254 Invalid, 8939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 8806 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 19:51:27,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 19:51:27,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 146. [2022-04-06 19:51:27,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:27,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-04-06 19:51:27,648 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 143 [2022-04-06 19:51:27,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:27,648 INFO L478 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-04-06 19:51:27,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 68 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:27,648 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-04-06 19:51:27,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 19:51:27,649 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:27,649 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:27,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-04-06 19:51:27,855 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,SelfDestructingSolverStorable67 [2022-04-06 19:51:27,855 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:27,856 INFO L85 PathProgramCache]: Analyzing trace with hash -205049801, now seen corresponding path program 127 times [2022-04-06 19:51:27,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:27,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1253390082] [2022-04-06 19:51:27,857 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:27,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:27,857 INFO L85 PathProgramCache]: Analyzing trace with hash -205049801, now seen corresponding path program 128 times [2022-04-06 19:51:27,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:27,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15534052] [2022-04-06 19:51:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:27,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:27,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:29,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:29,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15534052] [2022-04-06 19:51:29,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15534052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:29,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589294108] [2022-04-06 19:51:29,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:51:29,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:29,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:29,587 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 19:51:29,588 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 19:51:29,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:51:29,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:29,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 139 conjunts are in the unsatisfiable core [2022-04-06 19:51:29,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:30,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:30,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:30,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 2277 refuted. 0 times theorem prover too weak. 2212 trivial. 0 not checked. [2022-04-06 19:51:30,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589294108] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:30,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:30,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 72, 6] total 76 [2022-04-06 19:51:30,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:30,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1253390082] [2022-04-06 19:51:30,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1253390082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:30,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:30,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 19:51:30,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404187621] [2022-04-06 19:51:30,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:30,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 19:51:30,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:30,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 19:51:30,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=5416, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:51:30,276 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:33,701 INFO L93 Difference]: Finished difference Result 156 states and 159 transitions. [2022-04-06 19:51:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 19:51:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 19:51:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:33,702 INFO L225 Difference]: With dead ends: 156 [2022-04-06 19:51:33,702 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 19:51:33,703 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 284 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2228 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=750, Invalid=19556, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 19:51:33,704 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 9117 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 9252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 9117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:33,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 294 Invalid, 9252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 9117 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 19:51:33,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 19:51:33,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-04-06 19:51:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-04-06 19:51:33,739 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 145 [2022-04-06 19:51:33,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:33,739 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-04-06 19:51:33,739 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 69 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:33,739 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-04-06 19:51:33,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-04-06 19:51:33,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:33,740 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:33,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-04-06 19:51:33,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 19:51:33,955 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:33,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1837393388, now seen corresponding path program 129 times [2022-04-06 19:51:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:33,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1222137097] [2022-04-06 19:51:33,957 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:33,957 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:33,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1837393388, now seen corresponding path program 130 times [2022-04-06 19:51:33,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:33,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718431308] [2022-04-06 19:51:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:35,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:35,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:35,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:35,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718431308] [2022-04-06 19:51:35,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718431308] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:35,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222006586] [2022-04-06 19:51:35,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:51:35,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:35,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:35,458 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 19:51:35,458 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 19:51:35,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:51:35,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:35,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-06 19:51:35,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:36,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222006586] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:44,358 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:44,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 71] total 141 [2022-04-06 19:51:44,358 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:44,358 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1222137097] [2022-04-06 19:51:44,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1222137097] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:44,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:44,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 19:51:44,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134288590] [2022-04-06 19:51:44,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:44,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 19:51:44,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:44,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 19:51:44,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5109, Invalid=14631, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 19:51:44,360 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:47,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:47,559 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-04-06 19:51:47,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 19:51:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-04-06 19:51:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:47,560 INFO L225 Difference]: With dead ends: 158 [2022-04-06 19:51:47,560 INFO L226 Difference]: Without dead ends: 150 [2022-04-06 19:51:47,562 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 225 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=10207, Invalid=33265, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 19:51:47,562 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 9168 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 9305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 9168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:47,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 114 Invalid, 9305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 9168 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 19:51:47,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-04-06 19:51:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-04-06 19:51:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.013793103448276) internal successors, (147), 145 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-04-06 19:51:47,585 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 147 [2022-04-06 19:51:47,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:47,585 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-04-06 19:51:47,586 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 70 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-04-06 19:51:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 19:51:47,586 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:47,586 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:47,630 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 19:51:47,802 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,SelfDestructingSolverStorable69 [2022-04-06 19:51:47,803 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:47,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:47,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1438449841, now seen corresponding path program 131 times [2022-04-06 19:51:47,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:47,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [115244075] [2022-04-06 19:51:47,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:47,804 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:47,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1438449841, now seen corresponding path program 132 times [2022-04-06 19:51:47,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:47,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870294395] [2022-04-06 19:51:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:47,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:49,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:49,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:49,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:49,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870294395] [2022-04-06 19:51:49,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870294395] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:49,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839810909] [2022-04-06 19:51:49,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:51:49,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:49,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:49,247 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 19:51:49,248 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 19:51:49,289 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:51:49,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:49,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:51:49,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:49,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 19:51:49,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:51:49,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 204 proven. 1 refuted. 0 times theorem prover too weak. 4556 trivial. 0 not checked. [2022-04-06 19:51:49,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839810909] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:51:49,679 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:51:49,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 4, 4] total 76 [2022-04-06 19:51:49,680 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:51:49,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [115244075] [2022-04-06 19:51:49,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [115244075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:51:49,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:51:49,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 19:51:49,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402038313] [2022-04-06 19:51:49,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:51:49,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 19:51:49,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:49,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 19:51:49,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=5209, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 19:51:49,681 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:53,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:51:53,704 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2022-04-06 19:51:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 19:51:53,704 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-04-06 19:51:53,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:51:53,708 INFO L225 Difference]: With dead ends: 160 [2022-04-06 19:51:53,708 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 19:51:53,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 296 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2350 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1173, Invalid=19707, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 19:51:53,709 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 9493 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 9632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 9493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:51:53,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 159 Invalid, 9632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 9493 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 19:51:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 19:51:53,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-04-06 19:51:53,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.0136054421768708) internal successors, (149), 147 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:53,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-04-06 19:51:53,718 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2022-04-06 19:51:53,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:51:53,718 INFO L478 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-04-06 19:51:53,718 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 71 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:51:53,718 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-04-06 19:51:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 19:51:53,718 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:51:53,718 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:51:53,755 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 19:51:53,934 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:53,934 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:51:53,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:51:53,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1312764942, now seen corresponding path program 133 times [2022-04-06 19:51:53,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:51:53,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871774672] [2022-04-06 19:51:53,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:51:53,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:51:53,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1312764942, now seen corresponding path program 134 times [2022-04-06 19:51:53,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:51:53,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862887810] [2022-04-06 19:51:53,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:51:53,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:51:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:55,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:51:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:51:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:55,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:51:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862887810] [2022-04-06 19:51:55,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862887810] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:51:55,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525580702] [2022-04-06 19:51:55,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:51:55,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:51:55,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:51:55,879 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 19:51:55,882 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 19:51:55,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:51:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:51:55,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 142 conjunts are in the unsatisfiable core [2022-04-06 19:51:55,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:51:56,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:51:56,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:05,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:05,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525580702] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:05,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:05,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 72, 73] total 145 [2022-04-06 19:52:05,118 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:05,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871774672] [2022-04-06 19:52:05,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871774672] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:05,118 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:05,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 19:52:05,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244160564] [2022-04-06 19:52:05,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:05,119 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 19:52:05,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:05,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 19:52:05,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5399, Invalid=15481, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 19:52:05,120 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:09,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:09,366 INFO L93 Difference]: Finished difference Result 162 states and 165 transitions. [2022-04-06 19:52:09,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 19:52:09,367 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 19:52:09,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:09,367 INFO L225 Difference]: With dead ends: 162 [2022-04-06 19:52:09,367 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 19:52:09,369 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=10787, Invalid=35223, Unknown=0, NotChecked=0, Total=46010 [2022-04-06 19:52:09,369 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 9858 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 9999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 9858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:09,369 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 234 Invalid, 9999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 9858 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 19:52:09,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 19:52:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-06 19:52:09,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:09,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-04-06 19:52:09,378 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 151 [2022-04-06 19:52:09,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:09,378 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-04-06 19:52:09,378 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 72 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:09,378 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-04-06 19:52:09,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2022-04-06 19:52:09,378 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:09,379 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:09,407 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 19:52:09,595 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:09,595 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:09,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:09,595 INFO L85 PathProgramCache]: Analyzing trace with hash 788661291, now seen corresponding path program 135 times [2022-04-06 19:52:09,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:09,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1853232677] [2022-04-06 19:52:09,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:09,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash 788661291, now seen corresponding path program 136 times [2022-04-06 19:52:09,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:09,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120263908] [2022-04-06 19:52:09,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:09,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:11,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:11,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:11,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:11,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120263908] [2022-04-06 19:52:11,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120263908] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:11,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253399941] [2022-04-06 19:52:11,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:52:11,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:11,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:11,556 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 19:52:11,556 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 19:52:11,611 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:52:11,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:11,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 147 conjunts are in the unsatisfiable core [2022-04-06 19:52:11,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:12,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:12,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:12,303 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 2555 refuted. 0 times theorem prover too weak. 2486 trivial. 0 not checked. [2022-04-06 19:52:12,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253399941] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:12,303 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:12,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 76, 6] total 80 [2022-04-06 19:52:12,303 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:12,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1853232677] [2022-04-06 19:52:12,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1853232677] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:12,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:12,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 19:52:12,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116243505] [2022-04-06 19:52:12,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:12,304 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 19:52:12,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:12,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 19:52:12,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=6020, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 19:52:12,304 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:15,682 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2022-04-06 19:52:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 19:52:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2022-04-06 19:52:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:15,683 INFO L225 Difference]: With dead ends: 164 [2022-04-06 19:52:15,683 INFO L226 Difference]: Without dead ends: 156 [2022-04-06 19:52:15,684 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 300 SyntacticMatches, 3 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2502 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=794, Invalid=21856, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 19:52:15,685 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 10089 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 10232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 10089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:15,685 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 194 Invalid, 10232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 10089 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 19:52:15,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-04-06 19:52:15,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2022-04-06 19:52:15,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-04-06 19:52:15,693 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 153 [2022-04-06 19:52:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:15,695 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-04-06 19:52:15,695 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 73 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-04-06 19:52:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 19:52:15,695 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:15,695 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:15,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:15,908 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:15,908 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:15,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:15,909 INFO L85 PathProgramCache]: Analyzing trace with hash -363773688, now seen corresponding path program 137 times [2022-04-06 19:52:15,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529584944] [2022-04-06 19:52:15,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:15,910 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:15,910 INFO L85 PathProgramCache]: Analyzing trace with hash -363773688, now seen corresponding path program 138 times [2022-04-06 19:52:15,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:15,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63645363] [2022-04-06 19:52:15,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:15,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:17,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:17,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63645363] [2022-04-06 19:52:17,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63645363] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271380981] [2022-04-06 19:52:17,651 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:52:17,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:17,652 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 19:52:17,653 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 19:52:17,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:52:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:17,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:52:17,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 19:52:17,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 213 proven. 1 refuted. 0 times theorem prover too weak. 4970 trivial. 0 not checked. [2022-04-06 19:52:18,127 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271380981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:18,127 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:18,127 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 4, 4] total 79 [2022-04-06 19:52:18,128 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:18,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529584944] [2022-04-06 19:52:18,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529584944] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:18,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:18,128 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 19:52:18,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513433541] [2022-04-06 19:52:18,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:18,128 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 19:52:18,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:18,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 19:52:18,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=5650, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 19:52:18,129 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:22,018 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2022-04-06 19:52:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 19:52:22,018 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-04-06 19:52:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:22,019 INFO L225 Difference]: With dead ends: 166 [2022-04-06 19:52:22,019 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 19:52:22,020 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2560 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1224, Invalid=21426, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 19:52:22,021 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 10438 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 10583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 10438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:22,021 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 249 Invalid, 10583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 10438 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 19:52:22,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 19:52:22,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-04-06 19:52:22,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0130718954248366) internal successors, (155), 153 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-04-06 19:52:22,029 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 155 [2022-04-06 19:52:22,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:22,030 INFO L478 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-04-06 19:52:22,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 74 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-04-06 19:52:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 19:52:22,030 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:22,030 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:22,036 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 19:52:22,234 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,SelfDestructingSolverStorable73 [2022-04-06 19:52:22,234 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:22,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:22,234 INFO L85 PathProgramCache]: Analyzing trace with hash 247773861, now seen corresponding path program 139 times [2022-04-06 19:52:22,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:22,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2114040626] [2022-04-06 19:52:22,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:22,235 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:22,235 INFO L85 PathProgramCache]: Analyzing trace with hash 247773861, now seen corresponding path program 140 times [2022-04-06 19:52:22,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:22,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273842671] [2022-04-06 19:52:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:22,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:23,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:23,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:23,671 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:23,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273842671] [2022-04-06 19:52:23,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273842671] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:23,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104979551] [2022-04-06 19:52:23,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:52:23,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:23,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:23,672 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 19:52:23,673 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 19:52:23,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:52:23,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:23,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 151 conjunts are in the unsatisfiable core [2022-04-06 19:52:23,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:24,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:24,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:24,692 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 2700 refuted. 