/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:40:14,430 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:40:14,442 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:40:14,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:40:14,544 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:40:14,545 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:40:14,546 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:40:14,547 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 20:40:14,557 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:40:14,558 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:40:14,559 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:40:14,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:40:14,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:40:14,559 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:40:14,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:40:14,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:40:14,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:40:14,560 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:40:14,560 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:40:14,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:40:14,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:40:14,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:40:14,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:40:14,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:40:14,561 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:40:14,561 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:40:14,562 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:40:14,562 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:40:14,562 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:40:14,562 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:40:14,562 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:40:14,797 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:40:14,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:40:14,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:40:14,821 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:40:14,821 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:40:14,822 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2022-04-06 20:40:14,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65d5503a/0e238cde15d145a28f1b1a34cdde313c/FLAGf677a5d84 [2022-04-06 20:40:15,273 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:40:15,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2022-04-06 20:40:15,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65d5503a/0e238cde15d145a28f1b1a34cdde313c/FLAGf677a5d84 [2022-04-06 20:40:15,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f65d5503a/0e238cde15d145a28f1b1a34cdde313c [2022-04-06 20:40:15,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:40:15,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:40:15,698 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:40:15,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:40:15,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:40:15,702 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,703 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fc4fbce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15, skipping insertion in model container [2022-04-06 20:40:15,703 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:40:15,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:40:15,860 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c[319,332] [2022-04-06 20:40:15,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:40:15,882 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:40:15,891 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c[319,332] [2022-04-06 20:40:15,895 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:40:15,903 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:40:15,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15 WrapperNode [2022-04-06 20:40:15,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:40:15,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:40:15,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:40:15,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:40:15,913 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,918 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,918 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,923 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,924 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,925 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:40:15,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:40:15,926 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:40:15,926 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:40:15,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (1/1) ... [2022-04-06 20:40:15,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:40:15,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:15,953 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 20:40:15,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 20:40:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:40:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:40:15,987 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:40:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:40:15,988 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:40:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:40:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:40:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:40:15,988 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:40:15,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:40:16,037 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:40:16,039 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:40:16,149 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:40:16,154 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:40:16,154 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:40:16,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:40:16 BoogieIcfgContainer [2022-04-06 20:40:16,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:40:16,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:40:16,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:40:16,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:40:16,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:40:15" (1/3) ... [2022-04-06 20:40:16,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107b4191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:40:16, skipping insertion in model container [2022-04-06 20:40:16,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:40:15" (2/3) ... [2022-04-06 20:40:16,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@107b4191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:40:16, skipping insertion in model container [2022-04-06 20:40:16,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:40:16" (3/3) ... [2022-04-06 20:40:16,167 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2022-04-06 20:40:16,171 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:40:16,171 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:40:16,218 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:40:16,228 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 20:40:16,228 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:40:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 20:40:16,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:40:16,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:16,256 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:16,257 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:16,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:16,261 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2022-04-06 20:40:16,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [227475071] [2022-04-06 20:40:16,279 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:40:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 2 times [2022-04-06 20:40:16,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:16,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148451529] [2022-04-06 20:40:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:16,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:16,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:16,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148451529] [2022-04-06 20:40:16,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148451529] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:16,465 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:16,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:40:16,467 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:16,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [227475071] [2022-04-06 20:40:16,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [227475071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:16,468 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:16,468 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:40:16,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860776997] [2022-04-06 20:40:16,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:16,472 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:40:16,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:40:16,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:40:16,493 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 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 20:40:16,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:16,549 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-04-06 20:40:16,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:40:16,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:40:16,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:16,556 INFO L225 Difference]: With dead ends: 33 [2022-04-06 20:40:16,557 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:40:16,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:40:16,562 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 20:40:16,563 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:16,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:40:16,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:40:16,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 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 20:40:16,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-06 20:40:16,596 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-06 20:40:16,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:16,597 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-06 20:40:16,597 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,597 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-06 20:40:16,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:40:16,598 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:16,598 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:16,599 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:40:16,599 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:16,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:16,600 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2022-04-06 20:40:16,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1483861976] [2022-04-06 20:40:16,602 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:40:16,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 2 times [2022-04-06 20:40:16,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:16,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287302620] [2022-04-06 20:40:16,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:16,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:16,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:16,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:16,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287302620] [2022-04-06 20:40:16,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287302620] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:16,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:16,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:16,798 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:16,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1483861976] [2022-04-06 20:40:16,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1483861976] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:16,798 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:16,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:40:16,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507467098] [2022-04-06 20:40:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:16,799 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:40:16,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:40:16,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:40:16,805 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:16,862 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-04-06 20:40:16,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:40:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-04-06 20:40:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:16,864 INFO L225 Difference]: With dead ends: 25 [2022-04-06 20:40:16,864 INFO L226 Difference]: Without dead ends: 17 [2022-04-06 20:40:16,865 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:40:16,866 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:16,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:16,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-04-06 20:40:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-04-06 20:40:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 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 20:40:16,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-04-06 20:40:16,873 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-04-06 20:40:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:16,873 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-04-06 20:40:16,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:16,874 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-04-06 20:40:16,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-04-06 20:40:16,874 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:16,875 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:16,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:40:16,875 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:16,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:16,876 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2022-04-06 20:40:16,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:16,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1828914754] [2022-04-06 20:40:16,893 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:16,894 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:16,894 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 2 times [2022-04-06 20:40:16,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:16,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381535188] [2022-04-06 20:40:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:16,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:16,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:17,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:17,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381535188] [2022-04-06 20:40:17,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381535188] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:17,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632168477] [2022-04-06 20:40:17,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:17,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:17,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:17,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:17,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 20:40:17,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:17,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:40:17,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:17,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:17,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:17,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:17,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632168477] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:17,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:17,482 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6] total 11 [2022-04-06 20:40:17,482 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:17,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1828914754] [2022-04-06 20:40:17,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1828914754] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:17,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:17,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:40:17,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979000386] [2022-04-06 20:40:17,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:17,484 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:40:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:40:17,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:40:17,485 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:17,554 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2022-04-06 20:40:17,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:40:17,555 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-04-06 20:40:17,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:17,556 INFO L225 Difference]: With dead ends: 25 [2022-04-06 20:40:17,556 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:40:17,556 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:40:17,557 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 19 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:17,558 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 28 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:17,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:40:17,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2022-04-06 20:40:17,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-04-06 20:40:17,563 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 14 [2022-04-06 20:40:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:17,566 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-04-06 20:40:17,567 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:17,567 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-04-06 20:40:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:40:17,567 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:17,567 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:17,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:17,797 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 20:40:17,798 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:17,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:17,798 INFO L85 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 1 times [2022-04-06 20:40:17,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:17,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702680568] [2022-04-06 20:40:17,801 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:17,801 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:17,801 INFO L85 PathProgramCache]: Analyzing trace with hash 309814626, now seen corresponding path program 2 times [2022-04-06 20:40:17,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:17,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261596388] [2022-04-06 20:40:17,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:17,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:17,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:17,866 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:17,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261596388] [2022-04-06 20:40:17,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261596388] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:17,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248369931] [2022-04-06 20:40:17,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:17,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:17,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:17,869 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:17,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 20:40:17,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:17,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:17,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:40:17,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:17,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:18,020 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:18,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248369931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:18,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:18,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-04-06 20:40:18,021 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:18,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702680568] [2022-04-06 20:40:18,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702680568] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:18,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:18,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:40:18,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889526066] [2022-04-06 20:40:18,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:18,022 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:40:18,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:40:18,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-04-06 20:40:18,027 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:18,085 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2022-04-06 20:40:18,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:40:18,086 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:40:18,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:18,087 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:40:18,087 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:40:18,088 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:40:18,094 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:18,094 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:40:18,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-06 20:40:18,098 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 20:40:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-04-06 20:40:18,099 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2022-04-06 20:40:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:18,099 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-04-06 20:40:18,099 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-04-06 20:40:18,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 20:40:18,100 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:18,100 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:18,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:18,300 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 20:40:18,301 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:18,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:18,301 INFO L85 PathProgramCache]: Analyzing trace with hash 2084821988, now seen corresponding path program 3 times [2022-04-06 20:40:18,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797418138] [2022-04-06 20:40:18,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:18,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:18,303 INFO L85 PathProgramCache]: Analyzing trace with hash 2084821988, now seen corresponding path program 4 times [2022-04-06 20:40:18,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:18,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833362686] [2022-04-06 20:40:18,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:18,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:18,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:18,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833362686] [2022-04-06 20:40:18,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833362686] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:18,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073760191] [2022-04-06 20:40:18,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:18,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:18,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:18,439 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:18,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 20:40:18,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:18,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:18,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:40:18,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:18,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:18,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073760191] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:18,708 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:18,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 12 [2022-04-06 20:40:18,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797418138] [2022-04-06 20:40:18,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797418138] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:18,709 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:18,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:40:18,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387057199] [2022-04-06 20:40:18,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:18,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:40:18,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:18,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:40:18,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:40:18,711 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:18,795 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-06 20:40:18,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:40:18,795 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 20:40:18,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:18,796 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:40:18,796 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:40:18,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:40:18,797 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:18,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:18,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:40:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2022-04-06 20:40:18,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 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 20:40:18,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2022-04-06 20:40:18,804 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2022-04-06 20:40:18,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:18,804 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2022-04-06 20:40:18,805 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:18,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2022-04-06 20:40:18,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:40:18,807 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:18,807 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:18,834 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:19,028 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 20:40:19,028 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:19,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1077515338, now seen corresponding path program 3 times [2022-04-06 20:40:19,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107648508] [2022-04-06 20:40:19,031 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:19,031 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1077515338, now seen corresponding path program 4 times [2022-04-06 20:40:19,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:19,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280695530] [2022-04-06 20:40:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:19,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:19,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280695530] [2022-04-06 20:40:19,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280695530] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:19,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708824836] [2022-04-06 20:40:19,139 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:19,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:19,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:19,140 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:19,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 20:40:19,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:19,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:19,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:40:19,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:19,250 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:19,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:19,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:19,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708824836] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:19,451 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:19,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 14 [2022-04-06 20:40:19,451 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:19,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107648508] [2022-04-06 20:40:19,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107648508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:19,451 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:19,451 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:40:19,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969677998] [2022-04-06 20:40:19,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:19,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:40:19,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:40:19,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:40:19,453 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:19,528 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2022-04-06 20:40:19,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:40:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 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 20 [2022-04-06 20:40:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:19,529 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:40:19,529 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:40:19,530 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:40:19,530 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 18 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:19,531 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:19,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:40:19,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 20:40:19,535 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 20:40:19,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-04-06 20:40:19,536 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2022-04-06 20:40:19,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:19,536 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-04-06 20:40:19,536 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:19,536 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-04-06 20:40:19,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-04-06 20:40:19,537 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:19,537 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:19,562 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:19,737 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 20:40:19,737 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1442444596, now seen corresponding path program 5 times [2022-04-06 20:40:19,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:19,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1872006343] [2022-04-06 20:40:19,740 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:19,740 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:19,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1442444596, now seen corresponding path program 6 times [2022-04-06 20:40:19,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:19,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775512984] [2022-04-06 20:40:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:19,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:19,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:19,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:19,872 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:19,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775512984] [2022-04-06 20:40:19,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775512984] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:19,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427354263] [2022-04-06 20:40:19,873 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:19,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:19,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:19,874 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:19,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 20:40:19,946 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:19,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:19,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:40:19,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:20,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:40:20,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427354263] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:20,250 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:20,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 17 [2022-04-06 20:40:20,250 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:20,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1872006343] [2022-04-06 20:40:20,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1872006343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:20,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:20,251 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:40:20,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825302215] [2022-04-06 20:40:20,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:20,252 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:40:20,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:40:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2022-04-06 20:40:20,253 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:20,360 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2022-04-06 20:40:20,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:40:20,360 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 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 20 [2022-04-06 20:40:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:20,361 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:40:20,361 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:40:20,361 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:40:20,362 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:20,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:20,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:40:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2022-04-06 20:40:20,370 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 20:40:20,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2022-04-06 20:40:20,371 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 20 [2022-04-06 20:40:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:20,371 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2022-04-06 20:40:20,371 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:20,372 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2022-04-06 20:40:20,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:40:20,373 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:20,373 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:20,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:20,577 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 20:40:20,577 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:20,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:20,578 INFO L85 PathProgramCache]: Analyzing trace with hash 948575330, now seen corresponding path program 5 times [2022-04-06 20:40:20,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:20,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1413965471] [2022-04-06 20:40:20,580 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:20,580 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:20,580 INFO L85 PathProgramCache]: Analyzing trace with hash 948575330, now seen corresponding path program 6 times [2022-04-06 20:40:20,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:20,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543522256] [2022-04-06 20:40:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:20,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:20,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:20,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:20,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543522256] [2022-04-06 20:40:20,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543522256] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:20,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470301344] [2022-04-06 20:40:20,672 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:20,672 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:20,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:20,673 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:20,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 20:40:20,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:40:20,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:20,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:40:20,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:20,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:20,894 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:20,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470301344] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:20,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:20,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 20:40:20,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:20,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1413965471] [2022-04-06 20:40:20,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1413965471] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:20,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:20,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:40:20,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716211841] [2022-04-06 20:40:20,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:20,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:40:20,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:20,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:40:20,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:40:20,896 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 20:40:20,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:20,985 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-04-06 20:40:20,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:40:20,987 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 20:40:20,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:20,988 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:40:20,988 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:40:20,988 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:40:20,989 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:20,989 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 29 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:20,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:40:20,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 20:40:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-04-06 20:40:20,998 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2022-04-06 20:40:20,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:20,999 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-04-06 20:40:20,999 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 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 20:40:20,999 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-04-06 20:40:21,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 20:40:21,000 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:21,000 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:21,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:21,220 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 20:40:21,221 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:21,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1571384604, now seen corresponding path program 7 times [2022-04-06 20:40:21,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:21,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670708051] [2022-04-06 20:40:21,223 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:21,223 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:21,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1571384604, now seen corresponding path program 8 times [2022-04-06 20:40:21,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:21,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563510302] [2022-04-06 20:40:21,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:21,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:21,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:21,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:21,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:21,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563510302] [2022-04-06 20:40:21,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563510302] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:21,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995136569] [2022-04-06 20:40:21,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:21,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:21,354 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:21,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 20:40:21,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:21,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:21,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:40:21,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:21,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:21,780 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:21,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995136569] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:21,781 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:21,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 10] total 22 [2022-04-06 20:40:21,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:21,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670708051] [2022-04-06 20:40:21,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670708051] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:21,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:21,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:40:21,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243983800] [2022-04-06 20:40:21,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:21,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:40:21,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:21,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:40:21,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:40:21,783 INFO L87 Difference]: Start difference. First operand 25 states and 26 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 20:40:21,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:21,934 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-04-06 20:40:21,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:40:21,935 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 20:40:21,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:21,935 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:40:21,936 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:40:21,936 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:40:21,937 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 31 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:21,937 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 38 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:21,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:40:21,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2022-04-06 20:40:21,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:21,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2022-04-06 20:40:21,945 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 23 [2022-04-06 20:40:21,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:21,946 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2022-04-06 20:40:21,946 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 20:40:21,946 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2022-04-06 20:40:21,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:40:21,947 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:21,947 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:21,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:22,147 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 20:40:22,148 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -602440374, now seen corresponding path program 7 times [2022-04-06 20:40:22,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [690278136] [2022-04-06 20:40:22,150 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:22,151 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:22,151 INFO L85 PathProgramCache]: Analyzing trace with hash -602440374, now seen corresponding path program 8 times [2022-04-06 20:40:22,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:22,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416999292] [2022-04-06 20:40:22,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:22,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:22,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:22,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416999292] [2022-04-06 20:40:22,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416999292] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:22,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352364557] [2022-04-06 20:40:22,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:22,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:22,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:22,240 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:22,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 20:40:22,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:22,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:22,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:40:22,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:22,393 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:22,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:22,490 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:22,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352364557] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:22,490 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:22,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 20:40:22,491 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:22,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [690278136] [2022-04-06 20:40:22,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [690278136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:22,491 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:22,491 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:40:22,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680557070] [2022-04-06 20:40:22,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:22,491 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:40:22,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:40:22,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:40:22,492 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:22,591 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-04-06 20:40:22,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:40:22,592 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 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 26 [2022-04-06 20:40:22,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:22,592 INFO L225 Difference]: With dead ends: 37 [2022-04-06 20:40:22,593 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:40:22,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:40:22,593 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:22,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 24 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:22,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:40:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 20:40:22,600 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 20:40:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-04-06 20:40:22,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 26 [2022-04-06 20:40:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:22,601 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-04-06 20:40:22,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-04-06 20:40:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-04-06 20:40:22,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:22,602 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:22,624 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:22,802 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 20:40:22,802 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:22,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1172566988, now seen corresponding path program 9 times [2022-04-06 20:40:22,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:22,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1589623136] [2022-04-06 20:40:22,804 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:22,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1172566988, now seen corresponding path program 10 times [2022-04-06 20:40:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:22,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784281385] [2022-04-06 20:40:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:22,942 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:22,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:22,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784281385] [2022-04-06 20:40:22,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784281385] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:22,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343168133] [2022-04-06 20:40:22,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:22,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:22,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:22,944 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:22,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 20:40:22,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:22,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:22,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:40:22,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:23,153 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:23,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:23,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343168133] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:23,406 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:23,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 9] total 22 [2022-04-06 20:40:23,406 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1589623136] [2022-04-06 20:40:23,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1589623136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:23,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:23,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:40:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609419373] [2022-04-06 20:40:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:23,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:40:23,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:40:23,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=320, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:40:23,408 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:23,552 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2022-04-06 20:40:23,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:40:23,552 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 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 26 [2022-04-06 20:40:23,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:23,553 INFO L225 Difference]: With dead ends: 37 [2022-04-06 20:40:23,553 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:40:23,553 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:40:23,554 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 37 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:23,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 18 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:23,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:40:23,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2022-04-06 20:40:23,561 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 20:40:23,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2022-04-06 20:40:23,561 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 26 [2022-04-06 20:40:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:23,562 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2022-04-06 20:40:23,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2022-04-06 20:40:23,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:40:23,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:23,563 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:23,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:23,784 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 20:40:23,785 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:23,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1653107870, now seen corresponding path program 9 times [2022-04-06 20:40:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:23,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [821354376] [2022-04-06 20:40:23,787 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:23,787 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:23,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1653107870, now seen corresponding path program 10 times [2022-04-06 20:40:23,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:23,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656042739] [2022-04-06 20:40:23,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:23,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:23,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:23,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:23,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:23,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656042739] [2022-04-06 20:40:23,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656042739] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:23,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496479771] [2022-04-06 20:40:23,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:23,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:23,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:23,878 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:23,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 20:40:23,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:23,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:23,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:40:23,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:24,019 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:24,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:24,153 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:24,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496479771] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:24,153 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:24,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:40:24,154 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:24,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [821354376] [2022-04-06 20:40:24,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [821354376] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:24,154 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:24,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:40:24,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425565296] [2022-04-06 20:40:24,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:24,155 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:40:24,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:40:24,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:40:24,155 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:40:24,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:24,299 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-04-06 20:40:24,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:40:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:40:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:24,300 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:40:24,300 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:40:24,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:40:24,301 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:24,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 44 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:24,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:40:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 20:40:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-04-06 20:40:24,311 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2022-04-06 20:40:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:24,311 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-04-06 20:40:24,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 20:40:24,311 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-04-06 20:40:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-04-06 20:40:24,312 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:24,312 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:24,335 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 20:40:24,535 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 20:40:24,536 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:24,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:24,536 INFO L85 PathProgramCache]: Analyzing trace with hash 121899492, now seen corresponding path program 11 times [2022-04-06 20:40:24,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [954961676] [2022-04-06 20:40:24,538 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:24,538 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:24,538 INFO L85 PathProgramCache]: Analyzing trace with hash 121899492, now seen corresponding path program 12 times [2022-04-06 20:40:24,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:24,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536800457] [2022-04-06 20:40:24,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:24,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:24,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:24,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536800457] [2022-04-06 20:40:24,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536800457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:24,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528091399] [2022-04-06 20:40:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:24,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:24,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:24,707 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:24,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 20:40:24,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:40:24,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:24,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:40:24,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:40:24,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:40:24,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528091399] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:24,877 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:40:24,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 14 [2022-04-06 20:40:24,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [954961676] [2022-04-06 20:40:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [954961676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:24,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:40:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851703797] [2022-04-06 20:40:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:24,879 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:40:24,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:40:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-04-06 20:40:24,879 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:24,925 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2022-04-06 20:40:24,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:40:24,926 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 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 29 [2022-04-06 20:40:24,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:24,926 INFO L225 Difference]: With dead ends: 41 [2022-04-06 20:40:24,926 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 20:40:24,927 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:40:24,927 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:24,928 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 35 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:40:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 20:40:24,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-06 20:40:24,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2022-04-06 20:40:24,937 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2022-04-06 20:40:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:24,938 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2022-04-06 20:40:24,938 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2022-04-06 20:40:24,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 20:40:24,939 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:24,939 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:24,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:25,143 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 20:40:25,143 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:25,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:25,144 INFO L85 PathProgramCache]: Analyzing trace with hash -366827958, now seen corresponding path program 11 times [2022-04-06 20:40:25,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:25,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1837294730] [2022-04-06 20:40:25,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:25,148 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:25,148 INFO L85 PathProgramCache]: Analyzing trace with hash -366827958, now seen corresponding path program 12 times [2022-04-06 20:40:25,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:25,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228287949] [2022-04-06 20:40:25,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:25,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:25,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:25,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:25,251 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:25,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:25,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228287949] [2022-04-06 20:40:25,251 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228287949] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:25,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605675796] [2022-04-06 20:40:25,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:25,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:25,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:25,253 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:25,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 20:40:25,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:25,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:25,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:40:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 20:40:25,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 30 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-04-06 20:40:25,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605675796] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:25,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:25,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 7] total 19 [2022-04-06 20:40:25,621 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:25,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1837294730] [2022-04-06 20:40:25,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1837294730] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:25,622 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:25,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:40:25,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483209652] [2022-04-06 20:40:25,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:25,622 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:40:25,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:40:25,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:40:25,623 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:25,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:25,798 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2022-04-06 20:40:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:40:25,799 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 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 32 [2022-04-06 20:40:25,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:25,799 INFO L225 Difference]: With dead ends: 47 [2022-04-06 20:40:25,799 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 20:40:25,800 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-04-06 20:40:25,800 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:25,801 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:25,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 20:40:25,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2022-04-06 20:40:25,809 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 20:40:25,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2022-04-06 20:40:25,812 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 32 [2022-04-06 20:40:25,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:25,812 INFO L478 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2022-04-06 20:40:25,813 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2022-04-06 20:40:25,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-04-06 20:40:25,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:25,814 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:25,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:26,030 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 20:40:26,030 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:26,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:26,031 INFO L85 PathProgramCache]: Analyzing trace with hash -500184478, now seen corresponding path program 13 times [2022-04-06 20:40:26,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:26,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1761305485] [2022-04-06 20:40:26,032 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:26,032 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:26,032 INFO L85 PathProgramCache]: Analyzing trace with hash -500184478, now seen corresponding path program 14 times [2022-04-06 20:40:26,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:26,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072425237] [2022-04-06 20:40:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:26,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:26,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:26,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:26,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072425237] [2022-04-06 20:40:26,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072425237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:26,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21551381] [2022-04-06 20:40:26,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:26,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:26,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:26,168 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:26,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 20:40:26,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 20:40:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:26,326 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:26,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:26,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21551381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:26,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:26,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 20 [2022-04-06 20:40:26,524 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:26,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1761305485] [2022-04-06 20:40:26,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1761305485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:26,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:26,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:40:26,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245264376] [2022-04-06 20:40:26,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:26,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:40:26,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:26,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:40:26,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2022-04-06 20:40:26,526 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:40:26,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:26,743 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2022-04-06 20:40:26,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:40:26,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:40:26,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:26,744 INFO L225 Difference]: With dead ends: 50 [2022-04-06 20:40:26,744 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 20:40:26,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:40:26,745 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:26,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 54 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:26,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 20:40:26,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-04-06 20:40:26,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:26,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2022-04-06 20:40:26,756 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 35 [2022-04-06 20:40:26,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:26,756 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2022-04-06 20:40:26,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 20:40:26,756 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2022-04-06 20:40:26,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 20:40:26,757 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:26,757 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:26,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:26,971 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 20:40:26,971 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:26,972 INFO L85 PathProgramCache]: Analyzing trace with hash -479522998, now seen corresponding path program 15 times [2022-04-06 20:40:26,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:26,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220972125] [2022-04-06 20:40:26,973 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:26,973 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:26,973 INFO L85 PathProgramCache]: Analyzing trace with hash -479522998, now seen corresponding path program 16 times [2022-04-06 20:40:26,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:26,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791232349] [2022-04-06 20:40:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:26,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:27,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:27,133 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:27,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791232349] [2022-04-06 20:40:27,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791232349] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:27,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707863982] [2022-04-06 20:40:27,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:27,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:27,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:27,135 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:27,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 20:40:27,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:27,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:27,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 20:40:27,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:27,436 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:27,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:27,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707863982] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:27,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:27,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 32 [2022-04-06 20:40:27,753 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:27,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220972125] [2022-04-06 20:40:27,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220972125] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:27,753 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:27,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:40:27,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114165007] [2022-04-06 20:40:27,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:27,754 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:40:27,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:27,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:40:27,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:40:27,755 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:28,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:28,023 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2022-04-06 20:40:28,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:40:28,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 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 38 [2022-04-06 20:40:28,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:28,024 INFO L225 Difference]: With dead ends: 53 [2022-04-06 20:40:28,024 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 20:40:28,025 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=1402, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 20:40:28,026 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 36 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:28,026 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 19 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 20:40:28,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2022-04-06 20:40:28,037 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 20:40:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2022-04-06 20:40:28,037 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 38 [2022-04-06 20:40:28,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:28,037 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2022-04-06 20:40:28,038 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:28,038 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2022-04-06 20:40:28,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 20:40:28,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:28,038 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:28,063 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 20:40:28,259 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 20:40:28,259 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:28,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:28,260 INFO L85 PathProgramCache]: Analyzing trace with hash 866304354, now seen corresponding path program 17 times [2022-04-06 20:40:28,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:28,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [569259994] [2022-04-06 20:40:28,262 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:28,262 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:28,262 INFO L85 PathProgramCache]: Analyzing trace with hash 866304354, now seen corresponding path program 18 times [2022-04-06 20:40:28,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:28,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180112384] [2022-04-06 20:40:28,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:28,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:28,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:28,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 19 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:28,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180112384] [2022-04-06 20:40:28,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180112384] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:28,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525445711] [2022-04-06 20:40:28,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:28,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:28,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:28,423 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:28,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 20:40:28,499 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:28,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:28,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:40:28,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:28,677 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 2 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 20:40:28,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2022-04-06 20:40:28,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525445711] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:28,894 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:28,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6, 7] total 22 [2022-04-06 20:40:28,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:28,896 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [569259994] [2022-04-06 20:40:28,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [569259994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:28,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:28,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:40:28,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961971951] [2022-04-06 20:40:28,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:28,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:40:28,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:40:28,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=391, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:40:28,897 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:40:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:29,163 INFO L93 Difference]: Finished difference Result 56 states and 59 transitions. [2022-04-06 20:40:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:40:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:40:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:29,163 INFO L225 Difference]: With dead ends: 56 [2022-04-06 20:40:29,163 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 20:40:29,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:40:29,164 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:29,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 64 Invalid, 337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:40:29,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 20:40:29,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 20:40:29,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:29,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2022-04-06 20:40:29,175 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2022-04-06 20:40:29,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:29,180 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2022-04-06 20:40:29,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 20:40:29,180 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2022-04-06 20:40:29,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 20:40:29,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:29,181 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:29,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-04-06 20:40:29,384 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 20:40:29,385 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:29,385 INFO L85 PathProgramCache]: Analyzing trace with hash 889239626, now seen corresponding path program 19 times [2022-04-06 20:40:29,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:29,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1996993606] [2022-04-06 20:40:29,387 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:29,387 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash 889239626, now seen corresponding path program 20 times [2022-04-06 20:40:29,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:29,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724398410] [2022-04-06 20:40:29,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:29,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:29,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:29,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:29,553 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:29,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:29,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724398410] [2022-04-06 20:40:29,553 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724398410] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:29,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549322082] [2022-04-06 20:40:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:29,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:29,555 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:29,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 20:40:29,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:29,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:29,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 20:40:29,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:29,940 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:29,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:30,425 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:30,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549322082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:30,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:30,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2022-04-06 20:40:30,426 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:30,426 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1996993606] [2022-04-06 20:40:30,426 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1996993606] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:30,426 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:30,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:40:30,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419439411] [2022-04-06 20:40:30,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:30,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:40:30,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:30,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:40:30,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1023, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 20:40:30,428 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:30,742 INFO L93 Difference]: Finished difference Result 59 states and 62 transitions. [2022-04-06 20:40:30,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:40:30,742 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 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 44 [2022-04-06 20:40:30,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:30,743 INFO L225 Difference]: With dead ends: 59 [2022-04-06 20:40:30,743 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 20:40:30,744 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:40:30,744 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:30,745 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 344 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:40:30,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 20:40:30,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2022-04-06 20:40:30,763 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 20:40:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2022-04-06 20:40:30,763 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 44 [2022-04-06 20:40:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:30,764 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2022-04-06 20:40:30,764 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:30,764 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2022-04-06 20:40:30,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 20:40:30,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:30,764 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:30,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:30,980 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 20:40:30,980 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:30,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:30,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1254127714, now seen corresponding path program 21 times [2022-04-06 20:40:30,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:30,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [612514830] [2022-04-06 20:40:30,982 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:30,982 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1254127714, now seen corresponding path program 22 times [2022-04-06 20:40:30,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:30,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404101428] [2022-04-06 20:40:30,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:30,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:31,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:31,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404101428] [2022-04-06 20:40:31,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404101428] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:31,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511517584] [2022-04-06 20:40:31,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:31,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:31,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:31,142 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:31,145 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 20:40:31,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:31,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:31,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 20:40:31,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:31,360 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 23 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:31,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:32,058 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:32,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511517584] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:32,058 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:32,058 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 17] total 32 [2022-04-06 20:40:32,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:32,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [612514830] [2022-04-06 20:40:32,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [612514830] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:32,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:32,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:40:32,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526063139] [2022-04-06 20:40:32,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:32,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:40:32,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:32,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:40:32,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2022-04-06 20:40:32,060 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:40:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:32,386 INFO L93 Difference]: Finished difference Result 62 states and 65 transitions. [2022-04-06 20:40:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:40:32,387 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:40:32,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:32,387 INFO L225 Difference]: With dead ends: 62 [2022-04-06 20:40:32,387 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 20:40:32,388 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=485, Invalid=1407, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:40:32,388 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:32,388 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 64 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:40:32,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 20:40:32,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-04-06 20:40:32,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:32,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2022-04-06 20:40:32,400 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 47 [2022-04-06 20:40:32,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:32,400 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2022-04-06 20:40:32,400 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 14 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 20:40:32,400 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2022-04-06 20:40:32,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-04-06 20:40:32,400 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:32,400 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:32,416 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 20:40:32,600 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 20:40:32,601 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:32,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:32,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1072931146, now seen corresponding path program 23 times [2022-04-06 20:40:32,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:32,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305335524] [2022-04-06 20:40:32,602 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:32,603 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1072931146, now seen corresponding path program 24 times [2022-04-06 20:40:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431392575] [2022-04-06 20:40:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:32,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:32,769 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:32,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:32,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431392575] [2022-04-06 20:40:32,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431392575] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:32,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470075785] [2022-04-06 20:40:32,770 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:32,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:32,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:32,771 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:32,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 20:40:32,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:32,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:40:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 2 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 20:40:33,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2022-04-06 20:40:33,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470075785] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:33,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:33,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 7, 8] total 27 [2022-04-06 20:40:33,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:33,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305335524] [2022-04-06 20:40:33,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305335524] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:33,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:33,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:40:33,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429734845] [2022-04-06 20:40:33,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:33,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:40:33,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:33,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:40:33,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:40:33,544 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:33,914 INFO L93 Difference]: Finished difference Result 65 states and 68 transitions. [2022-04-06 20:40:33,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:40:33,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 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 50 [2022-04-06 20:40:33,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:33,915 INFO L225 Difference]: With dead ends: 65 [2022-04-06 20:40:33,915 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 20:40:33,916 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:40:33,916 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:33,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 39 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:40:33,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 20:40:33,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2022-04-06 20:40:33,929 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 20:40:33,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2022-04-06 20:40:33,929 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 50 [2022-04-06 20:40:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:33,930 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2022-04-06 20:40:33,930 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2022-04-06 20:40:33,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 20:40:33,930 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:33,930 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:33,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:34,135 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 20:40:34,135 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:34,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:34,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1819864930, now seen corresponding path program 25 times [2022-04-06 20:40:34,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:34,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1275206777] [2022-04-06 20:40:34,137 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:34,137 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:34,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1819864930, now seen corresponding path program 26 times [2022-04-06 20:40:34,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:34,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190155048] [2022-04-06 20:40:34,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:34,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:34,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190155048] [2022-04-06 20:40:34,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190155048] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:34,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867655666] [2022-04-06 20:40:34,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:34,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:34,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:34,363 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:34,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 20:40:34,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:34,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:34,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 20:40:34,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 27 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:34,761 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:35,628 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:35,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867655666] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:35,628 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:35,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 19] total 48 [2022-04-06 20:40:35,629 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:35,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1275206777] [2022-04-06 20:40:35,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1275206777] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:35,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:35,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:40:35,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613309519] [2022-04-06 20:40:35,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:35,629 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:40:35,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:35,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:40:35,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1672, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:40:35,630 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 20:40:36,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:36,104 INFO L93 Difference]: Finished difference Result 68 states and 71 transitions. [2022-04-06 20:40:36,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:40:36,104 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 20:40:36,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:36,105 INFO L225 Difference]: With dead ends: 68 [2022-04-06 20:40:36,105 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 20:40:36,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=876, Invalid=2906, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:40:36,107 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:36,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 74 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:40:36,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 20:40:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 20:40:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2022-04-06 20:40:36,120 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2022-04-06 20:40:36,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:36,121 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2022-04-06 20:40:36,121 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 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 20:40:36,121 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2022-04-06 20:40:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 20:40:36,121 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:36,121 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:36,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:36,335 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 20:40:36,335 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:36,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:36,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1498663498, now seen corresponding path program 27 times [2022-04-06 20:40:36,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1316008741] [2022-04-06 20:40:36,337 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:36,337 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:36,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1498663498, now seen corresponding path program 28 times [2022-04-06 20:40:36,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:36,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124766911] [2022-04-06 20:40:36,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:36,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:36,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:36,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:36,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:36,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124766911] [2022-04-06 20:40:36,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124766911] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:36,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402801731] [2022-04-06 20:40:36,612 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:36,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:36,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:36,613 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:36,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 20:40:36,659 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:36,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:40:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:37,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:37,770 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 29 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:37,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402801731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:37,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 50 [2022-04-06 20:40:37,771 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1316008741] [2022-04-06 20:40:37,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1316008741] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:37,771 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:37,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:40:37,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410674604] [2022-04-06 20:40:37,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:37,772 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:40:37,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:37,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:40:37,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=1811, Unknown=0, NotChecked=0, Total=2450 [2022-04-06 20:40:37,773 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:38,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:38,223 INFO L93 Difference]: Finished difference Result 71 states and 74 transitions. [2022-04-06 20:40:38,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:40:38,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 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 56 [2022-04-06 20:40:38,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:38,225 INFO L225 Difference]: With dead ends: 71 [2022-04-06 20:40:38,225 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 20:40:38,226 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=967, Invalid=3193, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:40:38,227 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 54 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:38,227 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 59 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:40:38,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 20:40:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 20:40:38,238 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 20:40:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2022-04-06 20:40:38,238 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 56 [2022-04-06 20:40:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:38,239 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2022-04-06 20:40:38,239 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2022-04-06 20:40:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 20:40:38,239 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:38,239 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:38,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 20:40:38,439 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 20:40:38,440 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:38,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:38,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1773938274, now seen corresponding path program 29 times [2022-04-06 20:40:38,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:38,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2079102825] [2022-04-06 20:40:38,442 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:38,442 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:38,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1773938274, now seen corresponding path program 30 times [2022-04-06 20:40:38,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:38,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979580986] [2022-04-06 20:40:38,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:38,688 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 31 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:38,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:38,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979580986] [2022-04-06 20:40:38,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979580986] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:38,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75355649] [2022-04-06 20:40:38,689 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:38,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:38,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:38,690 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:38,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 20:40:38,742 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:38,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:38,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:40:38,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:38,977 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 73 proven. 