0 times theorem prover too weak. 2629 trivial. 0 not checked. [2022-04-06 19:52:24,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104979551] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:24,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:24,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 78, 6] total 82 [2022-04-06 19:52:24,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:24,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2114040626] [2022-04-06 19:52:24,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2114040626] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:24,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:24,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 19:52:24,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495867324] [2022-04-06 19:52:24,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:24,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 19:52:24,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 19:52:24,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=6334, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:52:24,694 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:29,372 INFO L93 Difference]: Finished difference Result 168 states and 171 transitions. [2022-04-06 19:52:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 19:52:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 19:52:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:29,373 INFO L225 Difference]: With dead ends: 168 [2022-04-06 19:52:29,373 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 19:52:29,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 308 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2645 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=816, Invalid=23054, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 19:52:29,374 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 10491 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 10491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:29,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 54 Invalid, 10638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 10491 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 19:52:29,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 19:52:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-04-06 19:52:29,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-04-06 19:52:29,392 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 157 [2022-04-06 19:52:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:29,393 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-04-06 19:52:29,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 75 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-04-06 19:52:29,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-04-06 19:52:29,393 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:29,393 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:29,409 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 19:52:29,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:29,609 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:29,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash -465551102, now seen corresponding path program 141 times [2022-04-06 19:52:29,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:29,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [783443389] [2022-04-06 19:52:29,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:29,611 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:29,611 INFO L85 PathProgramCache]: Analyzing trace with hash -465551102, now seen corresponding path program 142 times [2022-04-06 19:52:29,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:29,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750125585] [2022-04-06 19:52:29,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:29,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:29,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:31,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:31,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:31,283 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:31,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:31,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750125585] [2022-04-06 19:52:31,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750125585] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:31,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805913869] [2022-04-06 19:52:31,283 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:52:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:31,284 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 19:52:31,285 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 19:52:31,366 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:52:31,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 151 conjunts are in the unsatisfiable core [2022-04-06 19:52:31,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:31,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:38,099 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:38,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805913869] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:38,100 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:38,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 154 [2022-04-06 19:52:38,100 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:38,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [783443389] [2022-04-06 19:52:38,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [783443389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:38,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:38,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 19:52:38,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188082362] [2022-04-06 19:52:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:38,100 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 19:52:38,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 19:52:38,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6079, Invalid=17483, Unknown=0, NotChecked=0, Total=23562 [2022-04-06 19:52:38,102 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:42,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:42,748 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-04-06 19:52:42,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 19:52:42,748 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-04-06 19:52:42,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:42,749 INFO L225 Difference]: With dead ends: 170 [2022-04-06 19:52:42,749 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 19:52:42,751 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2857 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=12071, Invalid=39685, Unknown=0, NotChecked=0, Total=51756 [2022-04-06 19:52:42,751 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 10824 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 10973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 10824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:42,751 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 89 Invalid, 10973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 10824 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 19:52:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 19:52:42,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 19:52:42,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 157 states have (on average 1.0127388535031847) internal successors, (159), 157 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:42,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-04-06 19:52:42,765 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 159 [2022-04-06 19:52:42,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:42,765 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-04-06 19:52:42,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 76 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-04-06 19:52:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 19:52:42,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:42,766 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:42,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:42,979 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:42,979 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:42,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:42,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1223926815, now seen corresponding path program 143 times [2022-04-06 19:52:42,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:42,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1127860233] [2022-04-06 19:52:42,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:42,985 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:42,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1223926815, now seen corresponding path program 144 times [2022-04-06 19:52:42,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:42,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385842226] [2022-04-06 19:52:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:42,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:43,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:44,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:44,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385842226] [2022-04-06 19:52:44,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385842226] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:44,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299657920] [2022-04-06 19:52:44,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:52:44,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:44,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:44,668 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 19:52:44,669 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 19:52:44,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:52:44,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:44,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:52:44,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 19:52:44,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:52:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 222 proven. 1 refuted. 0 times theorem prover too weak. 5402 trivial. 0 not checked. [2022-04-06 19:52:45,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299657920] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:52:45,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:52:45,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 4, 4] total 82 [2022-04-06 19:52:45,199 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:52:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1127860233] [2022-04-06 19:52:45,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1127860233] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:52:45,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:52:45,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 19:52:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090899357] [2022-04-06 19:52:45,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:52:45,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 19:52:45,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:45,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 19:52:45,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=6109, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 19:52:45,204 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:48,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:52:48,990 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2022-04-06 19:52:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 19:52:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-04-06 19:52:48,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:52:48,991 INFO L225 Difference]: With dead ends: 172 [2022-04-06 19:52:48,991 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 19:52:48,993 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 320 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2779 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1275, Invalid=23217, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 19:52:48,993 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 11077 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 11228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 11077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:52:48,994 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 54 Invalid, 11228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 11077 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 19:52:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 19:52:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-04-06 19:52:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0125786163522013) internal successors, (161), 159 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:49,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-04-06 19:52:49,031 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2022-04-06 19:52:49,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:52:49,031 INFO L478 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-04-06 19:52:49,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 77 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:52:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-04-06 19:52:49,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 19:52:49,032 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:52:49,032 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:52:49,047 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-04-06 19:52:49,247 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,SelfDestructingSolverStorable76 [2022-04-06 19:52:49,248 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:52:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:52:49,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1314567164, now seen corresponding path program 145 times [2022-04-06 19:52:49,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:52:49,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [200024931] [2022-04-06 19:52:49,249 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:52:49,249 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:52:49,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1314567164, now seen corresponding path program 146 times [2022-04-06 19:52:49,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:52:49,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959478934] [2022-04-06 19:52:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:52:49,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:52:49,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:50,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:52:50,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:52:50,691 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:50,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:52:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959478934] [2022-04-06 19:52:50,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959478934] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:52:50,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966833124] [2022-04-06 19:52:50,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:52:50,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:52:50,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:52:50,693 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 19:52:50,695 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 19:52:50,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:52:50,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:52:50,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 154 conjunts are in the unsatisfiable core [2022-04-06 19:52:50,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:52:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:52:51,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:00,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966833124] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:00,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:00,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 78, 79] total 157 [2022-04-06 19:53:00,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:00,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [200024931] [2022-04-06 19:53:00,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [200024931] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:00,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:00,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 19:53:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979209026] [2022-04-06 19:53:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:00,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 19:53:00,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:00,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 19:53:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6317, Invalid=18175, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 19:53:00,951 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:04,713 INFO L93 Difference]: Finished difference Result 174 states and 177 transitions. [2022-04-06 19:53:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 19:53:04,714 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-04-06 19:53:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:04,714 INFO L225 Difference]: With dead ends: 174 [2022-04-06 19:53:04,714 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 19:53:04,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=12623, Invalid=41433, Unknown=0, NotChecked=0, Total=54056 [2022-04-06 19:53:04,717 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11346 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 11346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:04,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 29 Invalid, 11499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 11346 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 19:53:04,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 19:53:04,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-04-06 19:53:04,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:04,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-04-06 19:53:04,727 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 163 [2022-04-06 19:53:04,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:04,727 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-04-06 19:53:04,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 78 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:04,727 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-04-06 19:53:04,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2022-04-06 19:53:04,727 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:04,727 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:04,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-04-06 19:53:04,943 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,SelfDestructingSolverStorable77 [2022-04-06 19:53:04,943 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:04,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:04,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1774370663, now seen corresponding path program 147 times [2022-04-06 19:53:04,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:04,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [572319484] [2022-04-06 19:53:04,944 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:04,944 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:04,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1774370663, now seen corresponding path program 148 times [2022-04-06 19:53:04,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:04,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347236267] [2022-04-06 19:53:04,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:04,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:06,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:06,833 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:06,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347236267] [2022-04-06 19:53:06,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347236267] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:06,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811070354] [2022-04-06 19:53:06,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:53:06,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:06,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:06,834 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 19:53:06,835 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 19:53:06,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:53:06,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:06,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 159 conjunts are in the unsatisfiable core [2022-04-06 19:53:06,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:07,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:07,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 3002 refuted. 0 times theorem prover too weak. 2927 trivial. 0 not checked. [2022-04-06 19:53:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811070354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:07,573 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:07,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 82, 6] total 86 [2022-04-06 19:53:07,573 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:07,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [572319484] [2022-04-06 19:53:07,573 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [572319484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:07,573 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:07,573 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 19:53:07,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037572761] [2022-04-06 19:53:07,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:07,573 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 19:53:07,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 19:53:07,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=6986, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 19:53:07,574 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:12,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:12,674 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2022-04-06 19:53:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 19:53:12,674 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 165 [2022-04-06 19:53:12,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:12,691 INFO L225 Difference]: With dead ends: 176 [2022-04-06 19:53:12,691 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 19:53:12,693 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 324 SyntacticMatches, 3 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2943 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=860, Invalid=25546, Unknown=0, NotChecked=0, Total=26406 [2022-04-06 19:53:12,693 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11649 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 11649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:12,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 29 Invalid, 11804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 11649 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 19:53:12,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 19:53:12,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-04-06 19:53:12,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:12,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-04-06 19:53:12,711 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 165 [2022-04-06 19:53:12,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:12,711 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-04-06 19:53:12,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 79 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:12,712 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-04-06 19:53:12,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 19:53:12,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:12,712 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:12,736 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2022-04-06 19:53:12,929 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:12,929 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:12,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:12,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1873746422, now seen corresponding path program 149 times [2022-04-06 19:53:12,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:12,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [637131493] [2022-04-06 19:53:12,930 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:12,930 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:12,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1873746422, now seen corresponding path program 150 times [2022-04-06 19:53:12,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:12,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407329117] [2022-04-06 19:53:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:12,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:14,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:14,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:14,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407329117] [2022-04-06 19:53:14,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407329117] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:14,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631283910] [2022-04-06 19:53:14,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:53:14,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:14,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:14,404 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 19:53:14,405 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 19:53:14,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:53:14,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:14,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:53:14,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 19:53:14,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:15,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 231 proven. 1 refuted. 0 times theorem prover too weak. 5852 trivial. 0 not checked. [2022-04-06 19:53:15,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631283910] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:15,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:15,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 4, 8] total 89 [2022-04-06 19:53:15,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:15,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [637131493] [2022-04-06 19:53:15,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [637131493] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:15,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:15,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 19:53:15,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818052034] [2022-04-06 19:53:15,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:15,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 19:53:15,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:15,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 19:53:15,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=7221, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 19:53:15,066 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:19,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:19,948 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-04-06 19:53:19,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 19:53:19,948 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-04-06 19:53:19,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:19,949 INFO L225 Difference]: With dead ends: 178 [2022-04-06 19:53:19,949 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 19:53:19,951 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3013 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1426, Invalid=26296, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 19:53:19,951 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 86 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 12286 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 12443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 12286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:19,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 304 Invalid, 12443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 12286 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 19:53:19,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 19:53:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-04-06 19:53:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0121212121212122) internal successors, (167), 165 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:19,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-04-06 19:53:19,960 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 167 [2022-04-06 19:53:19,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:19,960 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-04-06 19:53:19,961 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 80 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:19,961 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-04-06 19:53:19,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 19:53:19,961 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:19,961 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:19,969 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 19:53:20,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:20,165 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:20,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:20,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1274015725, now seen corresponding path program 151 times [2022-04-06 19:53:20,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:20,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1453532343] [2022-04-06 19:53:20,166 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:20,166 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:20,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1274015725, now seen corresponding path program 152 times [2022-04-06 19:53:20,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:20,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56979433] [2022-04-06 19:53:20,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:20,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:22,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:22,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56979433] [2022-04-06 19:53:22,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56979433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:22,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897776281] [2022-04-06 19:53:22,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:53:22,311 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:22,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:22,312 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 19:53:22,313 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 19:53:22,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:53:22,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:22,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 19:53:22,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:23,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:23,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 3159 refuted. 0 times theorem prover too weak. 3082 trivial. 0 not checked. [2022-04-06 19:53:23,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897776281] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:23,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:23,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 84, 6] total 88 [2022-04-06 19:53:23,446 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1453532343] [2022-04-06 19:53:23,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1453532343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:23,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:23,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 19:53:23,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133844814] [2022-04-06 19:53:23,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:23,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 19:53:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:23,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 19:53:23,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=7324, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 19:53:23,447 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:27,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:27,579 INFO L93 Difference]: Finished difference Result 180 states and 183 transitions. [2022-04-06 19:53:27,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 19:53:27,580 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-04-06 19:53:27,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:27,580 INFO L225 Difference]: With dead ends: 180 [2022-04-06 19:53:27,580 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 19:53:27,581 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 332 SyntacticMatches, 3 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3098 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=882, Invalid=26840, Unknown=0, NotChecked=0, Total=27722 [2022-04-06 19:53:27,581 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 12603 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 12762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 12603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:27,581 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 309 Invalid, 12762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 12603 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 19:53:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 19:53:27,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2022-04-06 19:53:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:27,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-04-06 19:53:27,591 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 169 [2022-04-06 19:53:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:27,591 INFO L478 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-04-06 19:53:27,591 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 81 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:27,591 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-04-06 19:53:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-04-06 19:53:27,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:27,592 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:27,607 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 19:53:27,800 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:27,801 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:27,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1678504688, now seen corresponding path program 153 times [2022-04-06 19:53:27,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:27,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [552148340] [2022-04-06 19:53:27,802 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:27,802 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1678504688, now seen corresponding path program 154 times [2022-04-06 19:53:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:27,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072730688] [2022-04-06 19:53:27,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:27,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:30,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:30,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:30,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072730688] [2022-04-06 19:53:30,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072730688] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:30,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577710829] [2022-04-06 19:53:30,368 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:53:30,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:30,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:30,369 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 19:53:30,369 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 19:53:30,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:53:30,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:30,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 19:53:30,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:31,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:39,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577710829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:39,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:39,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83, 83] total 166 [2022-04-06 19:53:39,487 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:39,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [552148340] [2022-04-06 19:53:39,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [552148340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:39,487 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:39,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-04-06 19:53:39,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651611334] [2022-04-06 19:53:39,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:39,488 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-04-06 19:53:39,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:39,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-04-06 19:53:39,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7051, Invalid=20339, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 19:53:39,489 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:43,895 INFO L93 Difference]: Finished difference Result 182 states and 185 transitions. [2022-04-06 19:53:43,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-04-06 19:53:43,895 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-04-06 19:53:43,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:43,896 INFO L225 Difference]: With dead ends: 182 [2022-04-06 19:53:43,896 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 19:53:43,898 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 260 SyntacticMatches, 2 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3328 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=14009, Invalid=46261, Unknown=0, NotChecked=0, Total=60270 [2022-04-06 19:53:43,899 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 88 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 12696 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 12857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 12696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:43,899 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 124 Invalid, 12857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 12696 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:53:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 19:53:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2022-04-06 19:53:43,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 169 states have (on average 1.0118343195266273) internal successors, (171), 169 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-04-06 19:53:43,908 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 171 [2022-04-06 19:53:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:43,908 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-04-06 19:53:43,909 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 82 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:43,909 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-04-06 19:53:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 19:53:43,909 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:43,909 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:43,926 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 19:53:44,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:44,125 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:44,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:44,126 INFO L85 PathProgramCache]: Analyzing trace with hash 77238925, now seen corresponding path program 155 times [2022-04-06 19:53:44,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:44,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603641687] [2022-04-06 19:53:44,127 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:44,127 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:44,127 INFO L85 PathProgramCache]: Analyzing trace with hash 77238925, now seen corresponding path program 156 times [2022-04-06 19:53:44,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:44,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219708336] [2022-04-06 19:53:44,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:44,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:44,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:46,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:46,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219708336] [2022-04-06 19:53:46,160 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219708336] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:46,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746801981] [2022-04-06 19:53:46,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:53:46,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:46,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:46,161 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 19:53:46,162 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 19:53:46,202 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:53:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:46,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:53:46,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 19:53:46,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:53:46,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 240 proven. 1 refuted. 0 times theorem prover too weak. 6320 trivial. 0 not checked. [2022-04-06 19:53:46,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746801981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:53:46,700 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:53:46,700 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 4, 5] total 89 [2022-04-06 19:53:46,701 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:53:46,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603641687] [2022-04-06 19:53:46,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603641687] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:53:46,701 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:53:46,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-04-06 19:53:46,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994398711] [2022-04-06 19:53:46,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:53:46,701 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-04-06 19:53:46,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:46,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-04-06 19:53:46,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=7248, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 19:53:46,702 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:51,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:53:51,346 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2022-04-06 19:53:51,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-04-06 19:53:51,347 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-04-06 19:53:51,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:53:51,347 INFO L225 Difference]: With dead ends: 184 [2022-04-06 19:53:51,347 INFO L226 Difference]: Without dead ends: 176 [2022-04-06 19:53:51,349 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 343 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3244 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1390, Invalid=27340, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 19:53:51,349 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 89 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 13267 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 13430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 13267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:53:51,349 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 334 Invalid, 13430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 13267 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-04-06 19:53:51,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-04-06 19:53:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-04-06 19:53:51,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:51,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-04-06 19:53:51,364 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2022-04-06 19:53:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:53:51,365 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-04-06 19:53:51,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 83 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:53:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-04-06 19:53:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 19:53:51,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:53:51,365 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:53:51,381 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 19:53:51,579 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:51,579 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:53:51,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:53:51,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1140867350, now seen corresponding path program 157 times [2022-04-06 19:53:51,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:53:51,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [592665702] [2022-04-06 19:53:51,581 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:53:51,581 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:53:51,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1140867350, now seen corresponding path program 158 times [2022-04-06 19:53:51,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:53:51,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748300176] [2022-04-06 19:53:51,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:53:51,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:53:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:53,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:53:53,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:53:53,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:53,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:53:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748300176] [2022-04-06 19:53:53,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748300176] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:53:53,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111596471] [2022-04-06 19:53:53,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:53:53,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:53:53,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:53:53,270 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 19:53:53,270 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 19:53:53,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:53:53,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:53:53,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 167 conjunts are in the unsatisfiable core [2022-04-06 19:53:53,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:53:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:53:53,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:02,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111596471] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:02,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:02,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85, 85] total 170 [2022-04-06 19:54:02,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:02,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [592665702] [2022-04-06 19:54:02,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [592665702] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:02,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:02,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-04-06 19:54:02,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137274552] [2022-04-06 19:54:02,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:02,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-04-06 19:54:02,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-04-06 19:54:02,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7391, Invalid=21339, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 19:54:02,408 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:08,496 INFO L93 Difference]: Finished difference Result 186 states and 189 transitions. [2022-04-06 19:54:08,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-04-06 19:54:08,497 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 19:54:08,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:08,497 INFO L225 Difference]: With dead ends: 186 [2022-04-06 19:54:08,497 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 19:54:08,500 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=14687, Invalid=48565, Unknown=0, NotChecked=0, Total=63252 [2022-04-06 19:54:08,500 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 13488 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 13653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 13488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:08,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 249 Invalid, 13653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 13488 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 19:54:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 19:54:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2022-04-06 19:54:08,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:08,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-04-06 19:54:08,515 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 175 [2022-04-06 19:54:08,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:08,515 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-04-06 19:54:08,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 84 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-04-06 19:54:08,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-04-06 19:54:08,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:08,516 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:08,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-04-06 19:54:08,729 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,SelfDestructingSolverStorable83 [2022-04-06 19:54:08,730 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:08,730 INFO L85 PathProgramCache]: Analyzing trace with hash 785074183, now seen corresponding path program 159 times [2022-04-06 19:54:08,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:08,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [296436283] [2022-04-06 19:54:08,731 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:08,731 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash 785074183, now seen corresponding path program 160 times [2022-04-06 19:54:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:08,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470959] [2022-04-06 19:54:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:08,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:08,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:10,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:10,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:10,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:10,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470959] [2022-04-06 19:54:10,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470959] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:10,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375642160] [2022-04-06 19:54:10,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:54:10,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:10,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:10,722 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 19:54:10,723 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 19:54:10,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:54:10,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:10,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 171 conjunts are in the unsatisfiable core [2022-04-06 19:54:10,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:11,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:11,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 3485 refuted. 0 times theorem prover too weak. 3404 trivial. 0 not checked. [2022-04-06 19:54:11,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375642160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:11,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:11,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 88, 6] total 92 [2022-04-06 19:54:11,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:11,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [296436283] [2022-04-06 19:54:11,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [296436283] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:11,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:11,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-04-06 19:54:11,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133450985] [2022-04-06 19:54:11,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:11,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-04-06 19:54:11,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:11,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-04-06 19:54:11,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=8024, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 19:54:11,648 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:15,999 INFO L93 Difference]: Finished difference Result 188 states and 191 transitions. [2022-04-06 19:54:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-04-06 19:54:15,999 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 177 [2022-04-06 19:54:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:16,000 INFO L225 Difference]: With dead ends: 188 [2022-04-06 19:54:16,000 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 19:54:16,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 348 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3420 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=926, Invalid=29524, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 19:54:16,002 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 13641 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 13808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 13641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:16,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 104 Invalid, 13808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 13641 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 19:54:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 19:54:16,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-04-06 19:54:16,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:16,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-04-06 19:54:16,012 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 177 [2022-04-06 19:54:16,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:16,012 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-04-06 19:54:16,012 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 85 states have internal predecessors, (173), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:16,012 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-04-06 19:54:16,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 19:54:16,013 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:16,013 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:16,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 19:54:16,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:16,218 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash 483982820, now seen corresponding path program 161 times [2022-04-06 19:54:16,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:16,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1066897890] [2022-04-06 19:54:16,220 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:16,220 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:16,220 INFO L85 PathProgramCache]: Analyzing trace with hash 483982820, now seen corresponding path program 162 times [2022-04-06 19:54:16,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:16,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131041197] [2022-04-06 19:54:16,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:16,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:18,229 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:18,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:18,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131041197] [2022-04-06 19:54:18,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131041197] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:18,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87752809] [2022-04-06 19:54:18,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:54:18,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:18,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:18,232 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 19:54:18,232 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 19:54:18,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:54:18,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:18,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:54:18,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 19:54:18,473 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 249 proven. 1 refuted. 0 times theorem prover too weak. 6806 trivial. 0 not checked. [2022-04-06 19:54:18,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87752809] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:18,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:18,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 4, 4] total 91 [2022-04-06 19:54:18,651 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:18,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1066897890] [2022-04-06 19:54:18,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1066897890] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:18,656 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:18,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-04-06 19:54:18,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281121824] [2022-04-06 19:54:18,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:18,656 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-04-06 19:54:18,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:18,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-04-06 19:54:18,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=596, Invalid=7594, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 19:54:18,658 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:23,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:23,812 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2022-04-06 19:54:23,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-04-06 19:54:23,812 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-04-06 19:54:23,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:23,815 INFO L225 Difference]: With dead ends: 190 [2022-04-06 19:54:23,815 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 19:54:23,818 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 530 GetRequests, 356 SyntacticMatches, 1 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3490 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1428, Invalid=29022, Unknown=0, NotChecked=0, Total=30450 [2022-04-06 19:54:23,819 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 92 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 13966 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 14135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 13966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:23,819 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 99 Invalid, 14135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 13966 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 19:54:23,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 19:54:23,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 19:54:23,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-04-06 19:54:23,839 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 179 [2022-04-06 19:54:23,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:23,840 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-04-06 19:54:23,840 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 86 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:23,840 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-04-06 19:54:23,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 19:54:23,841 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:23,841 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:23,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-04-06 19:54:24,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:24,054 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1102008191, now seen corresponding path program 163 times [2022-04-06 19:54:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282591716] [2022-04-06 19:54:24,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:24,055 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1102008191, now seen corresponding path program 164 times [2022-04-06 19:54:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:24,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623984072] [2022-04-06 19:54:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:24,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:26,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:26,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623984072] [2022-04-06 19:54:26,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623984072] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:26,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422402424] [2022-04-06 19:54:26,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:54:26,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:26,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:26,237 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 19:54:26,238 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 19:54:26,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:54:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:26,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 175 conjunts are in the unsatisfiable core [2022-04-06 19:54:26,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:26,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:27,322 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 3654 refuted. 0 times theorem prover too weak. 3571 trivial. 