2 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 20:40:38,977 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 75 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 20:40:39,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75355649] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:39,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:39,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7, 8] total 30 [2022-04-06 20:40:39,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:39,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2079102825] [2022-04-06 20:40:39,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2079102825] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:39,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:39,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:40:39,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079606001] [2022-04-06 20:40:39,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:39,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:40:39,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:40:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:40:39,450 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 20:40:39,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:39,929 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-04-06 20:40:39,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:40:39,930 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 20:40:39,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:39,930 INFO L225 Difference]: With dead ends: 74 [2022-04-06 20:40:39,930 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 20:40:39,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=295, Invalid=1775, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:40:39,931 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:39,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 84 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:40:39,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 20:40:39,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2022-04-06 20:40:39,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:39,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2022-04-06 20:40:39,943 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 59 [2022-04-06 20:40:39,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:39,943 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2022-04-06 20:40:39,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 20:40:39,943 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2022-04-06 20:40:39,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-04-06 20:40:39,944 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:39,944 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:39,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 20:40:40,145 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 20:40:40,146 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:40,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:40,146 INFO L85 PathProgramCache]: Analyzing trace with hash -902745270, now seen corresponding path program 31 times [2022-04-06 20:40:40,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:40,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [274880937] [2022-04-06 20:40:40,149 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:40,149 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash -902745270, now seen corresponding path program 32 times [2022-04-06 20:40:40,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:40,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340643431] [2022-04-06 20:40:40,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:40,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:40,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:40,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340643431] [2022-04-06 20:40:40,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340643431] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:40,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164889294] [2022-04-06 20:40:40,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:40,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:40,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:40,441 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:40,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 20:40:40,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:40,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:40,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 20:40:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:40,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 33 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:41,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164889294] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:41,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:41,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 20] total 39 [2022-04-06 20:40:41,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:41,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [274880937] [2022-04-06 20:40:41,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [274880937] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:41,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:41,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:40:41,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238543132] [2022-04-06 20:40:41,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:41,511 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:40:41,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:41,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:40:41,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1065, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:40:41,512 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:42,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:42,032 INFO L93 Difference]: Finished difference Result 77 states and 80 transitions. [2022-04-06 20:40:42,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:40:42,033 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 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 62 [2022-04-06 20:40:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:42,034 INFO L225 Difference]: With dead ends: 77 [2022-04-06 20:40:42,034 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 20:40:42,035 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:40:42,035 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 824 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:42,035 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 44 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 824 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:40:42,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 20:40:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2022-04-06 20:40:42,050 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 20:40:42,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2022-04-06 20:40:42,051 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 62 [2022-04-06 20:40:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:42,051 INFO L478 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2022-04-06 20:40:42,051 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2022-04-06 20:40:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 20:40:42,052 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:42,052 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:42,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-04-06 20:40:42,255 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 20:40:42,255 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:42,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1619387038, now seen corresponding path program 33 times [2022-04-06 20:40:42,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:42,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1263517510] [2022-04-06 20:40:42,257 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:42,257 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:42,257 INFO L85 PathProgramCache]: Analyzing trace with hash -1619387038, now seen corresponding path program 34 times [2022-04-06 20:40:42,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:42,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491188855] [2022-04-06 20:40:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:42,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:42,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:42,533 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:42,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491188855] [2022-04-06 20:40:42,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491188855] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:42,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355567285] [2022-04-06 20:40:42,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:42,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:42,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:42,534 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:42,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 20:40:42,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:42,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:42,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 20:40:42,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:42,840 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 35 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:42,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:44,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355567285] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:44,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:44,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 23] total 44 [2022-04-06 20:40:44,047 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:44,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1263517510] [2022-04-06 20:40:44,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1263517510] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:44,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:44,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:40:44,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447908309] [2022-04-06 20:40:44,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:44,048 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:40:44,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:40:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1405, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:40:44,049 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 20:40:44,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:44,636 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2022-04-06 20:40:44,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:40:44,636 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 20:40:44,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:44,637 INFO L225 Difference]: With dead ends: 80 [2022-04-06 20:40:44,637 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 20:40:44,638 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=935, Invalid=2847, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:40:44,639 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:44,639 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 1033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:40:44,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 20:40:44,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-04-06 20:40:44,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:44,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2022-04-06 20:40:44,656 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2022-04-06 20:40:44,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:44,656 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2022-04-06 20:40:44,656 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 20:40:44,656 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2022-04-06 20:40:44,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-04-06 20:40:44,657 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:44,657 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:44,683 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 20:40:44,872 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 20:40:44,872 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:44,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:44,872 INFO L85 PathProgramCache]: Analyzing trace with hash -811869110, now seen corresponding path program 35 times [2022-04-06 20:40:44,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:44,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [173139570] [2022-04-06 20:40:44,874 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:44,874 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:44,874 INFO L85 PathProgramCache]: Analyzing trace with hash -811869110, now seen corresponding path program 36 times [2022-04-06 20:40:44,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:44,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343942978] [2022-04-06 20:40:44,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:44,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:45,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:45,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 37 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:45,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343942978] [2022-04-06 20:40:45,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343942978] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:45,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031301779] [2022-04-06 20:40:45,173 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:45,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:45,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:45,174 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:45,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 20:40:45,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:45,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:40:45,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 88 proven. 2 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 20:40:45,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 20:40:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031301779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:46,028 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:46,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 8] total 33 [2022-04-06 20:40:46,028 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:46,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [173139570] [2022-04-06 20:40:46,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [173139570] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:46,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:46,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:40:46,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671289159] [2022-04-06 20:40:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:46,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:40:46,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:46,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:40:46,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:40:46,030 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:46,645 INFO L93 Difference]: Finished difference Result 83 states and 86 transitions. [2022-04-06 20:40:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:40:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 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 68 [2022-04-06 20:40:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:46,646 INFO L225 Difference]: With dead ends: 83 [2022-04-06 20:40:46,646 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 20:40:46,647 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 127 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=340, Invalid=2312, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:40:46,647 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 66 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:46,649 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 69 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 20:40:46,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2022-04-06 20:40:46,662 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 20:40:46,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2022-04-06 20:40:46,662 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 68 [2022-04-06 20:40:46,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:46,663 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2022-04-06 20:40:46,663 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:46,663 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2022-04-06 20:40:46,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-04-06 20:40:46,663 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:46,664 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:46,681 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 20:40:46,868 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 20:40:46,868 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:46,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:46,868 INFO L85 PathProgramCache]: Analyzing trace with hash -157100958, now seen corresponding path program 37 times [2022-04-06 20:40:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:46,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [636505327] [2022-04-06 20:40:46,870 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:46,870 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -157100958, now seen corresponding path program 38 times [2022-04-06 20:40:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:46,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187270493] [2022-04-06 20:40:46,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:46,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:47,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:47,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:47,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:47,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187270493] [2022-04-06 20:40:47,224 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187270493] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:47,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208244063] [2022-04-06 20:40:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:47,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:47,225 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:47,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 20:40:47,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:47,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:47,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 20:40:47,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:47,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:48,886 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:48,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1208244063] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:48,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:48,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 25] total 48 [2022-04-06 20:40:48,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:48,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [636505327] [2022-04-06 20:40:48,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [636505327] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:48,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:48,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:40:48,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832661632] [2022-04-06 20:40:48,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:48,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:40:48,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:48,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:40:48,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1677, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:40:48,889 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 20:40:49,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:49,571 INFO L93 Difference]: Finished difference Result 86 states and 89 transitions. [2022-04-06 20:40:49,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:40:49,571 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 20:40:49,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:49,572 INFO L225 Difference]: With dead ends: 86 [2022-04-06 20:40:49,572 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 20:40:49,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1117, Invalid=3439, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:49,574 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1160 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 1201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:49,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 59 Invalid, 1201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:49,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 20:40:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2022-04-06 20:40:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2022-04-06 20:40:49,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 71 [2022-04-06 20:40:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:49,587 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2022-04-06 20:40:49,587 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 20:40:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2022-04-06 20:40:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 20:40:49,587 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:49,587 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:49,603 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-04-06 20:40:49,788 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 20:40:49,788 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:49,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:49,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1700543158, now seen corresponding path program 39 times [2022-04-06 20:40:49,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:49,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [561583348] [2022-04-06 20:40:49,790 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:49,790 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:49,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1700543158, now seen corresponding path program 40 times [2022-04-06 20:40:49,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:49,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927615467] [2022-04-06 20:40:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:49,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:50,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:50,115 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927615467] [2022-04-06 20:40:50,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927615467] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095055352] [2022-04-06 20:40:50,116 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:50,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:50,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:50,117 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:50,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 20:40:50,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:50,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:50,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:40:50,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:50,841 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:50,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 41 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:52,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095055352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:52,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:52,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 68 [2022-04-06 20:40:52,060 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:52,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [561583348] [2022-04-06 20:40:52,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [561583348] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:52,060 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:52,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:40:52,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578653817] [2022-04-06 20:40:52,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:52,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:40:52,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:52,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:40:52,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=3413, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:40:52,062 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:52,780 INFO L93 Difference]: Finished difference Result 89 states and 92 transitions. [2022-04-06 20:40:52,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:40:52,780 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 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 74 [2022-04-06 20:40:52,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:52,781 INFO L225 Difference]: With dead ends: 89 [2022-04-06 20:40:52,781 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 20:40:52,782 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1871 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1729, Invalid=6103, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:40:52,782 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 72 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:52,783 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 74 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 20:40:52,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 20:40:52,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2022-04-06 20:40:52,808 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 20:40:52,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2022-04-06 20:40:52,808 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 74 [2022-04-06 20:40:52,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:52,809 INFO L478 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2022-04-06 20:40:52,809 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 23 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:52,809 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2022-04-06 20:40:52,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-04-06 20:40:52,809 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:52,809 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:52,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-04-06 20:40:53,010 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 20:40:53,010 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:53,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:53,010 INFO L85 PathProgramCache]: Analyzing trace with hash -467252382, now seen corresponding path program 41 times [2022-04-06 20:40:53,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:53,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [498029667] [2022-04-06 20:40:53,012 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:53,012 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:53,012 INFO L85 PathProgramCache]: Analyzing trace with hash -467252382, now seen corresponding path program 42 times [2022-04-06 20:40:53,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:53,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949901645] [2022-04-06 20:40:53,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:53,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:53,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:53,427 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 43 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:53,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:53,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949901645] [2022-04-06 20:40:53,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949901645] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:53,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802585478] [2022-04-06 20:40:53,428 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:40:53,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:53,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:53,429 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:53,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 20:40:53,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:40:53,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:53,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:40:53,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 103 proven. 2 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2022-04-06 20:40:53,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 293 proven. 105 refuted. 0 times theorem prover too weak. 317 trivial. 0 not checked. [2022-04-06 20:40:54,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802585478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:54,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:54,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 7] total 34 [2022-04-06 20:40:54,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:54,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [498029667] [2022-04-06 20:40:54,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [498029667] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:54,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:54,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:40:54,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43101796] [2022-04-06 20:40:54,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:54,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:40:54,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:54,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:40:54,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:40:54,041 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 20:40:54,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:54,880 INFO L93 Difference]: Finished difference Result 92 states and 95 transitions. [2022-04-06 20:40:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:40:54,880 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 20:40:54,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:54,880 INFO L225 Difference]: With dead ends: 92 [2022-04-06 20:40:54,881 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 20:40:54,881 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=237, Invalid=2843, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:40:54,882 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 1483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:54,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 89 Invalid, 1483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 20:40:54,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2022-04-06 20:40:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:54,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2022-04-06 20:40:54,896 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2022-04-06 20:40:54,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:54,896 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2022-04-06 20:40:54,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 24 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 20:40:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2022-04-06 20:40:54,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 20:40:54,897 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:54,897 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:54,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-04-06 20:40:55,101 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 20:40:55,101 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:55,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:55,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1348005450, now seen corresponding path program 43 times [2022-04-06 20:40:55,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:55,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168235312] [2022-04-06 20:40:55,103 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:55,103 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:55,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1348005450, now seen corresponding path program 44 times [2022-04-06 20:40:55,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:55,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198086705] [2022-04-06 20:40:55,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:55,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:55,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:55,518 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:55,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:55,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198086705] [2022-04-06 20:40:55,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198086705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:55,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35443071] [2022-04-06 20:40:55,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:40:55,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:55,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:55,523 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:55,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 20:40:55,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:40:55,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:55,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 20:40:55,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:56,495 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:56,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:40:57,775 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 45 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:57,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35443071] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:40:57,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:40:57,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2022-04-06 20:40:57,776 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:40:57,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168235312] [2022-04-06 20:40:57,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168235312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:40:57,776 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:40:57,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:40:57,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084202522] [2022-04-06 20:40:57,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:40:57,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:40:57,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:57,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:40:57,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1343, Invalid=4059, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:40:57,778 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:40:58,641 INFO L93 Difference]: Finished difference Result 95 states and 98 transitions. [2022-04-06 20:40:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:40:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 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 80 [2022-04-06 20:40:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:40:58,641 INFO L225 Difference]: With dead ends: 95 [2022-04-06 20:40:58,642 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 20:40:58,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2233 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2031, Invalid=7281, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:40:58,643 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1604 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:40:58,643 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 119 Invalid, 1651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1604 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 20:40:58,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 20:40:58,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2022-04-06 20:40:58,657 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 20:40:58,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2022-04-06 20:40:58,658 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 80 [2022-04-06 20:40:58,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:40:58,658 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2022-04-06 20:40:58,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:40:58,658 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2022-04-06 20:40:58,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 20:40:58,658 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:40:58,658 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:40:58,674 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 20:40:58,860 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 20:40:58,860 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:40:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:40:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1760854626, now seen corresponding path program 45 times [2022-04-06 20:40:58,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:40:58,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [491106112] [2022-04-06 20:40:58,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:40:58,862 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:40:58,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1760854626, now seen corresponding path program 46 times [2022-04-06 20:40:58,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:40:58,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915326269] [2022-04-06 20:40:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:40:58,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:40:58,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:59,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:40:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:40:59,258 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 47 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:59,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:40:59,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915326269] [2022-04-06 20:40:59,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915326269] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:40:59,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879124962] [2022-04-06 20:40:59,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:40:59,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:40:59,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:40:59,272 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:40:59,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 20:40:59,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:40:59,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:40:59,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 20:40:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:40:59,641 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 47 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:40:59,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:01,524 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:01,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879124962] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:01,525 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:01,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 29] total 56 [2022-04-06 20:41:01,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:01,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [491106112] [2022-04-06 20:41:01,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [491106112] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:01,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:01,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:41:01,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741224528] [2022-04-06 20:41:01,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:01,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:41:01,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:01,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:41:01,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2293, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:41:01,526 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 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 20:41:02,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:02,456 INFO L93 Difference]: Finished difference Result 98 states and 101 transitions. [2022-04-06 20:41:02,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:41:02,456 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 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 20:41:02,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:02,457 INFO L225 Difference]: With dead ends: 98 [2022-04-06 20:41:02,457 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 20:41:02,457 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1529, Invalid=4791, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:41:02,458 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1752 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:02,458 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 129 Invalid, 1801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1752 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 20:41:02,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2022-04-06 20:41:02,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2022-04-06 20:41:02,473 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 83 [2022-04-06 20:41:02,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:02,474 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2022-04-06 20:41:02,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.925925925925926) internal successors, (79), 26 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 20:41:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2022-04-06 20:41:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 20:41:02,474 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:02,474 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:02,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 20:41:02,675 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 20:41:02,675 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:02,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:02,676 INFO L85 PathProgramCache]: Analyzing trace with hash 164321098, now seen corresponding path program 47 times [2022-04-06 20:41:02,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:02,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [117715193] [2022-04-06 20:41:02,677 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:02,677 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash 164321098, now seen corresponding path program 48 times [2022-04-06 20:41:02,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:02,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11983634] [2022-04-06 20:41:02,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:02,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:03,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:03,086 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 49 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:03,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:03,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11983634] [2022-04-06 20:41:03,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11983634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:03,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705332080] [2022-04-06 20:41:03,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:03,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:03,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:03,087 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:03,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 20:41:03,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:03,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:03,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:41:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 118 proven. 2 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-04-06 20:41:03,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2022-04-06 20:41:04,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705332080] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:04,193 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:04,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 7, 8] total 39 [2022-04-06 20:41:04,193 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:04,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [117715193] [2022-04-06 20:41:04,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [117715193] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:04,194 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:04,194 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:41:04,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212621967] [2022-04-06 20:41:04,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:04,194 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:41:04,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:41:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1275, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:41:04,195 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:05,173 INFO L93 Difference]: Finished difference Result 101 states and 104 transitions. [2022-04-06 20:41:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:41:05,174 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 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 86 [2022-04-06 20:41:05,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:05,174 INFO L225 Difference]: With dead ends: 101 [2022-04-06 20:41:05,174 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 20:41:05,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=430, Invalid=3602, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:41:05,176 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:05,176 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 84 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 20:41:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2022-04-06 20:41:05,194 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 20:41:05,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2022-04-06 20:41:05,194 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 86 [2022-04-06 20:41:05,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:05,194 INFO L478 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2022-04-06 20:41:05,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 27 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:05,195 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2022-04-06 20:41:05,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 20:41:05,195 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:05,195 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:05,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 20:41:05,397 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 20:41:05,397 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:05,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:05,397 INFO L85 PathProgramCache]: Analyzing trace with hash 301824354, now seen corresponding path program 49 times [2022-04-06 20:41:05,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:05,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [83103847] [2022-04-06 20:41:05,399 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:05,399 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:05,399 INFO L85 PathProgramCache]: Analyzing trace with hash 301824354, now seen corresponding path program 50 times [2022-04-06 20:41:05,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:05,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372344543] [2022-04-06 20:41:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:05,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:05,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:05,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:05,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:05,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:05,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372344543] [2022-04-06 20:41:05,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372344543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:05,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898709050] [2022-04-06 20:41:05,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:05,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:05,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:05,916 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:05,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 20:41:05,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:05,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:05,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 20:41:05,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:06,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 51 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:08,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898709050] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:08,531 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:08,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 83 [2022-04-06 20:41:08,531 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:08,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [83103847] [2022-04-06 20:41:08,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [83103847] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:08,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:08,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:41:08,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497415947] [2022-04-06 20:41:08,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:08,532 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:41:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:41:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1673, Invalid=5133, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:41:08,538 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 20:41:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:09,591 INFO L93 Difference]: Finished difference Result 104 states and 107 transitions. [2022-04-06 20:41:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:41:09,592 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 20:41:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:09,592 INFO L225 Difference]: With dead ends: 104 [2022-04-06 20:41:09,592 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 20:41:09,594 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2836 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2529, Invalid=9243, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:41:09,594 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2000 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:09,594 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 94 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2000 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 20:41:09,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 20:41:09,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2022-04-06 20:41:09,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:09,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2022-04-06 20:41:09,613 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2022-04-06 20:41:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:09,613 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2022-04-06 20:41:09,614 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 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 20:41:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2022-04-06 20:41:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 20:41:09,614 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:09,614 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:09,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-04-06 20:41:09,821 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 20:41:09,821 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:09,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:09,822 INFO L85 PathProgramCache]: Analyzing trace with hash -737476534, now seen corresponding path program 51 times [2022-04-06 20:41:09,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:09,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333279721] [2022-04-06 20:41:09,823 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:09,823 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:09,823 INFO L85 PathProgramCache]: Analyzing trace with hash -737476534, now seen corresponding path program 52 times [2022-04-06 20:41:09,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:09,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28407280] [2022-04-06 20:41:09,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:09,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:09,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:10,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:10,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:10,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:10,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28407280] [2022-04-06 20:41:10,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28407280] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:10,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582680940] [2022-04-06 20:41:10,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:10,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:10,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:10,320 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:10,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 20:41:10,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:10,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:10,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 59 conjunts are in the unsatisfiable core [2022-04-06 20:41:10,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 53 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:10,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:12,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582680940] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:12,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:12,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 32] total 62 [2022-04-06 20:41:12,854 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:12,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333279721] [2022-04-06 20:41:12,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333279721] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:12,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:12,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:41:12,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289066395] [2022-04-06 20:41:12,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:12,855 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:41:12,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:12,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:41:12,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2818, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:41:12,856 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:14,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:14,061 INFO L93 Difference]: Finished difference Result 107 states and 110 transitions. [2022-04-06 20:41:14,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:41:14,061 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 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 92 [2022-04-06 20:41:14,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:14,063 INFO L225 Difference]: With dead ends: 107 [2022-04-06 20:41:14,063 INFO L226 Difference]: Without dead ends: 97 [2022-04-06 20:41:14,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 154 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1880, Invalid=5952, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:41:14,064 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2220 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 2220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:14,064 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 149 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 2220 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 20:41:14,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-04-06 20:41:14,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2022-04-06 20:41:14,083 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 20:41:14,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2022-04-06 20:41:14,083 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 92 [2022-04-06 20:41:14,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:14,083 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2022-04-06 20:41:14,084 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.933333333333333) internal successors, (88), 29 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:14,084 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2022-04-06 20:41:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-04-06 20:41:14,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:14,084 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:14,101 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-04-06 20:41:14,286 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 20:41:14,286 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:14,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:14,287 INFO L85 PathProgramCache]: Analyzing trace with hash -130994078, now seen corresponding path program 53 times [2022-04-06 20:41:14,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:14,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1407644252] [2022-04-06 20:41:14,288 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:14,288 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:14,288 INFO L85 PathProgramCache]: Analyzing trace with hash -130994078, now seen corresponding path program 54 times [2022-04-06 20:41:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:14,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371963085] [2022-04-06 20:41:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:14,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:14,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 55 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:14,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371963085] [2022-04-06 20:41:14,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371963085] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:14,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864388960] [2022-04-06 20:41:14,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:14,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:14,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:14,775 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:14,775 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 20:41:14,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:14,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:14,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:41:14,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2022-04-06 20:41:15,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 485 proven. 