0 not checked. [2022-04-06 19:54:27,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422402424] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:27,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:27,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 90, 6] total 94 [2022-04-06 19:54:27,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:27,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282591716] [2022-04-06 19:54:27,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282591716] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:27,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:27,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-04-06 19:54:27,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358161232] [2022-04-06 19:54:27,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:27,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-04-06 19:54:27,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:27,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-04-06 19:54:27,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=8386, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 19:54:27,324 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:32,141 INFO L93 Difference]: Finished difference Result 192 states and 195 transitions. [2022-04-06 19:54:32,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-04-06 19:54:32,141 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-04-06 19:54:32,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:32,142 INFO L225 Difference]: With dead ends: 192 [2022-04-06 19:54:32,142 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 19:54:32,143 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 536 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3587 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=948, Invalid=30914, Unknown=0, NotChecked=0, Total=31862 [2022-04-06 19:54:32,143 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 14655 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 14826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 14655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:32,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 394 Invalid, 14826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 14655 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 19:54:32,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 19:54:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-04-06 19:54:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:32,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-04-06 19:54:32,153 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 181 [2022-04-06 19:54:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:32,153 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-04-06 19:54:32,153 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 87 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:32,154 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-04-06 19:54:32,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-04-06 19:54:32,154 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:32,154 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:32,173 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 19:54:32,367 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:32,367 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash -525979682, now seen corresponding path program 165 times [2022-04-06 19:54:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1178576151] [2022-04-06 19:54:32,369 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:32,369 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -525979682, now seen corresponding path program 166 times [2022-04-06 19:54:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:32,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633918420] [2022-04-06 19:54:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:32,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:34,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:34,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:34,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633918420] [2022-04-06 19:54:34,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633918420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:34,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081575117] [2022-04-06 19:54:34,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:54:34,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:34,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:34,237 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 19:54:34,237 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 19:54:34,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:54:34,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:34,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 175 conjunts are in the unsatisfiable core [2022-04-06 19:54:34,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:34,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:34,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:42,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081575117] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:42,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89, 89] total 178 [2022-04-06 19:54:42,988 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:42,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1178576151] [2022-04-06 19:54:42,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1178576151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:42,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:42,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-04-06 19:54:42,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928670118] [2022-04-06 19:54:42,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:42,989 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-04-06 19:54:42,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:42,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-04-06 19:54:42,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8095, Invalid=23411, Unknown=0, NotChecked=0, Total=31506 [2022-04-06 19:54:42,991 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:47,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:47,528 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2022-04-06 19:54:47,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-04-06 19:54:47,528 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-04-06 19:54:47,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:47,528 INFO L225 Difference]: With dead ends: 194 [2022-04-06 19:54:47,528 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 19:54:47,531 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 278 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3835 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=16091, Invalid=53341, Unknown=0, NotChecked=0, Total=69432 [2022-04-06 19:54:47,531 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 14646 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 14819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 14646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:47,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 104 Invalid, 14819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 14646 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 19:54:47,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 19:54:47,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 19:54:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.011049723756906) internal successors, (183), 181 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:47,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-04-06 19:54:47,542 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 183 [2022-04-06 19:54:47,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:47,542 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-04-06 19:54:47,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 88 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:47,542 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-04-06 19:54:47,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 19:54:47,542 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:47,542 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:47,560 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 19:54:47,747 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:47,747 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:47,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1013363717, now seen corresponding path program 167 times [2022-04-06 19:54:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:47,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [501634756] [2022-04-06 19:54:47,750 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:47,750 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:47,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1013363717, now seen corresponding path program 168 times [2022-04-06 19:54:47,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:47,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68622047] [2022-04-06 19:54:47,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:47,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:47,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:49,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:49,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:49,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68622047] [2022-04-06 19:54:49,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68622047] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:49,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108225350] [2022-04-06 19:54:49,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:54:49,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:49,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:49,612 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 19:54:49,613 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 19:54:49,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:54:49,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:49,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:54:49,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:49,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 19:54:49,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:54:50,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 258 proven. 1 refuted. 0 times theorem prover too weak. 7310 trivial. 0 not checked. [2022-04-06 19:54:50,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108225350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:54:50,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:54:50,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 4, 5] total 95 [2022-04-06 19:54:50,259 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:54:50,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [501634756] [2022-04-06 19:54:50,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [501634756] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:54:50,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:54:50,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-04-06 19:54:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585791395] [2022-04-06 19:54:50,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:54:50,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-04-06 19:54:50,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-04-06 19:54:50,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=626, Invalid=8304, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 19:54:50,260 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:55,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:54:55,913 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2022-04-06 19:54:55,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-04-06 19:54:55,914 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-04-06 19:54:55,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:54:55,914 INFO L225 Difference]: With dead ends: 196 [2022-04-06 19:54:55,914 INFO L226 Difference]: Without dead ends: 188 [2022-04-06 19:54:55,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 548 GetRequests, 367 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3745 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1492, Invalid=31450, Unknown=0, NotChecked=0, Total=32942 [2022-04-06 19:54:55,916 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 14959 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 15134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 14959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:54:55,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 79 Invalid, 15134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 14959 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 19:54:55,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-04-06 19:54:55,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-04-06 19:54:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.010928961748634) internal successors, (185), 183 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-04-06 19:54:55,929 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2022-04-06 19:54:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:54:55,930 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-04-06 19:54:55,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 89 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:54:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-04-06 19:54:55,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 19:54:55,930 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:54:55,931 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:54:55,934 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-04-06 19:54:56,134 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:56,135 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:54:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:54:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1237986088, now seen corresponding path program 169 times [2022-04-06 19:54:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:54:56,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [807059290] [2022-04-06 19:54:56,136 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:54:56,136 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:54:56,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1237986088, now seen corresponding path program 170 times [2022-04-06 19:54:56,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:54:56,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445991360] [2022-04-06 19:54:56,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:54:56,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:54:56,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:58,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:54:58,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:54:58,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:58,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:54:58,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445991360] [2022-04-06 19:54:58,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445991360] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:54:58,118 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021057665] [2022-04-06 19:54:58,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:54:58,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:54:58,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:54:58,119 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 19:54:58,120 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 19:54:58,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:54:58,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:54:58,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 178 conjunts are in the unsatisfiable core [2022-04-06 19:54:58,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:54:58,726 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:54:58,727 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:10,747 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021057665] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:10,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:10,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 90, 91] total 181 [2022-04-06 19:55:10,747 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:10,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [807059290] [2022-04-06 19:55:10,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [807059290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:10,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:10,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-04-06 19:55:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476973564] [2022-04-06 19:55:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:10,748 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-04-06 19:55:10,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:10,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-04-06 19:55:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8369, Invalid=24211, Unknown=0, NotChecked=0, Total=32580 [2022-04-06 19:55:10,750 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:16,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:16,213 INFO L93 Difference]: Finished difference Result 198 states and 201 transitions. [2022-04-06 19:55:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-04-06 19:55:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-04-06 19:55:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:16,214 INFO L225 Difference]: With dead ends: 198 [2022-04-06 19:55:16,214 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 19:55:16,216 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 285 SyntacticMatches, 2 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=16727, Invalid=55365, Unknown=0, NotChecked=0, Total=72092 [2022-04-06 19:55:16,216 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 15558 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 15735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 15558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:16,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 289 Invalid, 15735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 15558 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 19:55:16,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 19:55:16,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-04-06 19:55:16,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:16,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-04-06 19:55:16,226 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 187 [2022-04-06 19:55:16,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:16,227 INFO L478 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-04-06 19:55:16,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 90 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:16,227 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-04-06 19:55:16,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 19:55:16,227 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:16,227 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:16,246 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 19:55:16,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-04-06 19:55:16,443 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1943247477, now seen corresponding path program 171 times [2022-04-06 19:55:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [277798530] [2022-04-06 19:55:16,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:55:16,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:16,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1943247477, now seen corresponding path program 172 times [2022-04-06 19:55:16,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:16,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388879648] [2022-04-06 19:55:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:16,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:18,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 89 proven. 7832 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:18,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:18,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388879648] [2022-04-06 19:55:18,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388879648] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:18,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578945380] [2022-04-06 19:55:18,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:55:18,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:18,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:18,860 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 19:55:18,860 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 19:55:18,933 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:55:18,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:18,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 183 conjunts are in the unsatisfiable core [2022-04-06 19:55:18,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:19,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:19,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 4004 refuted. 0 times theorem prover too weak. 3917 trivial. 0 not checked. [2022-04-06 19:55:19,991 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578945380] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:19,991 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:19,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 94, 6] total 98 [2022-04-06 19:55:19,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:19,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [277798530] [2022-04-06 19:55:19,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [277798530] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:19,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:19,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-04-06 19:55:19,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251943637] [2022-04-06 19:55:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:19,992 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-04-06 19:55:19,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:19,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-04-06 19:55:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=9134, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 19:55:19,993 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:25,161 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2022-04-06 19:55:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-04-06 19:55:25,161 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-04-06 19:55:25,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:25,162 INFO L225 Difference]: With dead ends: 200 [2022-04-06 19:55:25,162 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 19:55:25,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 372 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3933 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=992, Invalid=33790, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 19:55:25,163 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 16059 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 16238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 16059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:25,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 414 Invalid, 16238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 16059 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 19:55:25,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 19:55:25,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-04-06 19:55:25,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:25,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-04-06 19:55:25,177 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 189 [2022-04-06 19:55:25,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:25,177 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-04-06 19:55:25,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 91 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:25,177 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-04-06 19:55:25,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 19:55:25,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:25,177 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:25,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 19:55:25,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:25,391 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:25,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:25,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1091988690, now seen corresponding path program 173 times [2022-04-06 19:55:25,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:25,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1180747786] [2022-04-06 19:55:25,393 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:55:25,393 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:25,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1091988690, now seen corresponding path program 174 times [2022-04-06 19:55:25,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:25,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500425458] [2022-04-06 19:55:25,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:25,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:27,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:27,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 90 proven. 8010 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:27,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500425458] [2022-04-06 19:55:27,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500425458] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:27,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088550617] [2022-04-06 19:55:27,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:55:27,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:27,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:27,731 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 19:55:27,731 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 19:55:27,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:55:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:55:27,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 19:55:27,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:28,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 267 proven. 1 refuted. 0 times theorem prover too weak. 7832 trivial. 0 not checked. [2022-04-06 19:55:28,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088550617] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:28,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:28,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 4, 4] total 97 [2022-04-06 19:55:28,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:28,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1180747786] [2022-04-06 19:55:28,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1180747786] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:28,176 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:28,176 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-04-06 19:55:28,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039904114] [2022-04-06 19:55:28,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:28,176 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-04-06 19:55:28,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:28,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-04-06 19:55:28,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=638, Invalid=8674, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 19:55:28,177 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:33,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:33,251 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2022-04-06 19:55:33,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-04-06 19:55:33,252 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-04-06 19:55:33,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:33,252 INFO L225 Difference]: With dead ends: 202 [2022-04-06 19:55:33,252 INFO L226 Difference]: Without dead ends: 194 [2022-04-06 19:55:33,254 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 380 SyntacticMatches, 1 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4009 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1530, Invalid=33252, Unknown=0, NotChecked=0, Total=34782 [2022-04-06 19:55:33,254 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 98 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 16324 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 16505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 16324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:33,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 339 Invalid, 16505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 16324 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 19:55:33,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-04-06 19:55:33,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-04-06 19:55:33,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0105820105820107) internal successors, (191), 189 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:33,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-04-06 19:55:33,264 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 191 [2022-04-06 19:55:33,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:33,265 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-04-06 19:55:33,265 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 92 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:33,265 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-04-06 19:55:33,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 19:55:33,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:33,265 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:33,280 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 19:55:33,480 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:33,480 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:33,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:33,481 INFO L85 PathProgramCache]: Analyzing trace with hash -923919377, now seen corresponding path program 175 times [2022-04-06 19:55:33,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:33,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132987087] [2022-04-06 19:55:33,482 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:55:33,482 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:33,482 INFO L85 PathProgramCache]: Analyzing trace with hash -923919377, now seen corresponding path program 176 times [2022-04-06 19:55:33,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:33,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272502600] [2022-04-06 19:55:33,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:33,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:33,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:36,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:36,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:36,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 91 proven. 8190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:36,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272502600] [2022-04-06 19:55:36,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272502600] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:36,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693062241] [2022-04-06 19:55:36,275 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:55:36,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:36,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:36,276 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 19:55:36,276 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 19:55:36,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:55:36,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:36,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 187 conjunts are in the unsatisfiable core [2022-04-06 19:55:36,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:37,022 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 4185 refuted. 0 times theorem prover too weak. 4096 trivial. 0 not checked. [2022-04-06 19:55:37,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693062241] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:37,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:37,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 96, 6] total 100 [2022-04-06 19:55:37,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:37,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132987087] [2022-04-06 19:55:37,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132987087] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:37,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:37,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-04-06 19:55:37,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843193736] [2022-04-06 19:55:37,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:37,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-04-06 19:55:37,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:37,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-04-06 19:55:37,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=9520, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:55:37,410 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:42,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:55:42,379 INFO L93 Difference]: Finished difference Result 204 states and 207 transitions. [2022-04-06 19:55:42,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-04-06 19:55:42,379 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 19:55:42,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:55:42,380 INFO L225 Difference]: With dead ends: 204 [2022-04-06 19:55:42,380 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 19:55:42,381 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 380 SyntacticMatches, 3 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4112 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1014, Invalid=35276, Unknown=0, NotChecked=0, Total=36290 [2022-04-06 19:55:42,381 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 16473 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 16656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 16473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:55:42,381 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 164 Invalid, 16656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 16473 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 19:55:42,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 19:55:42,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2022-04-06 19:55:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:42,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-04-06 19:55:42,393 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 193 [2022-04-06 19:55:42,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:55:42,393 INFO L478 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-04-06 19:55:42,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 93 states have internal predecessors, (189), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:55:42,393 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-04-06 19:55:42,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-04-06 19:55:42,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:55:42,394 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:55:42,410 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 19:55:42,609 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:42,610 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:55:42,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:55:42,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1181321268, now seen corresponding path program 177 times [2022-04-06 19:55:42,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:42,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1081377189] [2022-04-06 19:55:42,611 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:55:42,611 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:55:42,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1181321268, now seen corresponding path program 178 times [2022-04-06 19:55:42,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:55:42,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377202509] [2022-04-06 19:55:42,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:55:42,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:55:42,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:44,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:55:44,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:55:44,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 92 proven. 