135 refuted. 0 times theorem prover too weak. 542 trivial. 0 not checked. [2022-04-06 20:41:15,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864388960] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:15,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:15,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 6, 7] total 40 [2022-04-06 20:41:15,450 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:15,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1407644252] [2022-04-06 20:41:15,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1407644252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:15,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:15,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:41:15,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764264865] [2022-04-06 20:41:15,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:15,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:41:15,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:15,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:41:15,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1435, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:41:15,451 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 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 20:41:16,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:16,711 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2022-04-06 20:41:16,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:41:16,711 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 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 20:41:16,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:16,712 INFO L225 Difference]: With dead ends: 110 [2022-04-06 20:41:16,712 INFO L226 Difference]: Without dead ends: 100 [2022-04-06 20:41:16,713 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 184 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=291, Invalid=4265, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:41:16,713 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 93 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 2350 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 2350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:16,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 124 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 2350 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:41:16,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-04-06 20:41:16,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-04-06 20:41:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 100 transitions. [2022-04-06 20:41:16,732 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 100 transitions. Word has length 95 [2022-04-06 20:41:16,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:16,732 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 100 transitions. [2022-04-06 20:41:16,732 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 30 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 20:41:16,732 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 100 transitions. [2022-04-06 20:41:16,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-04-06 20:41:16,733 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:16,733 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:16,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-04-06 20:41:16,933 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 20:41:16,933 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:16,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:16,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1339561654, now seen corresponding path program 55 times [2022-04-06 20:41:16,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:16,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1233788776] [2022-04-06 20:41:16,935 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:16,935 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:16,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1339561654, now seen corresponding path program 56 times [2022-04-06 20:41:16,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:16,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920134842] [2022-04-06 20:41:16,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:17,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:17,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 57 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:17,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:17,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920134842] [2022-04-06 20:41:17,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920134842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:17,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084114811] [2022-04-06 20:41:17,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:17,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:17,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:17,492 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:17,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 20:41:17,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:17,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:17,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:41:17,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:17,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 57 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:17,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:20,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:20,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084114811] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:20,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:20,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 34] total 66 [2022-04-06 20:41:20,452 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:20,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1233788776] [2022-04-06 20:41:20,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1233788776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:20,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:20,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:41:20,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725902036] [2022-04-06 20:41:20,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:20,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:41:20,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:20,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:41:20,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3198, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:41:20,454 INFO L87 Difference]: Start difference. First operand 99 states and 100 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:21,788 INFO L93 Difference]: Finished difference Result 113 states and 116 transitions. [2022-04-06 20:41:21,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:41:21,788 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 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 98 [2022-04-06 20:41:21,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:21,789 INFO L225 Difference]: With dead ends: 113 [2022-04-06 20:41:21,789 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 20:41:21,789 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 164 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2134, Invalid=6796, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:41:21,789 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 96 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 2480 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 2539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:21,789 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 94 Invalid, 2539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2480 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 20:41:21,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 20:41:21,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2022-04-06 20:41:21,813 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 20:41:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2022-04-06 20:41:21,813 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 98 [2022-04-06 20:41:21,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:21,814 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2022-04-06 20:41:21,814 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:21,814 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2022-04-06 20:41:21,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-04-06 20:41:21,814 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:21,814 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:21,832 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:22,019 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 20:41:22,019 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1065375902, now seen corresponding path program 57 times [2022-04-06 20:41:22,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:22,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970528207] [2022-04-06 20:41:22,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:22,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:22,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1065375902, now seen corresponding path program 58 times [2022-04-06 20:41:22,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:22,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041737689] [2022-04-06 20:41:22,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:22,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:22,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:22,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:22,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:22,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041737689] [2022-04-06 20:41:22,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041737689] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:22,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492419731] [2022-04-06 20:41:22,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:22,645 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:22,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:22,646 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:22,647 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 20:41:22,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:22,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:22,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:41:22,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:23,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 59 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492419731] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:24,913 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:24,913 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 33] total 65 [2022-04-06 20:41:24,913 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:24,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970528207] [2022-04-06 20:41:24,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970528207] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:24,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:24,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:41:24,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786066183] [2022-04-06 20:41:24,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:24,914 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:41:24,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:24,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:41:24,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1119, Invalid=3041, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:41:24,915 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 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 20:41:26,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:26,270 INFO L93 Difference]: Finished difference Result 116 states and 119 transitions. [2022-04-06 20:41:26,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:41:26,270 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 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 20:41:26,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:26,270 INFO L225 Difference]: With dead ends: 116 [2022-04-06 20:41:26,271 INFO L226 Difference]: Without dead ends: 106 [2022-04-06 20:41:26,272 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 172 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2227, Invalid=6703, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:41:26,272 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 99 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2616 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 2616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:26,272 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 64 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 2616 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:41:26,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-04-06 20:41:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2022-04-06 20:41:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2022-04-06 20:41:26,298 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2022-04-06 20:41:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:26,298 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2022-04-06 20:41:26,298 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.9393939393939394) internal successors, (97), 32 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 20:41:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2022-04-06 20:41:26,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-04-06 20:41:26,299 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:26,299 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:26,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 20:41:26,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:41:26,500 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:26,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:26,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1825435062, now seen corresponding path program 59 times [2022-04-06 20:41:26,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:26,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [864607629] [2022-04-06 20:41:26,502 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:26,502 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:26,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1825435062, now seen corresponding path program 60 times [2022-04-06 20:41:26,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:26,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800574441] [2022-04-06 20:41:26,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:26,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:26,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:27,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 61 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:27,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800574441] [2022-04-06 20:41:27,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800574441] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:27,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845226848] [2022-04-06 20:41:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:27,182 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:27,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 20:41:27,257 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:27,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:27,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:41:27,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 148 proven. 2 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2022-04-06 20:41:27,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:27,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 599 proven. 150 refuted. 0 times theorem prover too weak. 677 trivial. 0 not checked. [2022-04-06 20:41:27,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845226848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:27,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:27,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 6, 7] total 43 [2022-04-06 20:41:27,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:27,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [864607629] [2022-04-06 20:41:27,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [864607629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:27,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:27,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:41:27,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015730449] [2022-04-06 20:41:27,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:27,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:41:27,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:41:27,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:41:27,940 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:29,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:29,404 INFO L93 Difference]: Finished difference Result 119 states and 122 transitions. [2022-04-06 20:41:29,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:41:29,404 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 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 104 [2022-04-06 20:41:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:29,405 INFO L225 Difference]: With dead ends: 119 [2022-04-06 20:41:29,405 INFO L226 Difference]: Without dead ends: 109 [2022-04-06 20:41:29,405 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 202 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=318, Invalid=5084, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:41:29,406 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2758 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 2758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:29,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 34 Invalid, 2821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 2758 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:41:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-04-06 20:41:29,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2022-04-06 20:41:29,429 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 20:41:29,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2022-04-06 20:41:29,429 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 104 [2022-04-06 20:41:29,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:29,430 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2022-04-06 20:41:29,430 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.9411764705882355) internal successors, (100), 33 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:29,430 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2022-04-06 20:41:29,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 20:41:29,434 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:29,434 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:29,440 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:29,635 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 20:41:29,635 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:29,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:29,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1680286110, now seen corresponding path program 61 times [2022-04-06 20:41:29,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:29,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [728518082] [2022-04-06 20:41:29,637 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:29,637 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:29,637 INFO L85 PathProgramCache]: Analyzing trace with hash -1680286110, now seen corresponding path program 62 times [2022-04-06 20:41:29,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:29,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875803615] [2022-04-06 20:41:29,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:29,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:29,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:30,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:30,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:30,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:30,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875803615] [2022-04-06 20:41:30,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875803615] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:30,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556230379] [2022-04-06 20:41:30,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:30,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:30,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:30,253 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:30,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 20:41:30,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:30,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:30,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 20:41:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:30,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:30,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:32,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 63 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:32,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556230379] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:32,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:32,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 35] total 69 [2022-04-06 20:41:32,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:32,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [728518082] [2022-04-06 20:41:32,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [728518082] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:32,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:32,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:41:32,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171027492] [2022-04-06 20:41:32,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:32,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:41:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:32,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:41:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1257, Invalid=3435, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:41:32,714 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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 20:41:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:34,181 INFO L93 Difference]: Finished difference Result 122 states and 125 transitions. [2022-04-06 20:41:34,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:41:34,181 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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 20:41:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:34,182 INFO L225 Difference]: With dead ends: 122 [2022-04-06 20:41:34,182 INFO L226 Difference]: Without dead ends: 112 [2022-04-06 20:41:34,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 182 SyntacticMatches, 2 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:41:34,183 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 105 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2936 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 2936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:34,183 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 29 Invalid, 3001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 2936 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 20:41:34,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-04-06 20:41:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2022-04-06 20:41:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 112 transitions. [2022-04-06 20:41:34,219 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 112 transitions. Word has length 107 [2022-04-06 20:41:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:34,220 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 112 transitions. [2022-04-06 20:41:34,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 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 20:41:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 112 transitions. [2022-04-06 20:41:34,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 20:41:34,221 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:34,221 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:34,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:34,443 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 20:41:34,444 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:34,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:34,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1715043146, now seen corresponding path program 63 times [2022-04-06 20:41:34,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:34,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564883735] [2022-04-06 20:41:34,445 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:34,445 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:34,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1715043146, now seen corresponding path program 64 times [2022-04-06 20:41:34,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:34,446 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755155927] [2022-04-06 20:41:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:34,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:34,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:35,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 65 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755155927] [2022-04-06 20:41:35,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755155927] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:35,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241378884] [2022-04-06 20:41:35,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:35,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:35,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:35,134 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:35,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 20:41:35,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:35,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:41:35,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 65 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:36,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1617 backedges. 0 proven. 1617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:41,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241378884] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:41,634 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:41,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 38] total 105 [2022-04-06 20:41:41,634 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:41,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564883735] [2022-04-06 20:41:41,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564883735] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:41,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:41,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:41:41,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223850347] [2022-04-06 20:41:41,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:41,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:41:41,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:41,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:41:41,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2617, Invalid=8303, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:41:41,636 INFO L87 Difference]: Start difference. First operand 111 states and 112 transitions. Second operand has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:43,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:43,260 INFO L93 Difference]: Finished difference Result 125 states and 128 transitions. [2022-04-06 20:41:43,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:41:43,261 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 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 110 [2022-04-06 20:41:43,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:43,261 INFO L225 Difference]: With dead ends: 125 [2022-04-06 20:41:43,261 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 20:41:43,263 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4555 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3935, Invalid=14971, Unknown=0, NotChecked=0, Total=18906 [2022-04-06 20:41:43,263 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 3114 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 3181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 3114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:43,264 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 19 Invalid, 3181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 3114 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 20:41:43,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 20:41:43,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2022-04-06 20:41:43,288 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 20:41:43,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2022-04-06 20:41:43,289 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 110 [2022-04-06 20:41:43,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:43,289 INFO L478 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2022-04-06 20:41:43,289 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9444444444444446) internal successors, (106), 35 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:43,289 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2022-04-06 20:41:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 20:41:43,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:43,290 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:43,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-04-06 20:41:43,511 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 20:41:43,511 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:43,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:43,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1194120546, now seen corresponding path program 65 times [2022-04-06 20:41:43,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:43,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1831652975] [2022-04-06 20:41:43,513 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:43,513 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:43,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1194120546, now seen corresponding path program 66 times [2022-04-06 20:41:43,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:43,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293575189] [2022-04-06 20:41:43,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:43,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:43,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:44,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 67 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:44,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:44,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293575189] [2022-04-06 20:41:44,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293575189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:44,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862921365] [2022-04-06 20:41:44,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:41:44,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:44,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:44,146 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:44,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 20:41:44,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:41:44,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:44,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:41:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 163 proven. 2 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2022-04-06 20:41:44,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:45,498 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 1552 trivial. 0 not checked. [2022-04-06 20:41:45,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862921365] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:45,498 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:45,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 7, 8] total 48 [2022-04-06 20:41:45,498 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:45,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1831652975] [2022-04-06 20:41:45,499 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1831652975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:45,499 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:45,499 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:41:45,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768923883] [2022-04-06 20:41:45,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:45,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:41:45,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:45,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:41:45,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:41:45,500 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 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 20:41:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:47,271 INFO L93 Difference]: Finished difference Result 128 states and 131 transitions. [2022-04-06 20:41:47,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:41:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 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 20:41:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:47,272 INFO L225 Difference]: With dead ends: 128 [2022-04-06 20:41:47,272 INFO L226 Difference]: Without dead ends: 118 [2022-04-06 20:41:47,273 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=565, Invalid=6077, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:41:47,274 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3394 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 3463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:47,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 89 Invalid, 3463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3394 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 20:41:47,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-04-06 20:41:47,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2022-04-06 20:41:47,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:47,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2022-04-06 20:41:47,303 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2022-04-06 20:41:47,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:47,304 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2022-04-06 20:41:47,304 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.945945945945946) internal successors, (109), 36 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 20:41:47,304 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2022-04-06 20:41:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 20:41:47,304 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:47,304 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:47,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-04-06 20:41:47,507 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 20:41:47,507 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:47,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:47,508 INFO L85 PathProgramCache]: Analyzing trace with hash 105784394, now seen corresponding path program 67 times [2022-04-06 20:41:47,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:47,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731841573] [2022-04-06 20:41:47,509 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:47,510 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:47,510 INFO L85 PathProgramCache]: Analyzing trace with hash 105784394, now seen corresponding path program 68 times [2022-04-06 20:41:47,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:47,510 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056140077] [2022-04-06 20:41:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:47,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:48,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:48,220 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:48,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056140077] [2022-04-06 20:41:48,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056140077] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:48,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286544350] [2022-04-06 20:41:48,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:41:48,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:48,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:48,223 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:48,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 20:41:48,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:41:48,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:48,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:41:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:49,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:49,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 69 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:52,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286544350] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:52,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:52,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 110 [2022-04-06 20:41:52,632 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:52,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731841573] [2022-04-06 20:41:52,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731841573] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:52,632 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:52,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:41:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116938228] [2022-04-06 20:41:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:52,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:41:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:41:52,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2879, Invalid=9111, Unknown=0, NotChecked=0, Total=11990 [2022-04-06 20:41:52,634 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:54,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:41:54,599 INFO L93 Difference]: Finished difference Result 131 states and 134 transitions. [2022-04-06 20:41:54,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:41:54,600 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 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 116 [2022-04-06 20:41:54,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:41:54,600 INFO L225 Difference]: With dead ends: 131 [2022-04-06 20:41:54,600 INFO L226 Difference]: Without dead ends: 121 [2022-04-06 20:41:54,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5077 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4347, Invalid=16533, Unknown=0, NotChecked=0, Total=20880 [2022-04-06 20:41:54,603 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 114 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 3727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:41:54,603 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 139 Invalid, 3727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:41:54,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-04-06 20:41:54,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2022-04-06 20:41:54,634 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 20:41:54,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2022-04-06 20:41:54,634 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 116 [2022-04-06 20:41:54,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:41:54,635 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2022-04-06 20:41:54,635 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:41:54,635 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2022-04-06 20:41:54,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-04-06 20:41:54,636 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:41:54,636 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:41:54,659 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 20:41:54,858 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 20:41:54,859 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:41:54,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:41:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash 191597666, now seen corresponding path program 69 times [2022-04-06 20:41:54,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:54,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1952074250] [2022-04-06 20:41:54,861 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:41:54,861 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:41:54,861 INFO L85 PathProgramCache]: Analyzing trace with hash 191597666, now seen corresponding path program 70 times [2022-04-06 20:41:54,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:41:54,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917400726] [2022-04-06 20:41:54,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:41:54,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:41:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:55,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:41:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:41:55,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 71 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:55,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:41:55,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917400726] [2022-04-06 20:41:55,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917400726] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:41:55,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901353478] [2022-04-06 20:41:55,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:41:55,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:41:55,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:41:55,632 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:41:55,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 20:41:55,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:41:55,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:41:55,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:41:55,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:41:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 71 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:56,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:41:59,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 0 proven. 1926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:41:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901353478] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:41:59,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:41:59,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 41] total 80 [2022-04-06 20:41:59,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:41:59,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1952074250] [2022-04-06 20:41:59,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1952074250] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:41:59,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:41:59,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:41:59,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845436872] [2022-04-06 20:41:59,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:41:59,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:41:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:41:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:41:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4717, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:41:59,641 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 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 20:42:01,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:01,588 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-04-06 20:42:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:42:01,588 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 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 20:42:01,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:01,589 INFO L225 Difference]: With dead ends: 134 [2022-04-06 20:42:01,589 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 20:42:01,590 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3149, Invalid=10191, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:42:01,591 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 3828 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 3901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 3828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:01,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 109 Invalid, 3901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 3828 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 20:42:01,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 20:42:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2022-04-06 20:42:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2022-04-06 20:42:01,618 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 119 [2022-04-06 20:42:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:01,618 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2022-04-06 20:42:01,618 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.948717948717949) internal successors, (115), 38 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 20:42:01,618 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2022-04-06 20:42:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 20:42:01,619 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:01,619 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:01,639 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 20:42:01,825 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 20:42:01,826 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:01,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash 1149242698, now seen corresponding path program 71 times [2022-04-06 20:42:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:01,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1852392299] [2022-04-06 20:42:01,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:01,828 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:01,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1149242698, now seen corresponding path program 72 times [2022-04-06 20:42:01,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:01,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748754835] [2022-04-06 20:42:01,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:01,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:01,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:02,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:02,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 73 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:02,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:02,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748754835] [2022-04-06 20:42:02,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748754835] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:02,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248454549] [2022-04-06 20:42:02,585 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:02,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:02,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:02,591 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:02,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 20:42:02,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:42:02,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:02,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:42:02,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:03,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 178 proven. 2 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2022-04-06 20:42:03,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:03,960 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 0 proven. 180 refuted. 0 times theorem prover too weak. 1855 trivial. 0 not checked. [2022-04-06 20:42:03,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248454549] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:03,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:03,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 7, 8] total 51 [2022-04-06 20:42:03,960 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:03,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1852392299] [2022-04-06 20:42:03,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1852392299] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:03,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:03,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:42:03,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053864146] [2022-04-06 20:42:03,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:03,961 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:42:03,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:03,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:42:03,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:42:03,962 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:06,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:06,007 INFO L93 Difference]: Finished difference Result 137 states and 140 transitions. [2022-04-06 20:42:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:42:06,008 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 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 122 [2022-04-06 20:42:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:06,008 INFO L225 Difference]: With dead ends: 137 [2022-04-06 20:42:06,008 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 20:42:06,009 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 863 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=610, Invalid=7046, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:42:06,010 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 120 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 4036 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 4111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 4036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:06,010 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 104 Invalid, 4111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 4036 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:42:06,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 20:42:06,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2022-04-06 20:42:06,039 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 20:42:06,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2022-04-06 20:42:06,039 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 122 [2022-04-06 20:42:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:06,039 INFO L478 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2022-04-06 20:42:06,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.95) internal successors, (118), 39 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:06,040 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2022-04-06 20:42:06,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-04-06 20:42:06,040 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:06,040 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:06,056 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 20:42:06,240 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 20:42:06,241 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:06,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:06,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1115356318, now seen corresponding path program 73 times [2022-04-06 20:42:06,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:06,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1764894736] [2022-04-06 20:42:06,243 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:06,243 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:06,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1115356318, now seen corresponding path program 74 times [2022-04-06 20:42:06,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:06,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053984845] [2022-04-06 20:42:06,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:06,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:06,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:06,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 75 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:06,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053984845] [2022-04-06 20:42:06,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053984845] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:06,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433003423] [2022-04-06 20:42:06,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:06,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:06,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:07,003 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:07,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 20:42:07,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:07,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:07,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:42:07,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 75 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:08,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:12,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2147 backedges. 75 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:12,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433003423] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:12,064 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:12,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 119 [2022-04-06 20:42:12,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:12,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1764894736] [2022-04-06 20:42:12,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1764894736] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:12,065 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:12,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:42:12,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22435134] [2022-04-06 20:42:12,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:12,065 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:42:12,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:12,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:42:12,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3353, Invalid=10689, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:42:12,068 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 20:42:14,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:14,143 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2022-04-06 20:42:14,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:42:14,143 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 20:42:14,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:14,144 INFO L225 Difference]: With dead ends: 140 [2022-04-06 20:42:14,144 INFO L226 Difference]: Without dead ends: 130 [2022-04-06 20:42:14,145 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5968 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=5061, Invalid=19431, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:42:14,147 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4172 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 4172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:14,147 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 34 Invalid, 4249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 4172 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 20:42:14,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-04-06 20:42:14,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2022-04-06 20:42:14,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2022-04-06 20:42:14,186 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2022-04-06 20:42:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:14,186 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2022-04-06 20:42:14,186 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 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 20:42:14,186 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2022-04-06 20:42:14,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 20:42:14,187 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:14,187 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:14,203 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-04-06 20:42:14,387 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 20:42:14,387 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:14,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:14,388 INFO L85 PathProgramCache]: Analyzing trace with hash -438356406, now seen corresponding path program 75 times [2022-04-06 20:42:14,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:14,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1913662907] [2022-04-06 20:42:14,390 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:14,390 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:14,390 INFO L85 PathProgramCache]: Analyzing trace with hash -438356406, now seen corresponding path program 76 times [2022-04-06 20:42:14,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:14,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398999036] [2022-04-06 20:42:14,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:14,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:14,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:15,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:15,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398999036] [2022-04-06 20:42:15,195 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398999036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:15,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814755206] [2022-04-06 20:42:15,195 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:15,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:15,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:15,196 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:15,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-04-06 20:42:15,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:15,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:15,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:42:15,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 77 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:15,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:19,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2262 backedges. 0 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:19,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814755206] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:19,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:19,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 44] total 86 [2022-04-06 20:42:19,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:19,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1913662907] [2022-04-06 20:42:19,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1913662907] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:19,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:19,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:42:19,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049019728] [2022-04-06 20:42:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:19,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:42:19,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:19,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:42:19,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5458, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:42:19,805 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:21,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:21,994 INFO L93 Difference]: Finished difference Result 143 states and 146 transitions. [2022-04-06 20:42:21,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:42:21,994 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 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 128 [2022-04-06 20:42:21,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:21,995 INFO L225 Difference]: With dead ends: 143 [2022-04-06 20:42:21,995 INFO L226 Difference]: Without dead ends: 133 [2022-04-06 20:42:21,996 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 214 SyntacticMatches, 2 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3644, Invalid=11856, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:42:21,996 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 4410 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 4489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 4410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:21,996 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 44 Invalid, 4489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 4410 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 20:42:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-04-06 20:42:22,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2022-04-06 20:42:22,027 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 20:42:22,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2022-04-06 20:42:22,027 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 128 [2022-04-06 20:42:22,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:22,027 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2022-04-06 20:42:22,028 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9523809523809526) internal successors, (124), 41 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:22,028 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2022-04-06 20:42:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-04-06 20:42:22,028 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:22,028 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:22,044 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-04-06 20:42:22,228 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 20:42:22,229 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:22,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1100400030, now seen corresponding path program 77 times [2022-04-06 20:42:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:22,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1842779468] [2022-04-06 20:42:22,231 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:22,231 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:22,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1100400030, now seen corresponding path program 78 times [2022-04-06 20:42:22,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:22,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274119118] [2022-04-06 20:42:22,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:22,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:23,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:23,068 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 79 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:23,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274119118] [2022-04-06 20:42:23,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274119118] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:23,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303627440] [2022-04-06 20:42:23,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:23,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:23,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:23,071 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:23,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-04-06 20:42:23,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:42:23,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:23,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:42:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:23,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 193 proven. 2 refuted. 0 times theorem prover too weak. 2185 trivial. 0 not checked. [2022-04-06 20:42:23,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 1013 proven. 195 refuted. 0 times theorem prover too weak. 1172 trivial. 0 not checked. [2022-04-06 20:42:23,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303627440] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:23,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:23,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 6, 7] total 52 [2022-04-06 20:42:23,982 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1842779468] [2022-04-06 20:42:23,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1842779468] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:23,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:23,983 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:42:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229889483] [2022-04-06 20:42:23,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:23,983 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:42:23,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:42:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2491, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:42:23,984 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 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 20:42:26,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:26,372 INFO L93 Difference]: Finished difference Result 146 states and 149 transitions. [2022-04-06 20:42:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:42:26,373 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 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 20:42:26,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:26,373 INFO L225 Difference]: With dead ends: 146 [2022-04-06 20:42:26,373 INFO L226 Difference]: Without dead ends: 136 [2022-04-06 20:42:26,374 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=399, Invalid=7973, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:42:26,374 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 129 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4750 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 4831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 4750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:26,374 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 134 Invalid, 4831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 4750 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 20:42:26,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-04-06 20:42:26,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2022-04-06 20:42:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:26,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 136 transitions. [2022-04-06 20:42:26,404 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 136 transitions. Word has length 131 [2022-04-06 20:42:26,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:26,404 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 136 transitions. [2022-04-06 20:42:26,404 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.953488372093023) internal successors, (127), 42 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 20:42:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 136 transitions. [2022-04-06 20:42:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 20:42:26,405 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:26,405 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:26,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-04-06 20:42:26,605 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 20:42:26,605 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1552179382, now seen corresponding path program 79 times [2022-04-06 20:42:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:26,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [326728987] [2022-04-06 20:42:26,607 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:26,608 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:26,608 INFO L85 PathProgramCache]: Analyzing trace with hash -1552179382, now seen corresponding path program 80 times [2022-04-06 20:42:26,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:26,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476422335] [2022-04-06 20:42:26,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:26,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:26,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:27,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:27,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 81 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:27,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:27,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476422335] [2022-04-06 20:42:27,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476422335] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:27,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922527429] [2022-04-06 20:42:27,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:27,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:27,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:27,514 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:27,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-04-06 20:42:27,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:27,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:27,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:42:27,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 81 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:29,585 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 81 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:33,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922527429] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:33,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:33,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 128 [2022-04-06 20:42:33,134 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:33,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [326728987] [2022-04-06 20:42:33,134 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [326728987] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:33,134 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:33,134 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:42:33,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491815929] [2022-04-06 20:42:33,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:33,134 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:42:33,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:33,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:42:33,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3863, Invalid=12393, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:42:33,136 INFO L87 Difference]: Start difference. First operand 135 states and 136 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:35,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:35,573 INFO L93 Difference]: Finished difference Result 149 states and 152 transitions. [2022-04-06 20:42:35,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:42:35,574 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 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 134 [2022-04-06 20:42:35,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:35,575 INFO L225 Difference]: With dead ends: 149 [2022-04-06 20:42:35,575 INFO L226 Difference]: Without dead ends: 139 [2022-04-06 20:42:35,577 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6931 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=5829, Invalid=22563, Unknown=0, NotChecked=0, Total=28392 [2022-04-06 20:42:35,577 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4964 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 5047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 4964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:35,577 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 114 Invalid, 5047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 4964 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 20:42:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-04-06 20:42:35,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2022-04-06 20:42:35,610 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 20:42:35,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2022-04-06 20:42:35,610 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 134 [2022-04-06 20:42:35,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:35,611 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2022-04-06 20:42:35,611 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:35,611 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2022-04-06 20:42:35,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-04-06 20:42:35,612 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:35,612 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:35,643 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 20:42:35,828 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 20:42:35,829 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:35,829 INFO L85 PathProgramCache]: Analyzing trace with hash -83349150, now seen corresponding path program 81 times [2022-04-06 20:42:35,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:35,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1591793500] [2022-04-06 20:42:35,831 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:35,831 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:35,831 INFO L85 PathProgramCache]: Analyzing trace with hash -83349150, now seen corresponding path program 82 times [2022-04-06 20:42:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457530612] [2022-04-06 20:42:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:36,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:36,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:36,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457530612] [2022-04-06 20:42:36,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457530612] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:36,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216412083] [2022-04-06 20:42:36,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:36,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:36,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:36,748 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:36,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-04-06 20:42:36,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:36,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:36,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:42:36,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:38,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 83 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:42,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216412083] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:42,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:42,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 131 [2022-04-06 20:42:42,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:42,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1591793500] [2022-04-06 20:42:42,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1591793500] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:42,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:42,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:42:42,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528810403] [2022-04-06 20:42:42,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:42,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:42:42,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:42,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:42:42,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4041, Invalid=12989, Unknown=0, NotChecked=0, Total=17030 [2022-04-06 20:42:42,581 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 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 20:42:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:45,202 INFO L93 Difference]: Finished difference Result 152 states and 155 transitions. [2022-04-06 20:42:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:42:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 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 20:42:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:45,203 INFO L225 Difference]: With dead ends: 152 [2022-04-06 20:42:45,203 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 20:42:45,205 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7268 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6097, Invalid=23659, Unknown=0, NotChecked=0, Total=29756 [2022-04-06 20:42:45,205 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 135 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 5304 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 5389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 5304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:45,205 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 194 Invalid, 5389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 5304 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:42:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 20:42:45,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2022-04-06 20:42:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 142 transitions. [2022-04-06 20:42:45,246 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 142 transitions. Word has length 137 [2022-04-06 20:42:45,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:45,246 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 142 transitions. [2022-04-06 20:42:45,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.9555555555555557) internal successors, (133), 44 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 20:42:45,246 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 142 transitions. [2022-04-06 20:42:45,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 20:42:45,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:45,247 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:45,263 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 20:42:45,448 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 20:42:45,449 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash 711280714, now seen corresponding path program 83 times [2022-04-06 20:42:45,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:45,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2041431375] [2022-04-06 20:42:45,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:45,452 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:45,452 INFO L85 PathProgramCache]: Analyzing trace with hash 711280714, now seen corresponding path program 84 times [2022-04-06 20:42:45,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:45,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816562972] [2022-04-06 20:42:45,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:45,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:45,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:46,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:46,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 85 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:46,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816562972] [2022-04-06 20:42:46,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816562972] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:46,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644089245] [2022-04-06 20:42:46,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:42:46,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:46,380 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:46,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-04-06 20:42:46,442 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:42:46,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:46,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:42:46,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:46,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 208 proven. 2 refuted. 0 times theorem prover too weak. 2542 trivial. 0 not checked. [2022-04-06 20:42:46,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 1175 proven. 210 refuted. 0 times theorem prover too weak. 1367 trivial. 0 not checked. [2022-04-06 20:42:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644089245] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:47,434 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:47,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 6, 7] total 55 [2022-04-06 20:42:47,434 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:47,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2041431375] [2022-04-06 20:42:47,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2041431375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:47,434 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:47,434 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:42:47,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407722616] [2022-04-06 20:42:47,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:47,435 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:42:47,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:47,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:42:47,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=2800, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:42:47,436 INFO L87 Difference]: Start difference. First operand 141 states and 142 transitions. Second operand has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:50,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:50,169 INFO L93 Difference]: Finished difference Result 155 states and 158 transitions. [2022-04-06 20:42:50,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:42:50,171 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 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 140 [2022-04-06 20:42:50,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:50,172 INFO L225 Difference]: With dead ends: 155 [2022-04-06 20:42:50,172 INFO L226 Difference]: Without dead ends: 145 [2022-04-06 20:42:50,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 274 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=426, Invalid=9080, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:42:50,173 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 5446 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 5533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 5446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:50,173 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 104 Invalid, 5533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 5446 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-04-06 20:42:50,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-04-06 20:42:50,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2022-04-06 20:42:50,222 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 20:42:50,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2022-04-06 20:42:50,225 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 140 [2022-04-06 20:42:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:50,226 INFO L478 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2022-04-06 20:42:50,226 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9565217391304346) internal successors, (136), 45 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:50,226 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2022-04-06 20:42:50,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-04-06 20:42:50,226 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:50,227 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:50,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-04-06 20:42:50,430 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 20:42:50,431 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:50,431 INFO L85 PathProgramCache]: Analyzing trace with hash -330176414, now seen corresponding path program 85 times [2022-04-06 20:42:50,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:50,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [67974655] [2022-04-06 20:42:50,433 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:50,433 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:50,433 INFO L85 PathProgramCache]: Analyzing trace with hash -330176414, now seen corresponding path program 86 times [2022-04-06 20:42:50,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:50,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466410245] [2022-04-06 20:42:50,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:50,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:51,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 87 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:51,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:51,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466410245] [2022-04-06 20:42:51,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466410245] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:51,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790138362] [2022-04-06 20:42:51,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:42:51,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:51,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:51,458 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:51,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-04-06 20:42:51,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:42:51,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:51,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:42:51,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:42:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 87 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:52,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:42:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2882 backedges. 87 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:55,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790138362] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:42:55,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:42:55,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 47] total 93 [2022-04-06 20:42:55,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:42:55,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [67974655] [2022-04-06 20:42:55,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [67974655] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:42:55,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:42:55,642 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:42:55,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868556400] [2022-04-06 20:42:55,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:42:55,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:42:55,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:55,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:42:55,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2253, Invalid=6303, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:42:55,643 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 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 20:42:58,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:42:58,364 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-04-06 20:42:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:42:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 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 20:42:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:42:58,366 INFO L225 Difference]: With dead ends: 158 [2022-04-06 20:42:58,366 INFO L226 Difference]: Without dead ends: 148 [2022-04-06 20:42:58,367 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4495, Invalid=14137, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:42:58,367 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 141 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 5726 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 5815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 5726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:42:58,367 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 124 Invalid, 5815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 5726 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-04-06 20:42:58,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-04-06 20:42:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2022-04-06 20:42:58,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:42:58,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 148 transitions. [2022-04-06 20:42:58,402 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 148 transitions. Word has length 143 [2022-04-06 20:42:58,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:42:58,402 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 148 transitions. [2022-04-06 20:42:58,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 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 20:42:58,402 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 148 transitions. [2022-04-06 20:42:58,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-04-06 20:42:58,403 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:42:58,403 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:42:58,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-04-06 20:42:58,603 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 20:42:58,604 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:42:58,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:42:58,604 INFO L85 PathProgramCache]: Analyzing trace with hash 464269642, now seen corresponding path program 87 times [2022-04-06 20:42:58,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:42:58,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1071202430] [2022-04-06 20:42:58,606 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:42:58,606 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:42:58,606 INFO L85 PathProgramCache]: Analyzing trace with hash 464269642, now seen corresponding path program 88 times [2022-04-06 20:42:58,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:42:58,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236506469] [2022-04-06 20:42:58,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:42:58,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:42:58,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:59,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:42:59,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:42:59,607 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:42:59,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:42:59,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236506469] [2022-04-06 20:42:59,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236506469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:42:59,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412227256] [2022-04-06 20:42:59,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:42:59,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:42:59,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:42:59,609 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:42:59,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-04-06 20:42:59,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:42:59,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:42:59,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:42:59,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:00,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 89 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:03,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412227256] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:03,911 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:03,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 48] total 95 [2022-04-06 20:43:03,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:03,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1071202430] [2022-04-06 20:43:03,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1071202430] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:03,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:03,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:43:03,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855062190] [2022-04-06 20:43:03,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:03,912 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:43:03,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:03,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:43:03,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2349, Invalid=6581, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:43:03,914 INFO L87 Difference]: Start difference. First operand 147 states and 148 transitions. Second operand has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:06,792 INFO L93 Difference]: Finished difference Result 161 states and 164 transitions. [2022-04-06 20:43:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:43:06,792 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 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 146 [2022-04-06 20:43:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:06,793 INFO L225 Difference]: With dead ends: 161 [2022-04-06 20:43:06,793 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 20:43:06,794 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1130 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4687, Invalid=14773, Unknown=0, NotChecked=0, Total=19460 [2022-04-06 20:43:06,794 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 144 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 6018 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 6109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 6018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:06,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 149 Invalid, 6109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 6018 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-04-06 20:43:06,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 20:43:06,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2022-04-06 20:43:06,840 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 20:43:06,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2022-04-06 20:43:06,841 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 146 [2022-04-06 20:43:06,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:06,842 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2022-04-06 20:43:06,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9583333333333335) internal successors, (142), 47 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:06,842 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2022-04-06 20:43:06,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 20:43:06,843 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:06,843 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:06,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:07,059 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 20:43:07,059 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:07,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:07,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1758044318, now seen corresponding path program 89 times [2022-04-06 20:43:07,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:07,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1890089405] [2022-04-06 20:43:07,061 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:07,062 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:07,062 INFO L85 PathProgramCache]: Analyzing trace with hash -1758044318, now seen corresponding path program 90 times [2022-04-06 20:43:07,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:07,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852853933] [2022-04-06 20:43:07,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:07,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:07,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:08,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:08,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 91 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:08,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852853933] [2022-04-06 20:43:08,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852853933] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:08,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594357190] [2022-04-06 20:43:08,066 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:08,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:08,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:08,067 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:08,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-04-06 20:43:08,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:43:08,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:08,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:43:08,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 223 proven. 2 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2022-04-06 20:43:08,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:09,717 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2926 trivial. 