8372 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:44,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:55:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377202509] [2022-04-06 19:55:44,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377202509] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:55:44,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783214908] [2022-04-06 19:55:44,792 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:55:44,792 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:55:44,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:55:44,793 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 19:55:44,794 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 19:55:44,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:55:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:55:44,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 187 conjunts are in the unsatisfiable core [2022-04-06 19:55:44,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:55:45,330 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:45,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:55:55,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:55:55,713 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783214908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:55:55,713 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:55:55,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95, 95] total 190 [2022-04-06 19:55:55,713 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:55:55,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1081377189] [2022-04-06 19:55:55,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1081377189] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:55:55,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:55:55,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-04-06 19:55:55,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113484784] [2022-04-06 19:55:55,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:55:55,714 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-04-06 19:55:55,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:55:55,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-04-06 19:55:55,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9211, Invalid=26699, Unknown=0, NotChecked=0, Total=35910 [2022-04-06 19:55:55,716 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:01,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:01,433 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2022-04-06 19:56:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-04-06 19:56:01,433 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-04-06 19:56:01,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:01,433 INFO L225 Difference]: With dead ends: 206 [2022-04-06 19:56:01,434 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 19:56:01,436 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 578 GetRequests, 296 SyntacticMatches, 2 SemanticMatches, 280 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4378 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=18317, Invalid=60925, Unknown=0, NotChecked=0, Total=79242 [2022-04-06 19:56:01,436 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 100 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 17022 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 17207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 17022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:01,436 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 319 Invalid, 17207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 17022 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 19:56:01,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 19:56:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2022-04-06 19:56:01,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.0103626943005182) internal successors, (195), 193 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-04-06 19:56:01,472 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 195 [2022-04-06 19:56:01,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:01,472 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-04-06 19:56:01,472 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 94 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:01,472 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-04-06 19:56:01,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 19:56:01,473 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:01,473 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:01,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:01,689 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:01,689 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:01,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:01,689 INFO L85 PathProgramCache]: Analyzing trace with hash 563564649, now seen corresponding path program 179 times [2022-04-06 19:56:01,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:01,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [527531852] [2022-04-06 19:56:01,691 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:01,691 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:01,691 INFO L85 PathProgramCache]: Analyzing trace with hash 563564649, now seen corresponding path program 180 times [2022-04-06 19:56:01,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:01,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115106665] [2022-04-06 19:56:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:01,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:01,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:04,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:04,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 93 proven. 8556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:04,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115106665] [2022-04-06 19:56:04,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115106665] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:04,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851230381] [2022-04-06 19:56:04,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:56:04,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:04,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:04,978 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 19:56:04,985 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 19:56:05,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:56:05,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:05,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:56:05,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 19:56:05,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 276 proven. 1 refuted. 0 times theorem prover too weak. 8372 trivial. 0 not checked. [2022-04-06 19:56:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851230381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:05,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:05,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 4, 4] total 100 [2022-04-06 19:56:05,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [527531852] [2022-04-06 19:56:05,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [527531852] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:05,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:05,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-04-06 19:56:05,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243233124] [2022-04-06 19:56:05,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:05,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-04-06 19:56:05,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-04-06 19:56:05,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=9241, Unknown=0, NotChecked=0, Total=9900 [2022-04-06 19:56:05,630 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:12,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:12,630 INFO L93 Difference]: Finished difference Result 208 states and 211 transitions. [2022-04-06 19:56:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-04-06 19:56:12,630 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-04-06 19:56:12,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:12,631 INFO L225 Difference]: With dead ends: 208 [2022-04-06 19:56:12,631 INFO L226 Difference]: Without dead ends: 200 [2022-04-06 19:56:12,633 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 584 GetRequests, 392 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4282 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1581, Invalid=35475, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 19:56:12,633 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 17455 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 17642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 17455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:12,633 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 374 Invalid, 17642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 17455 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 19:56:12,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-04-06 19:56:12,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-04-06 19:56:12,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0102564102564102) internal successors, (197), 195 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-04-06 19:56:12,645 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2022-04-06 19:56:12,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:12,645 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-04-06 19:56:12,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 95 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-04-06 19:56:12,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 19:56:12,645 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:12,646 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:12,661 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 19:56:12,861 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:12,862 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:12,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:12,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1933281850, now seen corresponding path program 181 times [2022-04-06 19:56:12,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:12,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [402333651] [2022-04-06 19:56:12,863 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:12,863 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:12,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1933281850, now seen corresponding path program 182 times [2022-04-06 19:56:12,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:12,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644282319] [2022-04-06 19:56:12,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:12,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:12,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:16,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:16,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:16,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:16,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644282319] [2022-04-06 19:56:16,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644282319] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:16,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003637763] [2022-04-06 19:56:16,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:56:16,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:16,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:16,193 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 19:56:16,194 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 19:56:16,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:56:16,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:16,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 190 conjunts are in the unsatisfiable core [2022-04-06 19:56:16,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:16,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:16,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:30,876 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 94 proven. 8742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:30,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003637763] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:30,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:30,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 96, 97] total 193 [2022-04-06 19:56:30,876 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:30,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [402333651] [2022-04-06 19:56:30,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [402333651] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:30,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:30,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-04-06 19:56:30,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643438051] [2022-04-06 19:56:30,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:30,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-04-06 19:56:30,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:30,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-04-06 19:56:30,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9503, Invalid=27553, Unknown=0, NotChecked=0, Total=37056 [2022-04-06 19:56:30,882 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:36,481 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2022-04-06 19:56:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-04-06 19:56:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-04-06 19:56:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:36,482 INFO L225 Difference]: With dead ends: 210 [2022-04-06 19:56:36,482 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 19:56:36,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 303 SyntacticMatches, 2 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4658 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=18995, Invalid=63087, Unknown=0, NotChecked=0, Total=82082 [2022-04-06 19:56:36,485 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 17790 mSolverCounterSat, 189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 17979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 189 IncrementalHoareTripleChecker+Valid, 17790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:36,485 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 344 Invalid, 17979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [189 Valid, 17790 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 19:56:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 19:56:36,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2022-04-06 19:56:36,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:36,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-04-06 19:56:36,496 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 199 [2022-04-06 19:56:36,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:36,496 INFO L478 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-04-06 19:56:36,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 96 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:36,497 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-04-06 19:56:36,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-04-06 19:56:36,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:36,497 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:36,514 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:36,713 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,SelfDestructingSolverStorable95 [2022-04-06 19:56:36,714 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:36,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:36,714 INFO L85 PathProgramCache]: Analyzing trace with hash -516048925, now seen corresponding path program 183 times [2022-04-06 19:56:36,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:36,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1843675294] [2022-04-06 19:56:36,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:36,715 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:36,715 INFO L85 PathProgramCache]: Analyzing trace with hash -516048925, now seen corresponding path program 184 times [2022-04-06 19:56:36,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:36,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210857528] [2022-04-06 19:56:36,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:36,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:36,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 95 proven. 8930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:39,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210857528] [2022-04-06 19:56:39,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210857528] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:39,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063967169] [2022-04-06 19:56:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:56:39,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:39,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:39,470 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 19:56:39,471 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 19:56:39,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:56:39,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:39,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 195 conjunts are in the unsatisfiable core [2022-04-06 19:56:39,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:40,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:40,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:40,524 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 4559 refuted. 0 times theorem prover too weak. 4466 trivial. 0 not checked. [2022-04-06 19:56:40,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063967169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:40,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 100, 6] total 104 [2022-04-06 19:56:40,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:40,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1843675294] [2022-04-06 19:56:40,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1843675294] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:40,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:40,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-04-06 19:56:40,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715037714] [2022-04-06 19:56:40,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:40,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-04-06 19:56:40,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:40,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-04-06 19:56:40,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=10316, Unknown=0, NotChecked=0, Total=10712 [2022-04-06 19:56:40,526 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:47,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:47,504 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2022-04-06 19:56:47,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-04-06 19:56:47,505 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-04-06 19:56:47,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:47,505 INFO L225 Difference]: With dead ends: 212 [2022-04-06 19:56:47,505 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 19:56:47,507 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 596 GetRequests, 396 SyntacticMatches, 3 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4482 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1058, Invalid=38344, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 19:56:47,507 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 18051 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 18242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 18051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:47,507 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 249 Invalid, 18242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 18051 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 19:56:47,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 19:56:47,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-04-06 19:56:47,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-04-06 19:56:47,518 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 201 [2022-04-06 19:56:47,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:47,518 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-04-06 19:56:47,518 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 97 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:47,518 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-04-06 19:56:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 19:56:47,519 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:47,519 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:47,535 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2022-04-06 19:56:47,732 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,SelfDestructingSolverStorable96 [2022-04-06 19:56:47,732 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:47,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:47,732 INFO L85 PathProgramCache]: Analyzing trace with hash -59840832, now seen corresponding path program 185 times [2022-04-06 19:56:47,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:47,732 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319995391] [2022-04-06 19:56:47,733 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:47,734 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:47,734 INFO L85 PathProgramCache]: Analyzing trace with hash -59840832, now seen corresponding path program 186 times [2022-04-06 19:56:47,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:47,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92527494] [2022-04-06 19:56:47,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:47,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:47,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:49,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:49,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 96 proven. 9120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:49,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:49,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92527494] [2022-04-06 19:56:49,901 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92527494] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:49,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953145255] [2022-04-06 19:56:49,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:56:49,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:49,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:49,904 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 19:56:49,904 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 19:56:49,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:56:49,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:49,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:56:49,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:50,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 1 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 19:56:50,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:56:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 285 proven. 1 refuted. 0 times theorem prover too weak. 8930 trivial. 0 not checked. [2022-04-06 19:56:50,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953145255] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:56:50,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:56:50,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 4, 4] total 103 [2022-04-06 19:56:50,370 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:56:50,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319995391] [2022-04-06 19:56:50,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319995391] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:56:50,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:56:50,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-04-06 19:56:50,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457056687] [2022-04-06 19:56:50,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:56:50,371 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-04-06 19:56:50,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:50,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-04-06 19:56:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=680, Invalid=9826, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 19:56:50,378 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:56,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:56:56,506 INFO L93 Difference]: Finished difference Result 214 states and 217 transitions. [2022-04-06 19:56:56,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-04-06 19:56:56,506 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-04-06 19:56:56,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:56:56,507 INFO L225 Difference]: With dead ends: 214 [2022-04-06 19:56:56,507 INFO L226 Difference]: Without dead ends: 206 [2022-04-06 19:56:56,509 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 404 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4564 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1632, Invalid=37770, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 19:56:56,509 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 104 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 18280 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 18473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 18280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-04-06 19:56:56,509 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 124 Invalid, 18473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 18280 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-04-06 19:56:56,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-04-06 19:56:56,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2022-04-06 19:56:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0099502487562189) internal successors, (203), 201 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2022-04-06 19:56:56,520 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 203 [2022-04-06 19:56:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:56:56,520 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2022-04-06 19:56:56,520 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 98 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:56:56,520 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2022-04-06 19:56:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 19:56:56,521 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:56:56,521 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:56:56,524 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-04-06 19:56:56,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:56,725 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:56:56,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:56:56,725 INFO L85 PathProgramCache]: Analyzing trace with hash 269472349, now seen corresponding path program 187 times [2022-04-06 19:56:56,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:56:56,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1511108194] [2022-04-06 19:56:56,726 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:56:56,726 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:56:56,727 INFO L85 PathProgramCache]: Analyzing trace with hash 269472349, now seen corresponding path program 188 times [2022-04-06 19:56:56,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:56:56,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044706052] [2022-04-06 19:56:56,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:56:56,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:56:56,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:58,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:56:58,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:56:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 97 proven. 9312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:58,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:56:58,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044706052] [2022-04-06 19:56:58,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044706052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:56:58,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277189321] [2022-04-06 19:56:58,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:56:58,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:56:58,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:56:59,000 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 19:56:59,000 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 19:56:59,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:56:59,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:56:59,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 199 conjunts are in the unsatisfiable core [2022-04-06 19:56:59,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:56:59,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:56:59,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:57:00,001 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 4752 refuted. 0 times theorem prover too weak. 4657 trivial. 0 not checked. [2022-04-06 19:57:00,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277189321] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:57:00,002 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:57:00,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 102, 6] total 106 [2022-04-06 19:57:00,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:57:00,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1511108194] [2022-04-06 19:57:00,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1511108194] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:57:00,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:57:00,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-04-06 19:57:00,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049123412] [2022-04-06 19:57:00,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:57:00,002 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-04-06 19:57:00,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:00,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-04-06 19:57:00,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=10726, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 19:57:00,003 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:57:07,057 INFO L93 Difference]: Finished difference Result 216 states and 219 transitions. [2022-04-06 19:57:07,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-04-06 19:57:07,058 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-04-06 19:57:07,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:57:07,058 INFO L225 Difference]: With dead ends: 216 [2022-04-06 19:57:07,058 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 19:57:07,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 404 SyntacticMatches, 3 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4673 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1080, Invalid=39926, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 19:57:07,060 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 18861 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 19056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 18861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 19:57:07,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 289 Invalid, 19056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 18861 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 19:57:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 19:57:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-04-06 19:57:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:07,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-04-06 19:57:07,082 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 205 [2022-04-06 19:57:07,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:57:07,082 INFO L478 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-04-06 19:57:07,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 99 states have internal predecessors, (201), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:07,082 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-04-06 19:57:07,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-04-06 19:57:07,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:57:07,088 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:57:07,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-04-06 19:57:07,303 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:07,304 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:57:07,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:57:07,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1088140614, now seen corresponding path program 189 times [2022-04-06 19:57:07,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:07,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1943927988] [2022-04-06 19:57:07,305 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:07,305 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:57:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1088140614, now seen corresponding path program 190 times [2022-04-06 19:57:07,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:57:07,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286361150] [2022-04-06 19:57:07,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:57:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:57:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:10,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:57:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:10,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 98 proven. 9506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:10,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:57:10,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286361150] [2022-04-06 19:57:10,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286361150] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:57:10,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865264039] [2022-04-06 19:57:10,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:57:10,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:10,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:57:10,036 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 19:57:10,040 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 19:57:10,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:57:10,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:57:10,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 199 conjunts are in the unsatisfiable core [2022-04-06 19:57:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:57:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:10,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:57:22,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:22,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865264039] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:57:22,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:57:22,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101, 101] total 202 [2022-04-06 19:57:22,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:57:22,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1943927988] [2022-04-06 19:57:22,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1943927988] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:57:22,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:57:22,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-04-06 19:57:22,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436381987] [2022-04-06 19:57:22,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:57:22,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-04-06 19:57:22,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:22,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-04-06 19:57:22,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10399, Invalid=30203, Unknown=0, NotChecked=0, Total=40602 [2022-04-06 19:57:22,232 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:57:29,380 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-04-06 19:57:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-04-06 19:57:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-04-06 19:57:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:57:29,381 INFO L225 Difference]: With dead ends: 218 [2022-04-06 19:57:29,381 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 19:57:29,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4957 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=20687, Invalid=69013, Unknown=0, NotChecked=0, Total=89700 [2022-04-06 19:57:29,383 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 19458 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 19655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 19458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:57:29,383 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 464 Invalid, 19655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 19458 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 19:57:29,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 19:57:29,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-04-06 19:57:29,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0097560975609756) internal successors, (207), 205 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:29,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-04-06 19:57:29,395 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 207 [2022-04-06 19:57:29,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:57:29,395 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-04-06 19:57:29,395 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 100 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:29,395 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-04-06 19:57:29,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 19:57:29,396 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:57:29,396 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:57:29,413 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 19:57:29,611 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,SelfDestructingSolverStorable99 [2022-04-06 19:57:29,612 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:57:29,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:57:29,612 INFO L85 PathProgramCache]: Analyzing trace with hash -84140073, now seen corresponding path program 191 times [2022-04-06 19:57:29,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:29,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393431810] [2022-04-06 19:57:29,613 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:29,613 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:57:29,613 INFO L85 PathProgramCache]: Analyzing trace with hash -84140073, now seen corresponding path program 192 times [2022-04-06 19:57:29,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:57:29,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985191324] [2022-04-06 19:57:29,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:57:29,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:57:29,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:32,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:57:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:32,298 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 99 proven. 