0 not checked. [2022-04-06 20:43:09,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594357190] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:09,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:09,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 7, 8] total 60 [2022-04-06 20:43:09,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:09,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1890089405] [2022-04-06 20:43:09,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1890089405] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:09,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:09,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:43:09,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376448076] [2022-04-06 20:43:09,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:09,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:43:09,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:09,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:43:09,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3207, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:43:09,719 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 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 20:43:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:12,769 INFO L93 Difference]: Finished difference Result 164 states and 167 transitions. [2022-04-06 20:43:12,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:43:12,770 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 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 20:43:12,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:12,771 INFO L225 Difference]: With dead ends: 164 [2022-04-06 20:43:12,771 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 20:43:12,772 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 289 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1268 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=745, Invalid=10385, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:43:12,772 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 6340 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 6433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 6340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:12,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 194 Invalid, 6433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 6340 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-04-06 20:43:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 20:43:12,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2022-04-06 20:43:12,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:12,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 154 transitions. [2022-04-06 20:43:12,826 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 154 transitions. Word has length 149 [2022-04-06 20:43:12,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:12,827 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 154 transitions. [2022-04-06 20:43:12,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.9591836734693877) internal successors, (145), 48 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 20:43:12,827 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 154 transitions. [2022-04-06 20:43:12,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-04-06 20:43:12,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:12,828 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:12,837 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:13,031 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 20:43:13,032 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:13,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:13,032 INFO L85 PathProgramCache]: Analyzing trace with hash 207641162, now seen corresponding path program 91 times [2022-04-06 20:43:13,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:13,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1053790207] [2022-04-06 20:43:13,034 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:13,034 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:13,034 INFO L85 PathProgramCache]: Analyzing trace with hash 207641162, now seen corresponding path program 92 times [2022-04-06 20:43:13,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:13,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174168869] [2022-04-06 20:43:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:13,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:13,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:14,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:14,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:14,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174168869] [2022-04-06 20:43:14,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174168869] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:14,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821449397] [2022-04-06 20:43:14,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:14,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:14,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:14,151 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:14,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-04-06 20:43:14,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:14,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:14,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:43:14,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 93 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:16,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:23,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1821449397] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:23,339 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:23,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 52] total 147 [2022-04-06 20:43:23,339 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:23,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1053790207] [2022-04-06 20:43:23,340 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1053790207] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:23,340 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:23,340 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:43:23,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209223756] [2022-04-06 20:43:23,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:23,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:43:23,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:43:23,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5039, Invalid=16423, Unknown=0, NotChecked=0, Total=21462 [2022-04-06 20:43:23,341 INFO L87 Difference]: Start difference. First operand 153 states and 154 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:26,555 INFO L93 Difference]: Finished difference Result 167 states and 170 transitions. [2022-04-06 20:43:26,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:43:26,555 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 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 152 [2022-04-06 20:43:26,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:26,556 INFO L225 Difference]: With dead ends: 167 [2022-04-06 20:43:26,556 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 20:43:26,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 209 SyntacticMatches, 2 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9119 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=7575, Invalid=29867, Unknown=0, NotChecked=0, Total=37442 [2022-04-06 20:43:26,559 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 150 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 6674 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 6769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 6674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:26,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 244 Invalid, 6769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 6674 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:43:26,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 20:43:26,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2022-04-06 20:43:26,601 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 20:43:26,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2022-04-06 20:43:26,602 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 152 [2022-04-06 20:43:26,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:26,602 INFO L478 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2022-04-06 20:43:26,602 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:26,602 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2022-04-06 20:43:26,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-04-06 20:43:26,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:26,602 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:26,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-04-06 20:43:26,803 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 20:43:26,803 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:26,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:26,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1935305118, now seen corresponding path program 93 times [2022-04-06 20:43:26,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:26,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [530447932] [2022-04-06 20:43:26,805 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:26,805 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:26,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1935305118, now seen corresponding path program 94 times [2022-04-06 20:43:26,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:26,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094982273] [2022-04-06 20:43:26,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:26,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:27,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:27,881 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 95 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:27,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094982273] [2022-04-06 20:43:27,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094982273] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:27,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846770133] [2022-04-06 20:43:27,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:27,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:27,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:27,882 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:27,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-04-06 20:43:28,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:28,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:28,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:43:28,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:28,556 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 95 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:28,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3432 backedges. 95 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:32,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846770133] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:32,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:32,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 51] total 101 [2022-04-06 20:43:32,661 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:32,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [530447932] [2022-04-06 20:43:32,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [530447932] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:32,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:32,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:43:32,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388073870] [2022-04-06 20:43:32,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:32,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:43:32,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:32,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:43:32,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2649, Invalid=7451, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:43:32,663 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 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 20:43:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:35,929 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-04-06 20:43:35,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:43:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 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 20:43:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:35,930 INFO L225 Difference]: With dead ends: 170 [2022-04-06 20:43:35,930 INFO L226 Difference]: Without dead ends: 160 [2022-04-06 20:43:35,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 262 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=5287, Invalid=16765, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:43:35,931 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 153 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 6888 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 6985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 6888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:35,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 189 Invalid, 6985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 6888 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-04-06 20:43:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-04-06 20:43:35,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2022-04-06 20:43:35,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:35,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 160 transitions. [2022-04-06 20:43:35,983 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 160 transitions. Word has length 155 [2022-04-06 20:43:35,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:35,983 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 160 transitions. [2022-04-06 20:43:35,983 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9607843137254903) internal successors, (151), 50 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 20:43:35,983 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 160 transitions. [2022-04-06 20:43:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-04-06 20:43:35,984 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:35,984 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:36,000 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-04-06 20:43:36,184 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 20:43:36,184 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:36,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:36,185 INFO L85 PathProgramCache]: Analyzing trace with hash -2054044854, now seen corresponding path program 95 times [2022-04-06 20:43:36,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:36,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356291174] [2022-04-06 20:43:36,186 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:36,186 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:36,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2054044854, now seen corresponding path program 96 times [2022-04-06 20:43:36,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:36,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234596704] [2022-04-06 20:43:36,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:36,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:37,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:37,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:37,330 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 97 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:37,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234596704] [2022-04-06 20:43:37,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234596704] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:37,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602932647] [2022-04-06 20:43:37,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:43:37,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:37,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:37,331 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:37,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-04-06 20:43:37,395 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:43:37,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:37,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:43:37,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 238 proven. 2 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2022-04-06 20:43:37,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3577 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2022-04-06 20:43:39,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602932647] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:39,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:39,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 7, 8] total 63 [2022-04-06 20:43:39,067 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:39,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356291174] [2022-04-06 20:43:39,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356291174] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:39,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:39,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:43:39,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37277525] [2022-04-06 20:43:39,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:39,067 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:43:39,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:39,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:43:39,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=3555, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:43:39,068 INFO L87 Difference]: Start difference. First operand 159 states and 160 transitions. Second operand has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:42,474 INFO L93 Difference]: Finished difference Result 173 states and 176 transitions. [2022-04-06 20:43:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:43:42,474 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 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 158 [2022-04-06 20:43:42,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:42,475 INFO L225 Difference]: With dead ends: 173 [2022-04-06 20:43:42,475 INFO L226 Difference]: Without dead ends: 163 [2022-04-06 20:43:42,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 307 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1421 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=790, Invalid=11642, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:43:42,476 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 6970 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 7069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 6970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:42,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 19 Invalid, 7069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 6970 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 20:43:42,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-04-06 20:43:42,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2022-04-06 20:43:42,524 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 20:43:42,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2022-04-06 20:43:42,524 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 158 [2022-04-06 20:43:42,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:42,524 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2022-04-06 20:43:42,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9615384615384617) internal successors, (154), 51 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:42,524 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2022-04-06 20:43:42,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-04-06 20:43:42,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:42,525 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:42,531 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 20:43:42,730 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 20:43:42,730 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:42,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:42,731 INFO L85 PathProgramCache]: Analyzing trace with hash -376468126, now seen corresponding path program 97 times [2022-04-06 20:43:42,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:42,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583113378] [2022-04-06 20:43:42,734 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:42,734 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:42,734 INFO L85 PathProgramCache]: Analyzing trace with hash -376468126, now seen corresponding path program 98 times [2022-04-06 20:43:42,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:42,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516331164] [2022-04-06 20:43:42,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:42,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:43,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:43,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 99 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:43,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516331164] [2022-04-06 20:43:43,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516331164] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:43,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357963893] [2022-04-06 20:43:43,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:43:43,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:43,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:43,891 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:43,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-04-06 20:43:44,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:43:44,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:44,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 104 conjunts are in the unsatisfiable core [2022-04-06 20:43:44,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:46,769 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 99 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:46,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:43:51,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3725 backedges. 99 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:51,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357963893] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:43:51,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:43:51,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 155 [2022-04-06 20:43:51,820 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:43:51,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583113378] [2022-04-06 20:43:51,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583113378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:43:51,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:43:51,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:43:51,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755111697] [2022-04-06 20:43:51,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:43:51,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:43:51,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:51,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:43:51,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5609, Invalid=18261, Unknown=0, NotChecked=0, Total=23870 [2022-04-06 20:43:51,823 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 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 20:43:55,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:43:55,375 INFO L93 Difference]: Finished difference Result 176 states and 179 transitions. [2022-04-06 20:43:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:43:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 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 20:43:55,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:43:55,376 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:43:55,376 INFO L226 Difference]: Without dead ends: 166 [2022-04-06 20:43:55,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10252 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=8457, Invalid=33363, Unknown=0, NotChecked=0, Total=41820 [2022-04-06 20:43:55,378 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7466 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 7567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 7466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:43:55,378 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 189 Invalid, 7567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 7466 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-04-06 20:43:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-04-06 20:43:55,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2022-04-06 20:43:55,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:43:55,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 166 transitions. [2022-04-06 20:43:55,418 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 166 transitions. Word has length 161 [2022-04-06 20:43:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:43:55,418 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 166 transitions. [2022-04-06 20:43:55,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 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 20:43:55,419 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 166 transitions. [2022-04-06 20:43:55,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-04-06 20:43:55,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:43:55,419 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:43:55,436 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-04-06 20:43:55,620 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 20:43:55,620 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:43:55,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:43:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash 72379466, now seen corresponding path program 99 times [2022-04-06 20:43:55,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:43:55,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [386615738] [2022-04-06 20:43:55,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:43:55,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:43:55,622 INFO L85 PathProgramCache]: Analyzing trace with hash 72379466, now seen corresponding path program 100 times [2022-04-06 20:43:55,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:43:55,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023618198] [2022-04-06 20:43:55,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:43:55,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:43:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:56,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:43:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:43:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:56,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:43:56,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023618198] [2022-04-06 20:43:56,823 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023618198] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:43:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804531022] [2022-04-06 20:43:56,824 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:43:56,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:43:56,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:43:56,825 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:43:56,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-04-06 20:43:56,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:43:56,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:43:56,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:43:56,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:43:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:43:57,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3876 backedges. 101 proven. 3775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:01,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804531022] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:01,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:01,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 53, 53] total 106 [2022-04-06 20:44:01,213 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:01,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [386615738] [2022-04-06 20:44:01,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [386615738] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:01,214 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:01,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-04-06 20:44:01,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923970382] [2022-04-06 20:44:01,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:01,214 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-04-06 20:44:01,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:01,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-04-06 20:44:01,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2912, Invalid=8218, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:44:01,216 INFO L87 Difference]: Start difference. First operand 165 states and 166 transitions. Second operand has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:04,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:04,841 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2022-04-06 20:44:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-04-06 20:44:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 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 164 [2022-04-06 20:44:04,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:04,842 INFO L225 Difference]: With dead ends: 179 [2022-04-06 20:44:04,842 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 20:44:04,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 278 SyntacticMatches, 2 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5817, Invalid=18675, Unknown=0, NotChecked=0, Total=24492 [2022-04-06 20:44:04,844 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 7710 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 7813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 7710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:04,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 144 Invalid, 7813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 7710 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 20:44:04,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 20:44:04,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2022-04-06 20:44:04,884 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 20:44:04,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2022-04-06 20:44:04,885 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 164 [2022-04-06 20:44:04,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:04,885 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2022-04-06 20:44:04,885 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.962962962962963) internal successors, (160), 53 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:04,885 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2022-04-06 20:44:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-04-06 20:44:04,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:04,886 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:04,902 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-04-06 20:44:05,086 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 20:44:05,086 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:05,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1457800290, now seen corresponding path program 101 times [2022-04-06 20:44:05,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:05,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1307529041] [2022-04-06 20:44:05,088 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:05,088 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1457800290, now seen corresponding path program 102 times [2022-04-06 20:44:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:05,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000789827] [2022-04-06 20:44:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:05,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:06,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:06,376 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 103 proven. 3927 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:06,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:06,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000789827] [2022-04-06 20:44:06,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000789827] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:06,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265127253] [2022-04-06 20:44:06,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:06,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:06,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:06,379 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:06,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-04-06 20:44:06,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:44:06,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:06,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:44:06,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 253 proven. 2 refuted. 0 times theorem prover too weak. 3775 trivial. 0 not checked. [2022-04-06 20:44:06,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:07,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4030 backedges. 1733 proven. 255 refuted. 0 times theorem prover too weak. 2042 trivial. 0 not checked. [2022-04-06 20:44:07,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265127253] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:07,547 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:07,547 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 6, 7] total 64 [2022-04-06 20:44:07,547 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:07,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1307529041] [2022-04-06 20:44:07,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1307529041] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:07,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:07,548 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:44:07,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884717802] [2022-04-06 20:44:07,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:07,548 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:44:07,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:07,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:44:07,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=3835, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:44:07,549 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 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 20:44:11,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:11,449 INFO L93 Difference]: Finished difference Result 182 states and 185 transitions. [2022-04-06 20:44:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:44:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 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 20:44:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:11,450 INFO L225 Difference]: With dead ends: 182 [2022-04-06 20:44:11,450 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 20:44:11,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 328 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=507, Invalid=12833, Unknown=0, NotChecked=0, Total=13340 [2022-04-06 20:44:11,451 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 8038 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 8143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 8038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:11,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 164 Invalid, 8143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 8038 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-04-06 20:44:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 20:44:11,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2022-04-06 20:44:11,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 172 transitions. [2022-04-06 20:44:11,496 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 172 transitions. Word has length 167 [2022-04-06 20:44:11,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:11,496 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 172 transitions. [2022-04-06 20:44:11,496 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.963636363636364) internal successors, (163), 54 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 20:44:11,496 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 172 transitions. [2022-04-06 20:44:11,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-06 20:44:11,497 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:11,497 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:11,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-04-06 20:44:11,697 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 20:44:11,697 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:11,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash -106146486, now seen corresponding path program 103 times [2022-04-06 20:44:11,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1356730594] [2022-04-06 20:44:11,699 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:11,699 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:11,699 INFO L85 PathProgramCache]: Analyzing trace with hash -106146486, now seen corresponding path program 104 times [2022-04-06 20:44:11,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:11,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345027260] [2022-04-06 20:44:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:11,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:11,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:12,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 105 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:12,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345027260] [2022-04-06 20:44:12,996 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345027260] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:12,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099955364] [2022-04-06 20:44:12,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:12,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:12,997 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:12,998 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:12,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-04-06 20:44:13,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:13,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:13,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 110 conjunts are in the unsatisfiable core [2022-04-06 20:44:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 105 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:16,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4187 backedges. 105 proven. 4082 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:21,709 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099955364] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:21,709 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:21,709 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 164 [2022-04-06 20:44:21,709 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1356730594] [2022-04-06 20:44:21,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1356730594] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:21,710 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:21,710 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:44:21,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937706821] [2022-04-06 20:44:21,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:21,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:44:21,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:44:21,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6263, Invalid=20469, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:44:21,711 INFO L87 Difference]: Start difference. First operand 171 states and 172 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:25,658 INFO L93 Difference]: Finished difference Result 185 states and 188 transitions. [2022-04-06 20:44:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:44:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 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 170 [2022-04-06 20:44:25,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:25,659 INFO L225 Difference]: With dead ends: 185 [2022-04-06 20:44:25,659 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 20:44:25,661 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 451 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11503 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=9441, Invalid=37431, Unknown=0, NotChecked=0, Total=46872 [2022-04-06 20:44:25,662 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 8378 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 8485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 8378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:25,662 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 189 Invalid, 8485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 8378 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:44:25,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 20:44:25,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 174. [2022-04-06 20:44:25,706 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 20:44:25,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2022-04-06 20:44:25,706 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 170 [2022-04-06 20:44:25,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:25,706 INFO L478 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2022-04-06 20:44:25,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2022-04-06 20:44:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-04-06 20:44:25,707 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:25,707 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:25,723 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-04-06 20:44:25,907 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 20:44:25,908 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:25,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:25,908 INFO L85 PathProgramCache]: Analyzing trace with hash 160676706, now seen corresponding path program 105 times [2022-04-06 20:44:25,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:25,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1254966857] [2022-04-06 20:44:25,910 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:25,910 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:25,910 INFO L85 PathProgramCache]: Analyzing trace with hash 160676706, now seen corresponding path program 106 times [2022-04-06 20:44:25,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:25,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685316920] [2022-04-06 20:44:25,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:25,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:25,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:27,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 107 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:27,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685316920] [2022-04-06 20:44:27,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685316920] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:27,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410493577] [2022-04-06 20:44:27,253 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:44:27,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:27,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:27,255 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:27,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-04-06 20:44:27,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:44:27,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:27,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 109 conjunts are in the unsatisfiable core [2022-04-06 20:44:27,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 107 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:28,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:32,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4347 backedges. 107 proven. 4240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:32,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410493577] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:32,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:32,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 112 [2022-04-06 20:44:32,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:32,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1254966857] [2022-04-06 20:44:32,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1254966857] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:32,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:32,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-04-06 20:44:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838607162] [2022-04-06 20:44:32,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:32,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-04-06 20:44:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:32,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-04-06 20:44:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3245, Invalid=9187, Unknown=0, NotChecked=0, Total=12432 [2022-04-06 20:44:32,299 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 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 20:44:36,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:36,340 INFO L93 Difference]: Finished difference Result 188 states and 191 transitions. [2022-04-06 20:44:36,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-04-06 20:44:36,341 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 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 20:44:36,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:36,341 INFO L225 Difference]: With dead ends: 188 [2022-04-06 20:44:36,341 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 20:44:36,343 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 293 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=6483, Invalid=20907, Unknown=0, NotChecked=0, Total=27390 [2022-04-06 20:44:36,343 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 171 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 8532 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 8641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 8532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:36,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 54 Invalid, 8641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 8532 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-04-06 20:44:36,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 20:44:36,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2022-04-06 20:44:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 178 transitions. [2022-04-06 20:44:36,406 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 178 transitions. Word has length 173 [2022-04-06 20:44:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:36,406 INFO L478 AbstractCegarLoop]: Abstraction has 177 states and 178 transitions. [2022-04-06 20:44:36,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.9649122807017543) internal successors, (169), 56 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 20:44:36,407 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 178 transitions. [2022-04-06 20:44:36,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-04-06 20:44:36,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:36,407 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:36,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-04-06 20:44:36,630 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 20:44:36,631 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:36,631 INFO L85 PathProgramCache]: Analyzing trace with hash -894075318, now seen corresponding path program 107 times [2022-04-06 20:44:36,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:36,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [120442747] [2022-04-06 20:44:36,632 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:36,632 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:36,632 INFO L85 PathProgramCache]: Analyzing trace with hash -894075318, now seen corresponding path program 108 times [2022-04-06 20:44:36,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:36,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196568851] [2022-04-06 20:44:36,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:36,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:38,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:38,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:38,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 109 proven. 4401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:38,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196568851] [2022-04-06 20:44:38,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196568851] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:38,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128827635] [2022-04-06 20:44:38,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:44:38,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:38,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:38,010 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:38,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-04-06 20:44:38,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:44:38,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:38,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:44:38,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 268 proven. 2 refuted. 0 times theorem prover too weak. 4240 trivial. 0 not checked. [2022-04-06 20:44:38,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:39,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 1943 proven. 270 refuted. 0 times theorem prover too weak. 2297 trivial. 0 not checked. [2022-04-06 20:44:39,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128827635] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:39,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:39,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 6, 7] total 67 [2022-04-06 20:44:39,206 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:39,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [120442747] [2022-04-06 20:44:39,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [120442747] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:39,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:39,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-04-06 20:44:39,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470010759] [2022-04-06 20:44:39,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:39,206 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-04-06 20:44:39,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:39,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-04-06 20:44:39,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4216, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:44:39,207 INFO L87 Difference]: Start difference. First operand 177 states and 178 transitions. Second operand has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:43,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:43,532 INFO L93 Difference]: Finished difference Result 191 states and 194 transitions. [2022-04-06 20:44:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-04-06 20:44:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 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 176 [2022-04-06 20:44:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:43,533 INFO L225 Difference]: With dead ends: 191 [2022-04-06 20:44:43,533 INFO L226 Difference]: Without dead ends: 181 [2022-04-06 20:44:43,534 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 346 SyntacticMatches, 1 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=534, Invalid=14228, Unknown=0, NotChecked=0, Total=14762 [2022-04-06 20:44:43,534 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 174 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8938 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 9049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 8938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:43,534 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 124 Invalid, 9049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 8938 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-04-06 20:44:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-04-06 20:44:43,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2022-04-06 20:44:43,600 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 20:44:43,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2022-04-06 20:44:43,600 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 176 [2022-04-06 20:44:43,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:43,601 INFO L478 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2022-04-06 20:44:43,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.9655172413793105) internal successors, (172), 57 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:43,601 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2022-04-06 20:44:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-04-06 20:44:43,602 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:43,602 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:43,606 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-04-06 20:44:43,806 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 20:44:43,806 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:43,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:43,807 INFO L85 PathProgramCache]: Analyzing trace with hash -1030884766, now seen corresponding path program 109 times [2022-04-06 20:44:43,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:43,807 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [232425454] [2022-04-06 20:44:43,808 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:43,808 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:43,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1030884766, now seen corresponding path program 110 times [2022-04-06 20:44:43,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:43,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231487292] [2022-04-06 20:44:43,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:43,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:44:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:44:45,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 111 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:45,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:44:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231487292] [2022-04-06 20:44:45,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231487292] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:44:45,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483305264] [2022-04-06 20:44:45,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:44:45,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:44:45,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:44:45,260 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:44:45,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-04-06 20:44:45,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:44:45,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:44:45,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 20:44:45,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:44:46,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 111 proven. 4565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:46,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:44:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4676 backedges. 0 proven. 