9702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:32,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:57:32,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985191324] [2022-04-06 19:57:32,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985191324] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:57:32,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468573595] [2022-04-06 19:57:32,299 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:57:32,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:32,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:57:32,300 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 19:57:32,300 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 19:57:32,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:57:32,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:57:32,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 19:57:32,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:57:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 1 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 19:57:32,571 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:57:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 294 proven. 1 refuted. 0 times theorem prover too weak. 9506 trivial. 0 not checked. [2022-04-06 19:57:32,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468573595] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:57:32,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:57:32,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 4, 4] total 106 [2022-04-06 19:57:32,773 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:57:32,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393431810] [2022-04-06 19:57:32,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393431810] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:57:32,773 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:57:32,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-04-06 19:57:32,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399064180] [2022-04-06 19:57:32,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:57:32,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-04-06 19:57:32,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:32,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-04-06 19:57:32,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=10429, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 19:57:32,775 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:39,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:57:39,193 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2022-04-06 19:57:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-04-06 19:57:39,193 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-04-06 19:57:39,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:57:39,194 INFO L225 Difference]: With dead ends: 220 [2022-04-06 19:57:39,194 INFO L226 Difference]: Without dead ends: 212 [2022-04-06 19:57:39,196 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 620 GetRequests, 416 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4855 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1683, Invalid=40137, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 19:57:39,196 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 19411 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 19610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 19411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:57:39,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 99 Invalid, 19610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 19411 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 19:57:39,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-04-06 19:57:39,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2022-04-06 19:57:39,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0096618357487923) internal successors, (209), 207 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:39,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-04-06 19:57:39,207 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 209 [2022-04-06 19:57:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:57:39,208 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-04-06 19:57:39,208 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 101 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:57:39,208 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-04-06 19:57:39,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 19:57:39,208 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:57:39,208 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:57:39,226 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2022-04-06 19:57:39,424 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:39,424 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:57:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:57:39,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1607261772, now seen corresponding path program 193 times [2022-04-06 19:57:39,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:39,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1271661006] [2022-04-06 19:57:39,426 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:57:39,426 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:57:39,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1607261772, now seen corresponding path program 194 times [2022-04-06 19:57:39,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:57:39,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006669916] [2022-04-06 19:57:39,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:57:39,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:57:39,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:41,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:57:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:57:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:41,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:57:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006669916] [2022-04-06 19:57:41,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006669916] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:57:41,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709845169] [2022-04-06 19:57:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:57:41,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:57:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:57:41,846 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 19:57:41,847 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 19:57:41,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:57:41,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:57:41,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 202 conjunts are in the unsatisfiable core [2022-04-06 19:57:41,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:57:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:42,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:57:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 100 proven. 9900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:57:59,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709845169] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:57:59,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:57:59,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 102, 103] total 205 [2022-04-06 19:57:59,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:57:59,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1271661006] [2022-04-06 19:57:59,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1271661006] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:57:59,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:57:59,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-04-06 19:57:59,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534629250] [2022-04-06 19:57:59,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:57:59,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-04-06 19:57:59,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:57:59,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-04-06 19:57:59,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10709, Invalid=31111, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 19:57:59,261 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:07,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:58:07,644 INFO L93 Difference]: Finished difference Result 222 states and 225 transitions. [2022-04-06 19:58:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-04-06 19:58:07,644 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-04-06 19:58:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:58:07,646 INFO L225 Difference]: With dead ends: 222 [2022-04-06 19:58:07,646 INFO L226 Difference]: Without dead ends: 214 [2022-04-06 19:58:07,649 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 321 SyntacticMatches, 2 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=21407, Invalid=71313, Unknown=0, NotChecked=0, Total=92720 [2022-04-06 19:58:07,649 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 20190 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 20391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 20190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-04-06 19:58:07,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 419 Invalid, 20391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 20190 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-04-06 19:58:07,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-06 19:58:07,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 214. [2022-04-06 19:58:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:07,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-04-06 19:58:07,661 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 211 [2022-04-06 19:58:07,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:58:07,661 INFO L478 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-04-06 19:58:07,661 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 102 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:07,661 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-04-06 19:58:07,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-04-06 19:58:07,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:58:07,663 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:58:07,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 19:58:07,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:07,871 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:58:07,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:58:07,872 INFO L85 PathProgramCache]: Analyzing trace with hash -743366575, now seen corresponding path program 195 times [2022-04-06 19:58:07,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:07,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1497614970] [2022-04-06 19:58:07,873 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:58:07,873 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:58:07,873 INFO L85 PathProgramCache]: Analyzing trace with hash -743366575, now seen corresponding path program 196 times [2022-04-06 19:58:07,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:58:07,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276442143] [2022-04-06 19:58:07,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:58:07,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:58:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:11,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:58:11,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:11,226 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 101 proven. 10100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:58:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276442143] [2022-04-06 19:58:11,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276442143] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:58:11,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30569335] [2022-04-06 19:58:11,226 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:58:11,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:58:11,227 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 19:58:11,228 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 19:58:11,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:58:11,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:58:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 207 conjunts are in the unsatisfiable core [2022-04-06 19:58:11,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:58:11,833 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:11,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:58:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 5150 refuted. 0 times theorem prover too weak. 5051 trivial. 0 not checked. [2022-04-06 19:58:12,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30569335] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:58:12,177 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:58:12,177 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 106, 6] total 110 [2022-04-06 19:58:12,177 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:58:12,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1497614970] [2022-04-06 19:58:12,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1497614970] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:58:12,177 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:58:12,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-04-06 19:58:12,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103755818] [2022-04-06 19:58:12,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:58:12,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-04-06 19:58:12,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:12,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-04-06 19:58:12,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=11570, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 19:58:12,182 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:19,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:58:19,432 INFO L93 Difference]: Finished difference Result 224 states and 227 transitions. [2022-04-06 19:58:19,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-04-06 19:58:19,432 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-04-06 19:58:19,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:58:19,433 INFO L225 Difference]: With dead ends: 224 [2022-04-06 19:58:19,433 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 19:58:19,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 632 GetRequests, 420 SyntacticMatches, 3 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5067 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1124, Invalid=43186, Unknown=0, NotChecked=0, Total=44310 [2022-04-06 19:58:19,435 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 109 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 20649 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 20852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 20649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:58:19,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 469 Invalid, 20852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 20649 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 19:58:19,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 19:58:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-04-06 19:58:19,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:19,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-04-06 19:58:19,451 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 213 [2022-04-06 19:58:19,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:58:19,451 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-04-06 19:58:19,452 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 103 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:19,452 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-04-06 19:58:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 19:58:19,452 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:58:19,452 INFO L499 BasicCegarLoop]: trace histogram [102, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:58:19,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-04-06 19:58:19,666 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 19:58:19,666 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:58:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:58:19,667 INFO L85 PathProgramCache]: Analyzing trace with hash 531229614, now seen corresponding path program 197 times [2022-04-06 19:58:19,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:19,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [295802047] [2022-04-06 19:58:19,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:58:19,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:58:19,668 INFO L85 PathProgramCache]: Analyzing trace with hash 531229614, now seen corresponding path program 198 times [2022-04-06 19:58:19,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:58:19,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705676837] [2022-04-06 19:58:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:58:19,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:58:19,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:58:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:22,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 102 proven. 10302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:22,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:58:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705676837] [2022-04-06 19:58:22,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705676837] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:58:22,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77831907] [2022-04-06 19:58:22,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:58:22,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:22,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:58:22,729 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 19:58:22,730 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 19:58:22,798 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:58:22,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:58:22,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 19:58:22,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:58:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 1 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 19:58:23,246 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:58:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 303 proven. 1 refuted. 0 times theorem prover too weak. 10100 trivial. 0 not checked. [2022-04-06 19:58:23,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77831907] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:58:23,934 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:58:23,934 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 4, 8] total 113 [2022-04-06 19:58:23,935 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:58:23,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [295802047] [2022-04-06 19:58:23,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [295802047] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:58:23,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:58:23,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-04-06 19:58:23,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462977174] [2022-04-06 19:58:23,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:58:23,935 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-04-06 19:58:23,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:23,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-04-06 19:58:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=11865, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 19:58:23,936 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:31,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:58:31,165 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2022-04-06 19:58:31,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-04-06 19:58:31,166 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-04-06 19:58:31,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:58:31,166 INFO L225 Difference]: With dead ends: 226 [2022-04-06 19:58:31,166 INFO L226 Difference]: Without dead ends: 218 [2022-04-06 19:58:31,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 424 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5161 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1858, Invalid=44152, Unknown=0, NotChecked=0, Total=46010 [2022-04-06 19:58:31,168 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 20830 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 21035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 20830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:58:31,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 284 Invalid, 21035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 20830 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 19:58:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-04-06 19:58:31,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-04-06 19:58:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0093896713615023) internal successors, (215), 213 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2022-04-06 19:58:31,180 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 215 [2022-04-06 19:58:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:58:31,180 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2022-04-06 19:58:31,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 104 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:31,180 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2022-04-06 19:58:31,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 19:58:31,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:58:31,181 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:58:31,184 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 19:58:31,384 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,SelfDestructingSolverStorable103 [2022-04-06 19:58:31,385 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:58:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:58:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1352487883, now seen corresponding path program 199 times [2022-04-06 19:58:31,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:31,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [617002989] [2022-04-06 19:58:31,386 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:58:31,386 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:58:31,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1352487883, now seen corresponding path program 200 times [2022-04-06 19:58:31,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:58:31,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544433000] [2022-04-06 19:58:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:58:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:58:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:34,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:58:34,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:34,173 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 103 proven. 10506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:34,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:58:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544433000] [2022-04-06 19:58:34,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544433000] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:58:34,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95698107] [2022-04-06 19:58:34,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:58:34,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:34,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:58:34,174 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 19:58:34,174 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 19:58:34,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:58:34,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:58:34,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 211 conjunts are in the unsatisfiable core [2022-04-06 19:58:34,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:58:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:34,974 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:58:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 5355 refuted. 0 times theorem prover too weak. 5254 trivial. 0 not checked. [2022-04-06 19:58:35,313 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95698107] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:58:35,313 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:58:35,313 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 108, 6] total 112 [2022-04-06 19:58:35,314 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:58:35,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [617002989] [2022-04-06 19:58:35,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [617002989] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:58:35,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:58:35,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-04-06 19:58:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834782429] [2022-04-06 19:58:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:58:35,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-04-06 19:58:35,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:35,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-04-06 19:58:35,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=12004, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 19:58:35,315 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:41,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:58:41,743 INFO L93 Difference]: Finished difference Result 228 states and 231 transitions. [2022-04-06 19:58:41,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-04-06 19:58:41,743 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-04-06 19:58:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:58:41,743 INFO L225 Difference]: With dead ends: 228 [2022-04-06 19:58:41,744 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 19:58:41,745 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 428 SyntacticMatches, 3 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5270 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1146, Invalid=44864, Unknown=0, NotChecked=0, Total=46010 [2022-04-06 19:58:41,745 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20937 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 21144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 20937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:58:41,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 21144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 20937 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 19:58:41,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 19:58:41,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-04-06 19:58:41,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-04-06 19:58:41,757 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 217 [2022-04-06 19:58:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:58:41,757 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-04-06 19:58:41,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 105 states have internal predecessors, (213), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:58:41,757 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-04-06 19:58:41,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-04-06 19:58:41,758 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:58:41,758 INFO L499 BasicCegarLoop]: trace histogram [104, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:58:41,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2022-04-06 19:58:41,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:41,974 INFO L403 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:58:41,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:58:41,975 INFO L85 PathProgramCache]: Analyzing trace with hash 307701928, now seen corresponding path program 201 times [2022-04-06 19:58:41,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:58:41,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [495293748] [2022-04-06 19:58:41,976 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:58:41,976 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:58:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash 307701928, now seen corresponding path program 202 times [2022-04-06 19:58:41,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:58:41,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621116347] [2022-04-06 19:58:41,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:58:41,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:58:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:44,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:58:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:58:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:44,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:58:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621116347] [2022-04-06 19:58:44,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621116347] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:58:44,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858354431] [2022-04-06 19:58:44,542 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:58:44,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:58:44,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:58:44,542 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 19:58:44,543 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 19:58:44,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:58:44,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:58:44,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 210 conjunts are in the unsatisfiable core [2022-04-06 19:58:44,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:58:45,037 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:58:45,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:01,905 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 104 proven. 