4676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:44:54,269 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483305264] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:44:54,269 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:44:54,269 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 61] total 120 [2022-04-06 20:44:54,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:44:54,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [232425454] [2022-04-06 20:44:54,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [232425454] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:44:54,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:44:54,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-04-06 20:44:54,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919113238] [2022-04-06 20:44:54,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:44:54,270 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-04-06 20:44:54,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:54,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-04-06 20:44:54,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3603, Invalid=10677, Unknown=0, NotChecked=0, Total=14280 [2022-04-06 20:44:54,272 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 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 20:44:58,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:44:58,702 INFO L93 Difference]: Finished difference Result 194 states and 197 transitions. [2022-04-06 20:44:58,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-04-06 20:44:58,703 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 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 20:44:58,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:44:58,703 INFO L225 Difference]: With dead ends: 194 [2022-04-06 20:44:58,703 INFO L226 Difference]: Without dead ends: 184 [2022-04-06 20:44:58,705 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 299 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=7129, Invalid=23671, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 20:44:58,705 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 177 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 9290 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 9403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 9290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:44:58,705 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 144 Invalid, 9403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 9290 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-04-06 20:44:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-04-06 20:44:58,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2022-04-06 20:44:58,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:44:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 184 transitions. [2022-04-06 20:44:58,763 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 184 transitions. Word has length 179 [2022-04-06 20:44:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:44:58,763 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 184 transitions. [2022-04-06 20:44:58,763 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 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 20:44:58,763 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 184 transitions. [2022-04-06 20:44:58,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-04-06 20:44:58,764 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:44:58,764 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:44:58,787 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 20:44:58,987 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 20:44:58,987 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:44:58,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:44:58,987 INFO L85 PathProgramCache]: Analyzing trace with hash -797186230, now seen corresponding path program 111 times [2022-04-06 20:44:58,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:44:58,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [902892049] [2022-04-06 20:44:58,989 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:44:58,989 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:44:58,989 INFO L85 PathProgramCache]: Analyzing trace with hash -797186230, now seen corresponding path program 112 times [2022-04-06 20:44:58,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:44:58,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935013367] [2022-04-06 20:44:58,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:44:58,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:44:59,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:00,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:00,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:00,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935013367] [2022-04-06 20:45:00,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935013367] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:00,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589099539] [2022-04-06 20:45:00,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:00,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:00,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:00,435 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:00,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-04-06 20:45:00,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:00,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:00,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 20:45:00,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:01,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:07,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4845 backedges. 113 proven. 4732 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:07,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589099539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:07,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:07,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 59, 60] total 119 [2022-04-06 20:45:07,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:07,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [902892049] [2022-04-06 20:45:07,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [902892049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:07,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:07,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-04-06 20:45:07,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858096122] [2022-04-06 20:45:07,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:07,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-04-06 20:45:07,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:07,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-04-06 20:45:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=10385, Unknown=0, NotChecked=0, Total=14042 [2022-04-06 20:45:07,095 INFO L87 Difference]: Start difference. First operand 183 states and 184 transitions. Second operand has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:11,594 INFO L93 Difference]: Finished difference Result 197 states and 200 transitions. [2022-04-06 20:45:11,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-04-06 20:45:11,595 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 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 182 [2022-04-06 20:45:11,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:11,600 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:45:11,600 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 20:45:11,602 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 307 SyntacticMatches, 2 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=7303, Invalid=23497, Unknown=0, NotChecked=0, Total=30800 [2022-04-06 20:45:11,602 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 180 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 9750 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 9865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 9750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:11,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 249 Invalid, 9865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 9750 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 20:45:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 20:45:11,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2022-04-06 20:45:11,663 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 20:45:11,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2022-04-06 20:45:11,664 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 182 [2022-04-06 20:45:11,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:11,664 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2022-04-06 20:45:11,664 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.966666666666667) internal successors, (178), 59 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:11,664 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2022-04-06 20:45:11,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-04-06 20:45:11,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:11,665 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:11,684 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:11,873 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 20:45:11,874 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:11,874 INFO L85 PathProgramCache]: Analyzing trace with hash -826087070, now seen corresponding path program 113 times [2022-04-06 20:45:11,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:11,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234756827] [2022-04-06 20:45:11,876 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:11,876 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:11,876 INFO L85 PathProgramCache]: Analyzing trace with hash -826087070, now seen corresponding path program 114 times [2022-04-06 20:45:11,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:11,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746341848] [2022-04-06 20:45:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:11,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:13,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:13,397 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 115 proven. 4902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:13,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746341848] [2022-04-06 20:45:13,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746341848] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:13,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532550006] [2022-04-06 20:45:13,397 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:13,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:13,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:13,399 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:13,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-04-06 20:45:13,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:13,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:13,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:45:13,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:13,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 283 proven. 2 refuted. 0 times theorem prover too weak. 4732 trivial. 0 not checked. [2022-04-06 20:45:13,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:14,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 2165 proven. 285 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2022-04-06 20:45:14,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532550006] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:14,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:14,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 6, 7] total 70 [2022-04-06 20:45:14,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:14,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234756827] [2022-04-06 20:45:14,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234756827] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:14,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:14,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-04-06 20:45:14,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697289384] [2022-04-06 20:45:14,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:14,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-04-06 20:45:14,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:14,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-04-06 20:45:14,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=4615, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:45:14,751 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 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 20:45:19,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:19,651 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2022-04-06 20:45:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-04-06 20:45:19,651 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 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 20:45:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:19,652 INFO L225 Difference]: With dead ends: 200 [2022-04-06 20:45:19,652 INFO L226 Difference]: Without dead ends: 190 [2022-04-06 20:45:19,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 364 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1858 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=561, Invalid=15695, Unknown=0, NotChecked=0, Total=16256 [2022-04-06 20:45:19,654 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 183 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 9886 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 10003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 9886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:19,654 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 79 Invalid, 10003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 9886 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:45:19,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-04-06 20:45:19,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2022-04-06 20:45:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 190 transitions. [2022-04-06 20:45:19,708 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 190 transitions. Word has length 185 [2022-04-06 20:45:19,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:19,708 INFO L478 AbstractCegarLoop]: Abstraction has 189 states and 190 transitions. [2022-04-06 20:45:19,708 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.9672131147540983) internal successors, (181), 60 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 20:45:19,708 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 190 transitions. [2022-04-06 20:45:19,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-04-06 20:45:19,709 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:19,709 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:19,712 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-04-06 20:45:19,909 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 20:45:19,909 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:19,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:19,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1477414986, now seen corresponding path program 115 times [2022-04-06 20:45:19,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:19,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1771195814] [2022-04-06 20:45:19,911 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:19,911 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1477414986, now seen corresponding path program 116 times [2022-04-06 20:45:19,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:19,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123008169] [2022-04-06 20:45:19,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:19,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:21,522 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 117 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:21,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:21,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123008169] [2022-04-06 20:45:21,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123008169] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:21,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42301262] [2022-04-06 20:45:21,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:45:21,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:21,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:21,524 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:21,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-04-06 20:45:21,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:45:21,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:21,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 123 conjunts are in the unsatisfiable core [2022-04-06 20:45:21,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 117 proven. 5075 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:22,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:30,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 0 proven. 5192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:30,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42301262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:30,842 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 64] total 126 [2022-04-06 20:45:30,842 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:30,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1771195814] [2022-04-06 20:45:30,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1771195814] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:30,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:30,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-04-06 20:45:30,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452186496] [2022-04-06 20:45:30,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:30,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-04-06 20:45:30,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:30,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-04-06 20:45:30,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3972, Invalid=11778, Unknown=0, NotChecked=0, Total=15750 [2022-04-06 20:45:30,844 INFO L87 Difference]: Start difference. First operand 189 states and 190 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:35,731 INFO L93 Difference]: Finished difference Result 203 states and 206 transitions. [2022-04-06 20:45:35,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-04-06 20:45:35,731 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 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 188 [2022-04-06 20:45:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:35,732 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:45:35,732 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 20:45:35,734 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 499 GetRequests, 314 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=7864, Invalid=26176, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:45:35,734 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 10286 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 10405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 10286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:35,734 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 124 Invalid, 10405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 10286 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-04-06 20:45:35,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 20:45:35,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-04-06 20:45:35,785 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 20:45:35,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2022-04-06 20:45:35,786 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 188 [2022-04-06 20:45:35,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:35,786 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2022-04-06 20:45:35,786 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:35,786 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2022-04-06 20:45:35,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-04-06 20:45:35,787 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:35,787 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:35,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-04-06 20:45:36,009 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 20:45:36,009 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:36,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:36,009 INFO L85 PathProgramCache]: Analyzing trace with hash 119709794, now seen corresponding path program 117 times [2022-04-06 20:45:36,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:36,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [163422620] [2022-04-06 20:45:36,011 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:36,011 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash 119709794, now seen corresponding path program 118 times [2022-04-06 20:45:36,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:36,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001269443] [2022-04-06 20:45:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:36,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:37,620 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:37,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001269443] [2022-04-06 20:45:37,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001269443] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:37,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865284582] [2022-04-06 20:45:37,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:45:37,620 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:37,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:37,621 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:37,622 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-04-06 20:45:38,277 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:45:38,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 122 conjunts are in the unsatisfiable core [2022-04-06 20:45:38,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:38,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:45,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5370 backedges. 119 proven. 5251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:45,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865284582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:45,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:45,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 62, 63] total 125 [2022-04-06 20:45:45,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:45,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [163422620] [2022-04-06 20:45:45,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [163422620] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:45,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:45,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-04-06 20:45:45,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283419526] [2022-04-06 20:45:45,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:45,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-04-06 20:45:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:45,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-04-06 20:45:45,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4029, Invalid=11471, Unknown=0, NotChecked=0, Total=15500 [2022-04-06 20:45:45,159 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 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 20:45:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:50,162 INFO L93 Difference]: Finished difference Result 206 states and 209 transitions. [2022-04-06 20:45:50,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-04-06 20:45:50,162 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 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 20:45:50,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:50,163 INFO L225 Difference]: With dead ends: 206 [2022-04-06 20:45:50,163 INFO L226 Difference]: Without dead ends: 196 [2022-04-06 20:45:50,165 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 322 SyntacticMatches, 2 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=8047, Invalid=25993, Unknown=0, NotChecked=0, Total=34040 [2022-04-06 20:45:50,165 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 10650 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 10771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 10650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:50,165 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 134 Invalid, 10771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 10650 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-04-06 20:45:50,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-04-06 20:45:50,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2022-04-06 20:45:50,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 196 transitions. [2022-04-06 20:45:50,226 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 196 transitions. Word has length 191 [2022-04-06 20:45:50,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:50,227 INFO L478 AbstractCegarLoop]: Abstraction has 195 states and 196 transitions. [2022-04-06 20:45:50,227 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9682539682539684) internal successors, (187), 62 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 20:45:50,227 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 196 transitions. [2022-04-06 20:45:50,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-04-06 20:45:50,228 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:50,228 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:50,249 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-04-06 20:45:50,442 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 20:45:50,442 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:50,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:50,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1568638646, now seen corresponding path program 119 times [2022-04-06 20:45:50,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:50,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [514957485] [2022-04-06 20:45:50,444 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:50,444 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:50,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1568638646, now seen corresponding path program 120 times [2022-04-06 20:45:50,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:50,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499012380] [2022-04-06 20:45:50,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:50,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:52,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:45:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:45:52,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 121 proven. 5430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:45:52,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:45:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499012380] [2022-04-06 20:45:52,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499012380] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:45:52,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962097978] [2022-04-06 20:45:52,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:45:52,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:45:52,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:45:52,086 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:45:52,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-04-06 20:45:52,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:45:52,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:45:52,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:45:52,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:45:52,801 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 298 proven. 2 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-04-06 20:45:52,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:45:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 5551 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 5251 trivial. 0 not checked. [2022-04-06 20:45:54,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962097978] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:45:54,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:45:54,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 7, 8] total 75 [2022-04-06 20:45:54,204 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:45:54,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [514957485] [2022-04-06 20:45:54,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [514957485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:45:54,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:45:54,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-04-06 20:45:54,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512570672] [2022-04-06 20:45:54,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:45:54,205 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-04-06 20:45:54,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:54,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-04-06 20:45:54,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=5127, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:45:54,206 INFO L87 Difference]: Start difference. First operand 195 states and 196 transitions. Second operand has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:59,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:45:59,376 INFO L93 Difference]: Finished difference Result 209 states and 212 transitions. [2022-04-06 20:45:59,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-04-06 20:45:59,377 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 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 194 [2022-04-06 20:45:59,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:45:59,377 INFO L225 Difference]: With dead ends: 209 [2022-04-06 20:45:59,377 INFO L226 Difference]: Without dead ends: 199 [2022-04-06 20:45:59,379 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 379 SyntacticMatches, 2 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=970, Invalid=17390, Unknown=0, NotChecked=0, Total=18360 [2022-04-06 20:45:59,379 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 10870 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 10993 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 10870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:45:59,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 19 Invalid, 10993 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 10870 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-04-06 20:45:59,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-04-06 20:45:59,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 198. [2022-04-06 20:45:59,464 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 20:45:59,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2022-04-06 20:45:59,465 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 194 [2022-04-06 20:45:59,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:45:59,465 INFO L478 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2022-04-06 20:45:59,465 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.96875) internal successors, (190), 63 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:45:59,465 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2022-04-06 20:45:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-04-06 20:45:59,466 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:45:59,466 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:45:59,473 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 20:45:59,670 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 20:45:59,670 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:45:59,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:45:59,671 INFO L85 PathProgramCache]: Analyzing trace with hash -795011230, now seen corresponding path program 121 times [2022-04-06 20:45:59,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:45:59,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1043411561] [2022-04-06 20:45:59,672 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:45:59,672 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:45:59,672 INFO L85 PathProgramCache]: Analyzing trace with hash -795011230, now seen corresponding path program 122 times [2022-04-06 20:45:59,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:45:59,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678883071] [2022-04-06 20:45:59,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:45:59,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:45:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:01,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:01,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:01,349 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 123 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:01,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678883071] [2022-04-06 20:46:01,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678883071] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:01,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89778164] [2022-04-06 20:46:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:46:01,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:01,350 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:01,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-04-06 20:46:01,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:46:01,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:01,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:46:01,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 123 proven. 5612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:05,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 5735 backedges. 0 proven. 5735 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:16,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89778164] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:16,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:16,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64, 67] total 192 [2022-04-06 20:46:16,984 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:16,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1043411561] [2022-04-06 20:46:16,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1043411561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:16,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:16,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-04-06 20:46:16,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146067162] [2022-04-06 20:46:16,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:16,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-04-06 20:46:16,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:16,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-04-06 20:46:16,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8504, Invalid=28168, Unknown=0, NotChecked=0, Total=36672 [2022-04-06 20:46:16,987 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 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 20:46:22,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:22,395 INFO L93 Difference]: Finished difference Result 212 states and 215 transitions. [2022-04-06 20:46:22,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-04-06 20:46:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 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 20:46:22,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:22,396 INFO L225 Difference]: With dead ends: 212 [2022-04-06 20:46:22,396 INFO L226 Difference]: Without dead ends: 202 [2022-04-06 20:46:22,399 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 523 GetRequests, 270 SyntacticMatches, 1 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15687 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=12780, Invalid=51482, Unknown=0, NotChecked=0, Total=64262 [2022-04-06 20:46:22,399 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 195 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11246 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 11246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:22,399 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 29 Invalid, 11371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 11246 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 20:46:22,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-04-06 20:46:22,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2022-04-06 20:46:22,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 202 transitions. [2022-04-06 20:46:22,459 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 202 transitions. Word has length 197 [2022-04-06 20:46:22,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:22,460 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 202 transitions. [2022-04-06 20:46:22,460 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 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 20:46:22,460 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 202 transitions. [2022-04-06 20:46:22,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-04-06 20:46:22,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:22,461 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:22,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-04-06 20:46:22,661 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 20:46:22,661 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:22,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:22,661 INFO L85 PathProgramCache]: Analyzing trace with hash -455171510, now seen corresponding path program 123 times [2022-04-06 20:46:22,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:22,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1306605446] [2022-04-06 20:46:22,662 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:22,663 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash -455171510, now seen corresponding path program 124 times [2022-04-06 20:46:22,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:22,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745428427] [2022-04-06 20:46:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:22,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 125 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:24,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:24,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745428427] [2022-04-06 20:46:24,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745428427] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:24,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716718648] [2022-04-06 20:46:24,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:46:24,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:24,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:24,409 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:24,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-04-06 20:46:24,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:46:24,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:24,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 133 conjunts are in the unsatisfiable core [2022-04-06 20:46:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:28,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 125 proven. 5797 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:28,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:45,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5922 backedges. 0 proven. 5919 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:45,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716718648] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:45,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:45,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 65, 68] total 195 [2022-04-06 20:46:45,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:45,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1306605446] [2022-04-06 20:46:45,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1306605446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:45,053 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:45,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-04-06 20:46:45,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137321915] [2022-04-06 20:46:45,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:45,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-04-06 20:46:45,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:45,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-04-06 20:46:45,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8767, Invalid=29061, Unknown=2, NotChecked=0, Total=37830 [2022-04-06 20:46:45,056 INFO L87 Difference]: Start difference. First operand 201 states and 202 transitions. Second operand has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:50,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:46:50,692 INFO L93 Difference]: Finished difference Result 215 states and 218 transitions. [2022-04-06 20:46:50,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-04-06 20:46:50,693 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 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 200 [2022-04-06 20:46:50,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:46:50,694 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:46:50,694 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 20:46:50,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 531 GetRequests, 273 SyntacticMatches, 2 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16255 ImplicationChecksByTransitivity, 21.8s TimeCoverageRelationStatistics Valid=13175, Invalid=53129, Unknown=2, NotChecked=0, Total=66306 [2022-04-06 20:46:50,699 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 198 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 11664 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 11791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 11664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:46:50,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 69 Invalid, 11791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 11664 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-04-06 20:46:50,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 20:46:50,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 204. [2022-04-06 20:46:50,765 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 20:46:50,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2022-04-06 20:46:50,765 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 200 [2022-04-06 20:46:50,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:46:50,765 INFO L478 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2022-04-06 20:46:50,765 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 65 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:46:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2022-04-06 20:46:50,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-04-06 20:46:50,766 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:46:50,766 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:46:50,782 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-04-06 20:46:50,966 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 20:46:50,967 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:46:50,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:46:50,967 INFO L85 PathProgramCache]: Analyzing trace with hash 472010338, now seen corresponding path program 125 times [2022-04-06 20:46:50,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:50,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1309576102] [2022-04-06 20:46:50,969 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:46:50,969 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:46:50,969 INFO L85 PathProgramCache]: Analyzing trace with hash 472010338, now seen corresponding path program 126 times [2022-04-06 20:46:50,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:46:50,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385870237] [2022-04-06 20:46:50,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:46:50,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:46:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:52,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:46:52,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:46:52,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 127 proven. 5985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:46:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:46:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385870237] [2022-04-06 20:46:52,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385870237] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:46:52,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890582981] [2022-04-06 20:46:52,773 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:46:52,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:46:52,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:46:52,774 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:46:52,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-04-06 20:46:52,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:46:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:46:52,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:46:52,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:46:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 313 proven. 2 refuted. 0 times theorem prover too weak. 5797 trivial. 0 not checked. [2022-04-06 20:46:53,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:46:55,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6112 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 5797 trivial. 0 not checked. [2022-04-06 20:46:55,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890582981] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:46:55,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:46:55,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 7, 8] total 78 [2022-04-06 20:46:55,030 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:46:55,030 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1309576102] [2022-04-06 20:46:55,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1309576102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:46:55,030 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:46:55,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-04-06 20:46:55,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632286316] [2022-04-06 20:46:55,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:46:55,031 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-04-06 20:46:55,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:46:55,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-04-06 20:46:55,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=5565, Unknown=0, NotChecked=0, Total=6006 [2022-04-06 20:46:55,032 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 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 20:47:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:00,843 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-04-06 20:47:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-04-06 20:47:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 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 20:47:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:00,844 INFO L225 Difference]: With dead ends: 218 [2022-04-06 20:47:00,844 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 20:47:00,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 397 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1015, Invalid=19007, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:47:00,845 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11998 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 12127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 11998 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:00,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 34 Invalid, 12127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 11998 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-04-06 20:47:00,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 20:47:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-04-06 20:47:00,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:00,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 208 transitions. [2022-04-06 20:47:00,905 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 208 transitions. Word has length 203 [2022-04-06 20:47:00,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:00,905 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 208 transitions. [2022-04-06 20:47:00,905 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.970149253731343) internal successors, (199), 66 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 20:47:00,905 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 208 transitions. [2022-04-06 20:47:00,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-04-06 20:47:00,906 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:00,906 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:00,924 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-04-06 20:47:01,113 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 20:47:01,113 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:01,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1211763530, now seen corresponding path program 127 times [2022-04-06 20:47:01,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:01,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1372698807] [2022-04-06 20:47:01,115 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:01,115 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:01,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1211763530, now seen corresponding path program 128 times [2022-04-06 20:47:01,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:01,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142219110] [2022-04-06 20:47:01,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:01,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:01,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:03,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 129 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:03,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:03,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142219110] [2022-04-06 20:47:03,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142219110] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:03,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138513195] [2022-04-06 20:47:03,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:03,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:03,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:03,016 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:03,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-04-06 20:47:03,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:03,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:03,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 131 conjunts are in the unsatisfiable core [2022-04-06 20:47:03,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 129 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:03,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6305 backedges. 129 proven. 