10712 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:01,905 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858354431] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:01,906 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 106, 107] total 213 [2022-04-06 19:59:01,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:01,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [495293748] [2022-04-06 19:59:01,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [495293748] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:01,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:01,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 19:59:01,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10692797] [2022-04-06 19:59:01,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:01,906 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 19:59:01,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:01,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 19:59:01,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11553, Invalid=33603, Unknown=0, NotChecked=0, Total=45156 [2022-04-06 19:59:01,908 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:09,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:09,260 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2022-04-06 19:59:09,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 19:59:09,261 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-04-06 19:59:09,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:09,261 INFO L225 Difference]: With dead ends: 230 [2022-04-06 19:59:09,261 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 19:59:09,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 650 GetRequests, 333 SyntacticMatches, 2 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5673 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=23095, Invalid=77077, Unknown=0, NotChecked=0, Total=100172 [2022-04-06 19:59:09,265 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 112 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21342 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 21342 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:09,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 29 Invalid, 21551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 21342 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-04-06 19:59:09,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 19:59:09,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-04-06 19:59:09,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 217 states have (on average 1.0092165898617511) internal successors, (219), 217 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2022-04-06 19:59:09,279 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 219 [2022-04-06 19:59:09,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:09,279 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2022-04-06 19:59:09,279 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 106 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:09,279 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2022-04-06 19:59:09,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 19:59:09,281 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:09,281 INFO L499 BasicCegarLoop]: trace histogram [105, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:09,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-04-06 19:59:09,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:09,498 INFO L403 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:09,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1290746437, now seen corresponding path program 203 times [2022-04-06 19:59:09,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:09,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [808870546] [2022-04-06 19:59:09,499 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:09,499 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:09,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1290746437, now seen corresponding path program 204 times [2022-04-06 19:59:09,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:09,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617642285] [2022-04-06 19:59:09,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:09,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:09,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 105 proven. 10920 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:12,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:12,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617642285] [2022-04-06 19:59:12,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617642285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:12,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918078572] [2022-04-06 19:59:12,480 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 19:59:12,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:12,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:12,481 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 19:59:12,481 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 19:59:12,537 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 19:59:12,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:12,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 19:59:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:12,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 1 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 19:59:12,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:13,135 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 312 proven. 1 refuted. 0 times theorem prover too weak. 10712 trivial. 0 not checked. [2022-04-06 19:59:13,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918078572] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:13,136 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:13,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 4, 5] total 113 [2022-04-06 19:59:13,136 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:13,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [808870546] [2022-04-06 19:59:13,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [808870546] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:13,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:13,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-04-06 19:59:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023291577] [2022-04-06 19:59:13,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:13,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-04-06 19:59:13,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:13,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-04-06 19:59:13,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=752, Invalid=11904, Unknown=0, NotChecked=0, Total=12656 [2022-04-06 19:59:13,137 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 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 19:59:21,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:21,041 INFO L93 Difference]: Finished difference Result 232 states and 235 transitions. [2022-04-06 19:59:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-04-06 19:59:21,042 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 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 221 [2022-04-06 19:59:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:21,043 INFO L225 Difference]: With dead ends: 232 [2022-04-06 19:59:21,043 INFO L226 Difference]: Without dead ends: 224 [2022-04-06 19:59:21,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 439 SyntacticMatches, 1 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5464 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1798, Invalid=45508, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 19:59:21,045 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 22219 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 22430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 22219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:21,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 414 Invalid, 22430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 22219 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 19:59:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-04-06 19:59:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-04-06 19:59:21,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.0091324200913243) internal successors, (221), 219 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:21,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2022-04-06 19:59:21,057 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 221 [2022-04-06 19:59:21,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:21,057 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2022-04-06 19:59:21,057 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 107 states have internal predecessors, (217), 2 states have call successors, (3), 3 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 19:59:21,057 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2022-04-06 19:59:21,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 19:59:21,058 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:21,058 INFO L499 BasicCegarLoop]: trace histogram [106, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:21,062 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 19:59:21,261 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,SelfDestructingSolverStorable106 [2022-04-06 19:59:21,261 INFO L403 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1103714466, now seen corresponding path program 205 times [2022-04-06 19:59:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:21,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1366249307] [2022-04-06 19:59:21,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:21,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:21,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1103714466, now seen corresponding path program 206 times [2022-04-06 19:59:21,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:21,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565611078] [2022-04-06 19:59:21,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:21,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:23,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:23,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 106 proven. 11130 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:24,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565611078] [2022-04-06 19:59:24,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565611078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813683111] [2022-04-06 19:59:24,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 19:59:24,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:24,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:24,002 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 19:59:24,003 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 19:59:24,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 19:59:24,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:24,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 215 conjunts are in the unsatisfiable core [2022-04-06 19:59:24,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:24,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:37,896 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:37,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813683111] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:37,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:37,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109, 109] total 218 [2022-04-06 19:59:37,896 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:37,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1366249307] [2022-04-06 19:59:37,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1366249307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:37,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:37,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-04-06 19:59:37,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511876570] [2022-04-06 19:59:37,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:37,897 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-04-06 19:59:37,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:37,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-04-06 19:59:37,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12095, Invalid=35211, Unknown=0, NotChecked=0, Total=47306 [2022-04-06 19:59:37,912 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 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 19:59:45,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:45,585 INFO L93 Difference]: Finished difference Result 234 states and 237 transitions. [2022-04-06 19:59:45,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-04-06 19:59:45,585 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 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 223 [2022-04-06 19:59:45,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:45,585 INFO L225 Difference]: With dead ends: 234 [2022-04-06 19:59:45,585 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 19:59:45,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 338 SyntacticMatches, 2 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5785 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=24071, Invalid=80581, Unknown=0, NotChecked=0, Total=104652 [2022-04-06 19:59:45,588 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 22746 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 22959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 22746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:45,589 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 504 Invalid, 22959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 22746 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 19:59:45,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 19:59:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2022-04-06 19:59:45,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2022-04-06 19:59:45,601 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 223 [2022-04-06 19:59:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:45,601 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2022-04-06 19:59:45,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 108 states have internal predecessors, (219), 2 states have call successors, (3), 3 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 19:59:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2022-04-06 19:59:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2022-04-06 19:59:45,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:45,602 INFO L499 BasicCegarLoop]: trace histogram [107, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:45,618 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 19:59:45,818 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-04-06 19:59:45,818 INFO L403 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:45,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1754616767, now seen corresponding path program 207 times [2022-04-06 19:59:45,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:45,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2058308503] [2022-04-06 19:59:45,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:45,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:45,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1754616767, now seen corresponding path program 208 times [2022-04-06 19:59:45,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:45,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457685009] [2022-04-06 19:59:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:45,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:45,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:48,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 19:59:48,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 19:59:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 107 proven. 11342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:48,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 19:59:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457685009] [2022-04-06 19:59:48,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457685009] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 19:59:48,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976841773] [2022-04-06 19:59:48,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 19:59:48,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:48,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 19:59:48,783 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 19:59:48,784 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 19:59:48,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 19:59:48,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 19:59:48,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 219 conjunts are in the unsatisfiable core [2022-04-06 19:59:48,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 19:59:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 19:59:49,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 19:59:49,815 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 5777 refuted. 0 times theorem prover too weak. 5672 trivial. 0 not checked. [2022-04-06 19:59:49,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976841773] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 19:59:49,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 19:59:49,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 112, 6] total 116 [2022-04-06 19:59:49,815 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 19:59:49,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2058308503] [2022-04-06 19:59:49,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2058308503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 19:59:49,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 19:59:49,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-04-06 19:59:49,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067217133] [2022-04-06 19:59:49,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 19:59:49,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-04-06 19:59:49,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:49,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-04-06 19:59:49,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=12896, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 19:59:49,817 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 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 19:59:59,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 19:59:59,678 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2022-04-06 19:59:59,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-04-06 19:59:59,678 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 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 225 [2022-04-06 19:59:59,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 19:59:59,678 INFO L225 Difference]: With dead ends: 236 [2022-04-06 19:59:59,678 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 19:59:59,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 668 GetRequests, 444 SyntacticMatches, 3 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5688 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1190, Invalid=48316, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 19:59:59,680 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 115 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 23205 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 23420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 23205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-04-06 19:59:59,681 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 534 Invalid, 23420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 23205 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-04-06 19:59:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 19:59:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2022-04-06 19:59:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0089686098654709) internal successors, (225), 223 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 19:59:59,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2022-04-06 19:59:59,693 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 225 [2022-04-06 19:59:59,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 19:59:59,693 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2022-04-06 19:59:59,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 109 states have internal predecessors, (221), 2 states have call successors, (3), 3 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 19:59:59,693 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2022-04-06 19:59:59,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 19:59:59,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 19:59:59,694 INFO L499 BasicCegarLoop]: trace histogram [108, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 19:59:59,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2022-04-06 19:59:59,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 19:59:59,900 INFO L403 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 19:59:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 19:59:59,900 INFO L85 PathProgramCache]: Analyzing trace with hash 206502812, now seen corresponding path program 209 times [2022-04-06 19:59:59,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 19:59:59,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [99458589] [2022-04-06 19:59:59,901 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 19:59:59,901 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 19:59:59,901 INFO L85 PathProgramCache]: Analyzing trace with hash 206502812, now seen corresponding path program 210 times [2022-04-06 19:59:59,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 19:59:59,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567666311] [2022-04-06 19:59:59,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 19:59:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 19:59:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:03,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:03,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 108 proven. 11556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:03,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567666311] [2022-04-06 20:00:03,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567666311] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:03,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896637646] [2022-04-06 20:00:03,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:00:03,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:03,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:03,398 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 20:00:03,399 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 20:00:03,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:00:03,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:03,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:00:03,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:03,872 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 1 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:00:03,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 321 proven. 1 refuted. 0 times theorem prover too weak. 11342 trivial. 0 not checked. [2022-04-06 20:00:04,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896637646] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:04,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:04,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 4, 4] total 115 [2022-04-06 20:00:04,214 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:04,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [99458589] [2022-04-06 20:00:04,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [99458589] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:04,215 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:04,215 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-04-06 20:00:04,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858497734] [2022-04-06 20:00:04,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:04,215 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-04-06 20:00:04,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-04-06 20:00:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=764, Invalid=12346, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:00:04,216 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 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 20:00:12,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:12,734 INFO L93 Difference]: Finished difference Result 238 states and 241 transitions. [2022-04-06 20:00:12,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-04-06 20:00:12,734 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 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 227 [2022-04-06 20:00:12,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:12,735 INFO L225 Difference]: With dead ends: 238 [2022-04-06 20:00:12,735 INFO L226 Difference]: Without dead ends: 230 [2022-04-06 20:00:12,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 452 SyntacticMatches, 1 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5782 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1836, Invalid=47670, Unknown=0, NotChecked=0, Total=49506 [2022-04-06 20:00:12,737 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 116 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 23230 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 23447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 23230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:12,737 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 199 Invalid, 23447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 23230 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-04-06 20:00:12,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-04-06 20:00:12,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-04-06 20:00:12,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.008888888888889) internal successors, (227), 225 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:12,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2022-04-06 20:00:12,751 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 227 [2022-04-06 20:00:12,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:12,751 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2022-04-06 20:00:12,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 110 states have internal predecessors, (223), 2 states have call successors, (3), 3 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 20:00:12,751 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2022-04-06 20:00:12,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 20:00:12,752 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:12,752 INFO L499 BasicCegarLoop]: trace histogram [109, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:12,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:12,960 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:12,960 INFO L403 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:12,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:12,961 INFO L85 PathProgramCache]: Analyzing trace with hash -1472323527, now seen corresponding path program 211 times [2022-04-06 20:00:12,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:12,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083009533] [2022-04-06 20:00:12,962 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:00:12,962 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:00:12,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1472323527, now seen corresponding path program 212 times [2022-04-06 20:00:12,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:12,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342295651] [2022-04-06 20:00:12,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:12,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:16,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 109 proven. 11772 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:16,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:16,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342295651] [2022-04-06 20:00:16,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342295651] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:16,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403839216] [2022-04-06 20:00:16,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:00:16,788 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:16,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:16,789 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 20:00:16,789 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 20:00:16,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:00:16,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:16,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 223 conjunts are in the unsatisfiable core [2022-04-06 20:00:16,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:17,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 5994 refuted. 0 times theorem prover too weak. 5887 trivial. 0 not checked. [2022-04-06 20:00:18,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403839216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:18,499 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 114, 6] total 118 [2022-04-06 20:00:18,500 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083009533] [2022-04-06 20:00:18,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083009533] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:18,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:18,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-04-06 20:00:18,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918792186] [2022-04-06 20:00:18,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:18,500 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-04-06 20:00:18,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:18,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-04-06 20:00:18,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=13354, Unknown=0, NotChecked=0, Total=13806 [2022-04-06 20:00:18,501 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 20:00:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:00:30,005 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2022-04-06 20:00:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-04-06 20:00:30,005 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-04-06 20:00:30,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:00:30,005 INFO L225 Difference]: With dead ends: 240 [2022-04-06 20:00:30,005 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:00:30,008 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 680 GetRequests, 452 SyntacticMatches, 3 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5903 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1212, Invalid=50090, Unknown=0, NotChecked=0, Total=51302 [2022-04-06 20:00:30,008 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 23763 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 23982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 23763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:00:30,008 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 284 Invalid, 23982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 23763 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2022-04-06 20:00:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:00:30,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-04-06 20:00:30,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:00:30,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-04-06 20:00:30,021 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 229 [2022-04-06 20:00:30,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:00:30,021 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-04-06 20:00:30,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 111 states have internal predecessors, (225), 2 states have call successors, (3), 3 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 20:00:30,021 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-04-06 20:00:30,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-04-06 20:00:30,022 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:00:30,022 INFO L499 BasicCegarLoop]: trace histogram [110, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:00:30,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2022-04-06 20:00:30,239 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,SelfDestructingSolverStorable110 [2022-04-06 20:00:30,239 INFO L403 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:00:30,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:00:30,239 INFO L85 PathProgramCache]: Analyzing trace with hash 83267990, now seen corresponding path program 213 times [2022-04-06 20:00:30,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:30,239 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1280193997] [2022-04-06 20:00:30,240 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:00:30,240 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:00:30,240 INFO L85 PathProgramCache]: Analyzing trace with hash 83267990, now seen corresponding path program 214 times [2022-04-06 20:00:30,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:00:30,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439348452] [2022-04-06 20:00:30,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:00:30,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:00:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:33,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:00:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:00:33,904 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 110 proven. 11990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:33,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:00:33,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439348452] [2022-04-06 20:00:33,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439348452] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:00:33,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678694779] [2022-04-06 20:00:33,904 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:00:33,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:00:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:00:33,905 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 20:00:33,905 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 20:00:34,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:00:34,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:00:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 223 conjunts are in the unsatisfiable core [2022-04-06 20:00:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:00:34,720 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:34,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:00:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:00:50,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678694779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:00:50,274 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:00:50,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113, 113] total 226 [2022-04-06 20:00:50,274 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:00:50,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1280193997] [2022-04-06 20:00:50,274 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1280193997] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:00:50,274 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:00:50,274 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-04-06 20:00:50,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578049334] [2022-04-06 20:00:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:00:50,274 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-04-06 20:00:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:00:50,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-04-06 20:00:50,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12991, Invalid=37859, Unknown=0, NotChecked=0, Total=50850 [2022-04-06 20:00:50,277 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 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 20:01:00,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:00,009 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-04-06 20:01:00,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-04-06 20:01:00,009 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 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 231 [2022-04-06 20:01:00,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:00,009 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:01:00,010 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 20:01:00,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 686 GetRequests, 350 SyntacticMatches, 2 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6223 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=25859, Invalid=86701, Unknown=0, NotChecked=0, Total=112560 [2022-04-06 20:01:00,014 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 23904 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 24125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 23904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:00,015 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 39 Invalid, 24125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 23904 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-06 20:01:00,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 20:01:00,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2022-04-06 20:01:00,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 229 states have (on average 1.0087336244541485) internal successors, (231), 229 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2022-04-06 20:01:00,027 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 231 [2022-04-06 20:01:00,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:00,028 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2022-04-06 20:01:00,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 112 states have internal predecessors, (227), 2 states have call successors, (3), 3 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 20:01:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2022-04-06 20:01:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:01:00,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:00,028 INFO L499 BasicCegarLoop]: trace histogram [111, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:00,055 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 20:01:00,245 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,SelfDestructingSolverStorable111 [2022-04-06 20:01:00,245 INFO L403 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:00,245 INFO L85 PathProgramCache]: Analyzing trace with hash 358096819, now seen corresponding path program 215 times [2022-04-06 20:01:00,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:00,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1474330112] [2022-04-06 20:01:00,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:01:00,247 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:01:00,247 INFO L85 PathProgramCache]: Analyzing trace with hash 358096819, now seen corresponding path program 216 times [2022-04-06 20:01:00,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:00,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325909379] [2022-04-06 20:01:00,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:00,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:00,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:04,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 111 proven. 12210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325909379] [2022-04-06 20:01:04,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325909379] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:04,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89993222] [2022-04-06 20:01:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:01:04,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:04,126 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 20:01:04,127 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 20:01:04,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:01:04,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 20:01:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 1 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:01:04,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 330 proven. 1 refuted. 0 times theorem prover too weak. 11990 trivial. 0 not checked. [2022-04-06 20:01:04,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89993222] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:04,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:04,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 4, 5] total 119 [2022-04-06 20:01:04,976 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:04,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1474330112] [2022-04-06 20:01:04,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1474330112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:04,976 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:04,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-04-06 20:01:04,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254339001] [2022-04-06 20:01:04,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:04,976 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-04-06 20:01:04,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:04,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-04-06 20:01:04,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=794, Invalid=13248, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:01:04,978 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 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 20:01:15,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:15,552 INFO L93 Difference]: Finished difference Result 244 states and 247 transitions. [2022-04-06 20:01:15,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-04-06 20:01:15,552 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 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 233 [2022-04-06 20:01:15,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:15,553 INFO L225 Difference]: With dead ends: 244 [2022-04-06 20:01:15,553 INFO L226 Difference]: Without dead ends: 236 [2022-04-06 20:01:15,555 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 692 GetRequests, 463 SyntacticMatches, 1 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6109 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=1900, Invalid=50770, Unknown=0, NotChecked=0, Total=52670 [2022-04-06 20:01:15,555 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 24607 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 24830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 24607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:15,555 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 259 Invalid, 24830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 24607 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-04-06 20:01:15,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-04-06 20:01:15,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 236. [2022-04-06 20:01:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.0086580086580086) internal successors, (233), 231 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:15,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2022-04-06 20:01:15,568 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 233 [2022-04-06 20:01:15,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:15,568 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2022-04-06 20:01:15,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 113 states have internal predecessors, (229), 2 states have call successors, (3), 3 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 20:01:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2022-04-06 20:01:15,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-04-06 20:01:15,569 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:15,569 INFO L499 BasicCegarLoop]: trace histogram [112, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:15,572 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 20:01:15,775 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,SelfDestructingSolverStorable112 [2022-04-06 20:01:15,775 INFO L403 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:15,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:15,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1819370864, now seen corresponding path program 217 times [2022-04-06 20:01:15,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:15,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2037376965] [2022-04-06 20:01:15,776 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:01:15,776 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:01:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1819370864, now seen corresponding path program 218 times [2022-04-06 20:01:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507752007] [2022-04-06 20:01:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:19,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:19,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:19,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507752007] [2022-04-06 20:01:19,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507752007] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:19,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339077101] [2022-04-06 20:01:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:01:19,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:19,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:19,913 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 20:01:19,913 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 20:01:20,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:01:20,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:20,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 226 conjunts are in the unsatisfiable core [2022-04-06 20:01:20,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:20,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:20,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:43,411 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 112 proven. 12432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:43,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339077101] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:43,411 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:43,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 114, 115] total 229 [2022-04-06 20:01:43,411 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:43,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2037376965] [2022-04-06 20:01:43,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2037376965] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:43,411 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:43,411 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-04-06 20:01:43,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036930336] [2022-04-06 20:01:43,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:43,412 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-04-06 20:01:43,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:43,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-04-06 20:01:43,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13337, Invalid=38875, Unknown=0, NotChecked=0, Total=52212 [2022-04-06 20:01:43,414 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 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 20:01:53,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:01:53,388 INFO L93 Difference]: Finished difference Result 246 states and 249 transitions. [2022-04-06 20:01:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-04-06 20:01:53,391 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 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 235 [2022-04-06 20:01:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:01:53,392 INFO L225 Difference]: With dead ends: 246 [2022-04-06 20:01:53,392 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 20:01:53,396 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 698 GetRequests, 357 SyntacticMatches, 2 SemanticMatches, 339 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6557 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=26663, Invalid=89277, Unknown=0, NotChecked=0, Total=115940 [2022-04-06 20:01:53,396 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 25176 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 25401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 25176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:01:53,397 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 364 Invalid, 25401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 25176 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-04-06 20:01:53,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 20:01:53,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-04-06 20:01:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 233 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:01:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2022-04-06 20:01:53,410 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 235 [2022-04-06 20:01:53,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:01:53,410 INFO L478 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2022-04-06 20:01:53,410 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 114 states have internal predecessors, (231), 2 states have call successors, (3), 3 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 20:01:53,410 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2022-04-06 20:01:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-04-06 20:01:53,411 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:01:53,411 INFO L499 BasicCegarLoop]: trace histogram [113, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:01:53,430 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 20:01:53,624 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,SelfDestructingSolverStorable113 [2022-04-06 20:01:53,625 INFO L403 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:01:53,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:01:53,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1578226221, now seen corresponding path program 219 times [2022-04-06 20:01:53,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:53,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821325029] [2022-04-06 20:01:53,626 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:01:53,626 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:01:53,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1578226221, now seen corresponding path program 220 times [2022-04-06 20:01:53,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:01:53,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622457433] [2022-04-06 20:01:53,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:01:53,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:01:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:57,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:01:57,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:01:57,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 113 proven. 12656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:57,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:01:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622457433] [2022-04-06 20:01:57,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622457433] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:01:57,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044798324] [2022-04-06 20:01:57,673 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:01:57,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:01:57,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:01:57,674 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:01:57,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-04-06 20:01:57,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:01:57,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:01:57,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 231 conjunts are in the unsatisfiable core [2022-04-06 20:01:57,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:01:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 12769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:01:58,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:01:59,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 6440 refuted. 0 times theorem prover too weak. 6329 trivial. 0 not checked. [2022-04-06 20:01:59,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044798324] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:01:59,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:01:59,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 118, 6] total 122 [2022-04-06 20:01:59,522 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:01:59,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821325029] [2022-04-06 20:01:59,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821325029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:01:59,522 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:01:59,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-04-06 20:01:59,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169607022] [2022-04-06 20:01:59,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:01:59,522 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-04-06 20:01:59,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:01:59,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-04-06 20:01:59,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=14294, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:01:59,523 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 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 20:02:11,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:11,111 INFO L93 Difference]: Finished difference Result 248 states and 251 transitions. [2022-04-06 20:02:11,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-04-06 20:02:11,111 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 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 237 [2022-04-06 20:02:11,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:11,112 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:02:11,112 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 20:02:11,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 704 GetRequests, 468 SyntacticMatches, 3 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6345 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1256, Invalid=53734, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 20:02:11,114 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 25695 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 424 SdHoareTripleChecker+Invalid, 25922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 25695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:11,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 424 Invalid, 25922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 25695 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-04-06 20:02:11,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 20:02:11,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-04-06 20:02:11,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0085106382978724) internal successors, (237), 235 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:11,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2022-04-06 20:02:11,128 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 237 [2022-04-06 20:02:11,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:11,128 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2022-04-06 20:02:11,128 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 115 states have internal predecessors, (233), 2 states have call successors, (3), 3 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 20:02:11,128 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2022-04-06 20:02:11,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:02:11,129 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:11,129 INFO L499 BasicCegarLoop]: trace histogram [114, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:11,146 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:11,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:11,346 INFO L403 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1801087350, now seen corresponding path program 221 times [2022-04-06 20:02:11,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:11,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840618826] [2022-04-06 20:02:11,347 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:02:11,347 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:02:11,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1801087350, now seen corresponding path program 222 times [2022-04-06 20:02:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:11,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861610436] [2022-04-06 20:02:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 114 proven. 12882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861610436] [2022-04-06 20:02:14,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861610436] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289964977] [2022-04-06 20:02:14,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:02:14,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:14,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:14,793 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:14,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-04-06 20:02:14,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:02:14,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:14,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:02:14,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:15,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 1 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:02:15,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 339 proven. 1 refuted. 0 times theorem prover too weak. 12656 trivial. 0 not checked. [2022-04-06 20:02:15,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289964977] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:15,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:15,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 4, 4] total 121 [2022-04-06 20:02:15,624 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:15,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840618826] [2022-04-06 20:02:15,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840618826] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:15,624 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:15,624 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-04-06 20:02:15,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484335970] [2022-04-06 20:02:15,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:15,624 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-04-06 20:02:15,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:15,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-04-06 20:02:15,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=13714, Unknown=0, NotChecked=0, Total=14520 [2022-04-06 20:02:15,626 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 states have internal predecessors, (235), 2 states have call successors, (3), 3 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 20:02:24,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:24,404 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2022-04-06 20:02:24,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-04-06 20:02:24,404 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-04-06 20:02:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:24,405 INFO L225 Difference]: With dead ends: 250 [2022-04-06 20:02:24,405 INFO L226 Difference]: Without dead ends: 242 [2022-04-06 20:02:24,407 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 710 GetRequests, 476 SyntacticMatches, 1 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6445 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1938, Invalid=53052, Unknown=0, NotChecked=0, Total=54990 [2022-04-06 20:02:24,408 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 122 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 25792 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 26021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 25792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:24,408 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 129 Invalid, 26021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 25792 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-04-06 20:02:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-04-06 20:02:24,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2022-04-06 20:02:24,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.0084388185654007) internal successors, (239), 237 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:24,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2022-04-06 20:02:24,421 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 239 [2022-04-06 20:02:24,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:24,421 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2022-04-06 20:02:24,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 116 states have internal predecessors, (235), 2 states have call successors, (3), 3 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 20:02:24,421 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2022-04-06 20:02:24,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 20:02:24,422 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:24,422 INFO L499 BasicCegarLoop]: trace histogram [115, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:24,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:24,635 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:24,635 INFO L403 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:24,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:24,636 INFO L85 PathProgramCache]: Analyzing trace with hash 1968813991, now seen corresponding path program 223 times [2022-04-06 20:02:24,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:24,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [810258361] [2022-04-06 20:02:24,638 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:02:24,639 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:02:24,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1968813991, now seen corresponding path program 224 times [2022-04-06 20:02:24,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:24,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499928469] [2022-04-06 20:02:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:24,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:24,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:28,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 115 proven. 13110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:28,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:28,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499928469] [2022-04-06 20:02:28,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499928469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:28,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148855683] [2022-04-06 20:02:28,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:02:28,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:28,353 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:28,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-04-06 20:02:28,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:02:28,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 235 conjunts are in the unsatisfiable core [2022-04-06 20:02:28,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:29,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:02:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 6669 refuted. 0 times theorem prover too weak. 6556 trivial. 0 not checked. [2022-04-06 20:02:29,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148855683] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:02:29,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:02:29,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 120, 6] total 124 [2022-04-06 20:02:29,439 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:02:29,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [810258361] [2022-04-06 20:02:29,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [810258361] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:02:29,439 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:02:29,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-04-06 20:02:29,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220942868] [2022-04-06 20:02:29,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:02:29,439 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-04-06 20:02:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-04-06 20:02:29,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=476, Invalid=14776, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:02:29,440 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 states have internal predecessors, (237), 2 states have call successors, (3), 3 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 20:02:37,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:02:37,803 INFO L93 Difference]: Finished difference Result 252 states and 255 transitions. [2022-04-06 20:02:37,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-04-06 20:02:37,803 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 states have internal predecessors, (237), 2 states have call successors, (3), 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 241 [2022-04-06 20:02:37,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:02:37,804 INFO L225 Difference]: With dead ends: 252 [2022-04-06 20:02:37,804 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 20:02:37,805 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 476 SyntacticMatches, 3 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6572 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1278, Invalid=55604, Unknown=0, NotChecked=0, Total=56882 [2022-04-06 20:02:37,806 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 26379 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 26610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 26379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:02:37,806 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 239 Invalid, 26610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 26379 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-04-06 20:02:37,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 20:02:37,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 244. [2022-04-06 20:02:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:02:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2022-04-06 20:02:37,819 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 241 [2022-04-06 20:02:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:02:37,820 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2022-04-06 20:02:37,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 117 states have internal predecessors, (237), 2 states have call successors, (3), 3 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 20:02:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2022-04-06 20:02:37,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-04-06 20:02:37,821 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:02:37,821 INFO L499 BasicCegarLoop]: trace histogram [116, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:02:37,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2022-04-06 20:02:38,023 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2022-04-06 20:02:38,023 INFO L403 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:02:38,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:02:38,024 INFO L85 PathProgramCache]: Analyzing trace with hash -108395132, now seen corresponding path program 225 times [2022-04-06 20:02:38,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:02:38,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1196946985] [2022-04-06 20:02:38,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:02:38,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:02:38,025 INFO L85 PathProgramCache]: Analyzing trace with hash -108395132, now seen corresponding path program 226 times [2022-04-06 20:02:38,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:02:38,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843690578] [2022-04-06 20:02:38,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:02:38,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:02:38,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:42,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:02:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:02:42,079 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 116 proven. 13340 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:42,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:02:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843690578] [2022-04-06 20:02:42,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843690578] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:02:42,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657361075] [2022-04-06 20:02:42,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:02:42,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:02:42,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:02:42,080 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:02:42,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-04-06 20:02:42,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:02:42,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:02:42,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 235 conjunts are in the unsatisfiable core [2022-04-06 20:02:42,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:02:42,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:02:42,784 INFO L328 TraceCheckSpWp]: Computing backward predicates...