6176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:10,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138513195] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:10,168 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:10,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 67, 67] total 134 [2022-04-06 20:47:10,168 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:10,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1372698807] [2022-04-06 20:47:10,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1372698807] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:10,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:10,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-04-06 20:47:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558348188] [2022-04-06 20:47:10,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:10,169 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-04-06 20:47:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:10,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-04-06 20:47:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4620, Invalid=13202, Unknown=0, NotChecked=0, Total=17822 [2022-04-06 20:47:10,171 INFO L87 Difference]: Start difference. First operand 207 states and 208 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:16,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:16,212 INFO L93 Difference]: Finished difference Result 221 states and 224 transitions. [2022-04-06 20:47:16,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-04-06 20:47:16,213 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 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 206 [2022-04-06 20:47:16,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:16,214 INFO L225 Difference]: With dead ends: 221 [2022-04-06 20:47:16,214 INFO L226 Difference]: Without dead ends: 211 [2022-04-06 20:47:16,215 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 547 GetRequests, 348 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2214 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=9233, Invalid=30169, Unknown=0, NotChecked=0, Total=39402 [2022-04-06 20:47:16,215 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 204 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 12740 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 12871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 12740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:16,216 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 334 Invalid, 12871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 12740 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:47:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2022-04-06 20:47:16,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 210. [2022-04-06 20:47:16,305 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 20:47:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2022-04-06 20:47:16,305 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 206 [2022-04-06 20:47:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:16,306 INFO L478 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2022-04-06 20:47:16,306 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2022-04-06 20:47:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-04-06 20:47:16,307 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:16,307 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:16,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-04-06 20:47:16,523 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 20:47:16,523 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:16,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1721910626, now seen corresponding path program 129 times [2022-04-06 20:47:16,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:16,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1958110518] [2022-04-06 20:47:16,525 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:16,525 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:16,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1721910626, now seen corresponding path program 130 times [2022-04-06 20:47:16,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:16,525 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666760457] [2022-04-06 20:47:16,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:16,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:18,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:18,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:18,451 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:18,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:18,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666760457] [2022-04-06 20:47:18,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666760457] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:18,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407823202] [2022-04-06 20:47:18,452 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:47:18,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:18,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:18,453 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:18,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-04-06 20:47:18,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:47:18,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 134 conjunts are in the unsatisfiable core [2022-04-06 20:47:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:19,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:19,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6501 backedges. 131 proven. 6370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:26,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407823202] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:26,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:26,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 68, 69] total 137 [2022-04-06 20:47:26,897 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:26,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1958110518] [2022-04-06 20:47:26,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1958110518] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:26,897 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:26,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-04-06 20:47:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992772592] [2022-04-06 20:47:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:26,898 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-04-06 20:47:26,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-04-06 20:47:26,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4827, Invalid=13805, Unknown=0, NotChecked=0, Total=18632 [2022-04-06 20:47:26,899 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 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 20:47:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:33,055 INFO L93 Difference]: Finished difference Result 224 states and 227 transitions. [2022-04-06 20:47:33,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-04-06 20:47:33,055 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 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 20:47:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:33,056 INFO L225 Difference]: With dead ends: 224 [2022-04-06 20:47:33,056 INFO L226 Difference]: Without dead ends: 214 [2022-04-06 20:47:33,058 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 352 SyntacticMatches, 2 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=9643, Invalid=31363, Unknown=0, NotChecked=0, Total=41006 [2022-04-06 20:47:33,058 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 207 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12960 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 13093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 12960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:33,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 194 Invalid, 13093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 12960 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-04-06 20:47:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2022-04-06 20:47:33,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2022-04-06 20:47:33,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 214 transitions. [2022-04-06 20:47:33,130 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 214 transitions. Word has length 209 [2022-04-06 20:47:33,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:33,131 INFO L478 AbstractCegarLoop]: Abstraction has 213 states and 214 transitions. [2022-04-06 20:47:33,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.971014492753623) internal successors, (205), 68 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 20:47:33,131 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 214 transitions. [2022-04-06 20:47:33,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-04-06 20:47:33,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:33,132 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:33,157 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 20:47:33,355 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 20:47:33,355 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:33,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -375212982, now seen corresponding path program 131 times [2022-04-06 20:47:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:33,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900826039] [2022-04-06 20:47:33,357 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:33,357 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:33,357 INFO L85 PathProgramCache]: Analyzing trace with hash -375212982, now seen corresponding path program 132 times [2022-04-06 20:47:33,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:33,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399439059] [2022-04-06 20:47:33,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:33,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:35,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:35,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:35,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 133 proven. 6567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:35,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399439059] [2022-04-06 20:47:35,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399439059] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:35,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175786653] [2022-04-06 20:47:35,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:47:35,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:35,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:35,338 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:35,343 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-04-06 20:47:35,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:47:35,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:35,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:47:35,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 328 proven. 2 refuted. 0 times theorem prover too weak. 6370 trivial. 0 not checked. [2022-04-06 20:47:36,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6700 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 6370 trivial. 0 not checked. [2022-04-06 20:47:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175786653] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:37,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:37,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 7, 8] total 81 [2022-04-06 20:47:37,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:37,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900826039] [2022-04-06 20:47:37,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900826039] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:37,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:37,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-04-06 20:47:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237038826] [2022-04-06 20:47:37,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:37,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-04-06 20:47:37,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:37,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-04-06 20:47:37,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=6021, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:47:37,714 INFO L87 Difference]: Start difference. First operand 213 states and 214 transitions. Second operand has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:44,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:47:44,436 INFO L93 Difference]: Finished difference Result 227 states and 230 transitions. [2022-04-06 20:47:44,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-04-06 20:47:44,437 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 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 212 [2022-04-06 20:47:44,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:47:44,438 INFO L225 Difference]: With dead ends: 227 [2022-04-06 20:47:44,438 INFO L226 Difference]: Without dead ends: 217 [2022-04-06 20:47:44,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 415 SyntacticMatches, 2 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=1060, Invalid=20696, Unknown=0, NotChecked=0, Total=21756 [2022-04-06 20:47:44,439 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 210 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 13528 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 13663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 13528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:47:44,439 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 339 Invalid, 13663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 13528 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:47:44,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-04-06 20:47:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2022-04-06 20:47:44,498 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 20:47:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2022-04-06 20:47:44,498 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 212 [2022-04-06 20:47:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:47:44,498 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2022-04-06 20:47:44,498 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.9714285714285715) internal successors, (208), 69 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:47:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2022-04-06 20:47:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-04-06 20:47:44,499 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:47:44,499 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:47:44,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-04-06 20:47:44,699 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 20:47:44,700 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:47:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:47:44,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1190331294, now seen corresponding path program 133 times [2022-04-06 20:47:44,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:44,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [306155298] [2022-04-06 20:47:44,701 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:47:44,701 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:47:44,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1190331294, now seen corresponding path program 134 times [2022-04-06 20:47:44,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:47:44,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997073564] [2022-04-06 20:47:44,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:47:44,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:47:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:46,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:47:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:47:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 135 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:46,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:47:46,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997073564] [2022-04-06 20:47:46,700 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997073564] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:47:46,700 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928131382] [2022-04-06 20:47:46,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:47:46,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:47:46,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:47:46,701 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:47:46,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-04-06 20:47:46,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:47:46,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:47:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 138 conjunts are in the unsatisfiable core [2022-04-06 20:47:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:47:47,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 135 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:47,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:47:55,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6902 backedges. 135 proven. 6767 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:47:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928131382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:47:55,712 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:47:55,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 70, 71] total 141 [2022-04-06 20:47:55,712 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:47:55,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [306155298] [2022-04-06 20:47:55,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [306155298] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:47:55,713 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:47:55,713 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-04-06 20:47:55,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609328100] [2022-04-06 20:47:55,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:47:55,713 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-04-06 20:47:55,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:47:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-04-06 20:47:55,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5109, Invalid=14631, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:47:55,714 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 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 20:48:02,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:02,306 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2022-04-06 20:48:02,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-04-06 20:48:02,306 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 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 20:48:02,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:02,307 INFO L225 Difference]: With dead ends: 230 [2022-04-06 20:48:02,307 INFO L226 Difference]: Without dead ends: 220 [2022-04-06 20:48:02,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 362 SyntacticMatches, 2 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2487 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=10207, Invalid=33265, Unknown=0, NotChecked=0, Total=43472 [2022-04-06 20:48:02,309 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 213 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 13934 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 14071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 13934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:02,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 344 Invalid, 14071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 13934 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-04-06 20:48:02,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-04-06 20:48:02,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2022-04-06 20:48:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 220 transitions. [2022-04-06 20:48:02,390 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 220 transitions. Word has length 215 [2022-04-06 20:48:02,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:02,390 INFO L478 AbstractCegarLoop]: Abstraction has 219 states and 220 transitions. [2022-04-06 20:48:02,390 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 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 20:48:02,390 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 220 transitions. [2022-04-06 20:48:02,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-04-06 20:48:02,391 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:02,391 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:02,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2022-04-06 20:48:02,599 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 20:48:02,599 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:02,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:02,600 INFO L85 PathProgramCache]: Analyzing trace with hash -634872502, now seen corresponding path program 135 times [2022-04-06 20:48:02,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:02,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656210140] [2022-04-06 20:48:02,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:02,601 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:02,601 INFO L85 PathProgramCache]: Analyzing trace with hash -634872502, now seen corresponding path program 136 times [2022-04-06 20:48:02,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:02,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531103900] [2022-04-06 20:48:02,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:02,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:02,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:04,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:04,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 137 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:04,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531103900] [2022-04-06 20:48:04,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531103900] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:04,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395019527] [2022-04-06 20:48:04,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:48:04,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:04,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:04,704 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:04,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-04-06 20:48:04,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:48:04,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:04,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 140 conjunts are in the unsatisfiable core [2022-04-06 20:48:04,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 137 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:05,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 7107 backedges. 137 proven. 6970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:13,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395019527] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:13,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:13,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 71, 72] total 143 [2022-04-06 20:48:13,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:13,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656210140] [2022-04-06 20:48:13,936 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656210140] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:13,936 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:13,936 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-04-06 20:48:13,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055424757] [2022-04-06 20:48:13,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:13,936 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-04-06 20:48:13,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:13,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-04-06 20:48:13,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=15053, Unknown=0, NotChecked=0, Total=20306 [2022-04-06 20:48:13,937 INFO L87 Difference]: Start difference. First operand 219 states and 220 transitions. Second operand has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:20,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:20,706 INFO L93 Difference]: Finished difference Result 233 states and 236 transitions. [2022-04-06 20:48:20,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-04-06 20:48:20,706 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 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 218 [2022-04-06 20:48:20,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:20,707 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:48:20,707 INFO L226 Difference]: Without dead ends: 223 [2022-04-06 20:48:20,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 367 SyntacticMatches, 2 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2558 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=10495, Invalid=34237, Unknown=0, NotChecked=0, Total=44732 [2022-04-06 20:48:20,709 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 216 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 14184 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 14323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 14184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:20,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 214 Invalid, 14323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 14184 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-04-06 20:48:20,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-04-06 20:48:20,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 222. [2022-04-06 20:48:20,799 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 20:48:20,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2022-04-06 20:48:20,799 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 218 [2022-04-06 20:48:20,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:20,799 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2022-04-06 20:48:20,799 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.9722222222222223) internal successors, (214), 71 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:48:20,799 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2022-04-06 20:48:20,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-04-06 20:48:20,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:20,800 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:20,824 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 20:48:21,023 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 20:48:21,023 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:21,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:21,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1470991518, now seen corresponding path program 137 times [2022-04-06 20:48:21,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:21,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523007134] [2022-04-06 20:48:21,025 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:21,025 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:21,025 INFO L85 PathProgramCache]: Analyzing trace with hash -1470991518, now seen corresponding path program 138 times [2022-04-06 20:48:21,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:21,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859982124] [2022-04-06 20:48:21,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:21,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:21,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:23,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:23,356 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 139 proven. 7176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:23,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:23,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859982124] [2022-04-06 20:48:23,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859982124] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:23,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116539151] [2022-04-06 20:48:23,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:48:23,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:23,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:23,357 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:23,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-04-06 20:48:23,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:48:23,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:23,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:48:23,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 343 proven. 2 refuted. 0 times theorem prover too weak. 6970 trivial. 0 not checked. [2022-04-06 20:48:23,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:24,866 INFO L134 CoverageAnalysis]: Checked inductivity of 7315 backedges. 3173 proven. 345 refuted. 0 times theorem prover too weak. 3797 trivial. 0 not checked. [2022-04-06 20:48:24,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116539151] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:24,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:24,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 6, 7] total 82 [2022-04-06 20:48:24,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:24,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523007134] [2022-04-06 20:48:24,867 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523007134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:24,867 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:24,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-04-06 20:48:24,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157326984] [2022-04-06 20:48:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:24,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-04-06 20:48:24,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:24,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-04-06 20:48:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=6391, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:48:24,868 INFO L87 Difference]: Start difference. First operand 222 states and 223 transitions. Second operand has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 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 20:48:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:48:31,973 INFO L93 Difference]: Finished difference Result 236 states and 239 transitions. [2022-04-06 20:48:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-04-06 20:48:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 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 20:48:31,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:48:31,974 INFO L225 Difference]: With dead ends: 236 [2022-04-06 20:48:31,974 INFO L226 Difference]: Without dead ends: 226 [2022-04-06 20:48:31,975 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 587 GetRequests, 436 SyntacticMatches, 1 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2656 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=669, Invalid=22283, Unknown=0, NotChecked=0, Total=22952 [2022-04-06 20:48:31,975 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 14614 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 14755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 14614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 20:48:31,975 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 229 Invalid, 14755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 14614 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 20:48:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-04-06 20:48:32,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2022-04-06 20:48:32,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 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 20:48:32,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 226 transitions. [2022-04-06 20:48:32,045 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 226 transitions. Word has length 221 [2022-04-06 20:48:32,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:48:32,046 INFO L478 AbstractCegarLoop]: Abstraction has 225 states and 226 transitions. [2022-04-06 20:48:32,046 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.9726027397260273) internal successors, (217), 72 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 20:48:32,046 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 226 transitions. [2022-04-06 20:48:32,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-04-06 20:48:32,047 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:48:32,047 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:48:32,071 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 20:48:32,269 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 20:48:32,270 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:48:32,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:48:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 517719626, now seen corresponding path program 139 times [2022-04-06 20:48:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:32,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1138471629] [2022-04-06 20:48:32,271 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:48:32,271 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:48:32,271 INFO L85 PathProgramCache]: Analyzing trace with hash 517719626, now seen corresponding path program 140 times [2022-04-06 20:48:32,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:48:32,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000092856] [2022-04-06 20:48:32,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:48:32,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:48:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:34,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:48:34,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:48:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 141 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:34,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:48:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000092856] [2022-04-06 20:48:34,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000092856] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:48:34,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663687354] [2022-04-06 20:48:34,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:48:34,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:48:34,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:48:34,477 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:48:34,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-04-06 20:48:34,616 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:48:34,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:48:34,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 149 conjunts are in the unsatisfiable core [2022-04-06 20:48:34,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:48:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 141 proven. 7385 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:39,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:48:53,950 INFO L134 CoverageAnalysis]: Checked inductivity of 7526 backedges. 0 proven. 7526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:48:53,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663687354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:48:53,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:48:53,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 73, 76] total 219 [2022-04-06 20:48:53,951 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:48:53,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1138471629] [2022-04-06 20:48:53,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1138471629] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:48:53,951 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:48:53,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-04-06 20:48:53,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388227151] [2022-04-06 20:48:53,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:48:53,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-04-06 20:48:53,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:48:53,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-04-06 20:48:53,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11015, Invalid=36727, Unknown=0, NotChecked=0, Total=47742 [2022-04-06 20:48:53,954 INFO L87 Difference]: Start difference. First operand 225 states and 226 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:01,262 INFO L93 Difference]: Finished difference Result 239 states and 242 transitions. [2022-04-06 20:49:01,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-04-06 20:49:01,263 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 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 224 [2022-04-06 20:49:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:01,263 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:49:01,263 INFO L226 Difference]: Without dead ends: 229 [2022-04-06 20:49:01,267 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 305 SyntacticMatches, 2 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20591 ImplicationChecksByTransitivity, 21.4s TimeCoverageRelationStatistics Valid=16551, Invalid=67259, Unknown=0, NotChecked=0, Total=83810 [2022-04-06 20:49:01,267 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 15014 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 15157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 15014 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:01,267 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 214 Invalid, 15157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 15014 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 20:49:01,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2022-04-06 20:49:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 228. [2022-04-06 20:49:01,344 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 20:49:01,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 229 transitions. [2022-04-06 20:49:01,345 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 229 transitions. Word has length 224 [2022-04-06 20:49:01,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:01,345 INFO L478 AbstractCegarLoop]: Abstraction has 228 states and 229 transitions. [2022-04-06 20:49:01,345 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:01,345 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 229 transitions. [2022-04-06 20:49:01,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-04-06 20:49:01,346 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:01,346 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:01,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-04-06 20:49:01,556 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 20:49:01,556 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:01,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:01,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1432529506, now seen corresponding path program 141 times [2022-04-06 20:49:01,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:01,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1768258065] [2022-04-06 20:49:01,558 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:01,558 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:01,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1432529506, now seen corresponding path program 142 times [2022-04-06 20:49:01,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:01,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36753754] [2022-04-06 20:49:01,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:01,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:03,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:03,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:03,825 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:03,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36753754] [2022-04-06 20:49:03,825 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36753754] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:03,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876023458] [2022-04-06 20:49:03,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:49:03,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:03,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:03,827 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:03,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-04-06 20:49:04,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:49:04,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:04,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 146 conjunts are in the unsatisfiable core [2022-04-06 20:49:04,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:04,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:04,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:13,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7740 backedges. 143 proven. 7597 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:13,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876023458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:13,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:13,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 75] total 149 [2022-04-06 20:49:13,914 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:13,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1768258065] [2022-04-06 20:49:13,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1768258065] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:13,914 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:13,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-04-06 20:49:13,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416513148] [2022-04-06 20:49:13,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:13,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-04-06 20:49:13,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:13,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-04-06 20:49:13,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5697, Invalid=16355, Unknown=0, NotChecked=0, Total=22052 [2022-04-06 20:49:13,916 INFO L87 Difference]: Start difference. First operand 228 states and 229 transitions. Second operand has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 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 20:49:21,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:21,293 INFO L93 Difference]: Finished difference Result 242 states and 245 transitions. [2022-04-06 20:49:21,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-04-06 20:49:21,293 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 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 20:49:21,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:21,294 INFO L225 Difference]: With dead ends: 242 [2022-04-06 20:49:21,294 INFO L226 Difference]: Without dead ends: 232 [2022-04-06 20:49:21,296 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2777 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=11383, Invalid=37237, Unknown=0, NotChecked=0, Total=48620 [2022-04-06 20:49:21,296 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 15474 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 15619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 15474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:21,296 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 244 Invalid, 15619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 15474 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-04-06 20:49:21,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-04-06 20:49:21,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2022-04-06 20:49:21,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 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 20:49:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 232 transitions. [2022-04-06 20:49:21,365 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 232 transitions. Word has length 227 [2022-04-06 20:49:21,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:21,365 INFO L478 AbstractCegarLoop]: Abstraction has 231 states and 232 transitions. [2022-04-06 20:49:21,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.973333333333333) internal successors, (223), 74 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 20:49:21,365 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 232 transitions. [2022-04-06 20:49:21,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-04-06 20:49:21,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:21,366 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:21,384 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 20:49:21,566 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 20:49:21,567 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:21,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:21,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1328795830, now seen corresponding path program 143 times [2022-04-06 20:49:21,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:21,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [987098631] [2022-04-06 20:49:21,569 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:21,569 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:21,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1328795830, now seen corresponding path program 144 times [2022-04-06 20:49:21,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:21,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406320422] [2022-04-06 20:49:21,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:21,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:24,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 145 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:24,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406320422] [2022-04-06 20:49:24,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406320422] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:24,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524878365] [2022-04-06 20:49:24,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:49:24,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:24,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:24,008 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:24,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-04-06 20:49:24,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:49:24,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 20:49:24,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 358 proven. 2 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-04-06 20:49:24,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:26,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7957 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 7597 trivial. 0 not checked. [2022-04-06 20:49:26,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524878365] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:26,673 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:26,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 7, 8] total 87 [2022-04-06 20:49:26,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:26,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [987098631] [2022-04-06 20:49:26,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [987098631] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:26,674 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:26,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-04-06 20:49:26,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871418399] [2022-04-06 20:49:26,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:26,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-04-06 20:49:26,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:26,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-04-06 20:49:26,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=495, Invalid=6987, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:49:26,675 INFO L87 Difference]: Start difference. First operand 231 states and 232 transitions. Second operand has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:34,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:49:34,323 INFO L93 Difference]: Finished difference Result 245 states and 248 transitions. [2022-04-06 20:49:34,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-04-06 20:49:34,324 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 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 230 [2022-04-06 20:49:34,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:49:34,325 INFO L225 Difference]: With dead ends: 245 [2022-04-06 20:49:34,325 INFO L226 Difference]: Without dead ends: 235 [2022-04-06 20:49:34,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 611 GetRequests, 451 SyntacticMatches, 2 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2969 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1150, Invalid=24290, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:49:34,326 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 15910 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 16057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 15910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:49:34,326 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 249 Invalid, 16057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 15910 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-04-06 20:49:34,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-04-06 20:49:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 234. [2022-04-06 20:49:34,406 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 20:49:34,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 235 transitions. [2022-04-06 20:49:34,407 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 235 transitions. Word has length 230 [2022-04-06 20:49:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:49:34,407 INFO L478 AbstractCegarLoop]: Abstraction has 234 states and 235 transitions. [2022-04-06 20:49:34,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.973684210526316) internal successors, (226), 75 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:49:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 235 transitions. [2022-04-06 20:49:34,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-04-06 20:49:34,408 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:49:34,408 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:49:34,411 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2022-04-06 20:49:34,608 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 20:49:34,608 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:49:34,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:49:34,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1831706978, now seen corresponding path program 145 times [2022-04-06 20:49:34,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:34,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [604492565] [2022-04-06 20:49:34,610 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:49:34,610 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:49:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1831706978, now seen corresponding path program 146 times [2022-04-06 20:49:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:49:34,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665867989] [2022-04-06 20:49:34,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:49:34,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:49:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:37,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:49:37,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:49:37,022 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 147 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:37,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:49:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665867989] [2022-04-06 20:49:37,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665867989] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:49:37,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509553886] [2022-04-06 20:49:37,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:49:37,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:49:37,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:49:37,023 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:49:37,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-04-06 20:49:37,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:49:37,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:49:37,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 152 conjunts are in the unsatisfiable core [2022-04-06 20:49:37,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:49:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 147 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:42,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:49:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 8177 backedges. 147 proven. 8030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:49:53,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509553886] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:49:53,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:49:53,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 227 [2022-04-06 20:49:53,696 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:49:53,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [604492565] [2022-04-06 20:49:53,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [604492565] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:49:53,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:49:53,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-04-06 20:49:53,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136092985] [2022-04-06 20:49:53,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:49:53,697 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-04-06 20:49:53,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:49:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-04-06 20:49:53,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11849, Invalid=39453, Unknown=0, NotChecked=0, Total=51302 [2022-04-06 20:49:53,699 INFO L87 Difference]: Start difference. First operand 234 states and 235 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 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 20:50:01,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:01,717 INFO L93 Difference]: Finished difference Result 248 states and 251 transitions. [2022-04-06 20:50:01,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-04-06 20:50:01,717 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 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 20:50:01,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:01,718 INFO L225 Difference]: With dead ends: 248 [2022-04-06 20:50:01,718 INFO L226 Difference]: Without dead ends: 238 [2022-04-06 20:50:01,721 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 619 GetRequests, 319 SyntacticMatches, 1 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22276 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=17841, Invalid=72459, Unknown=0, NotChecked=0, Total=90300 [2022-04-06 20:50:01,721 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 231 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 16502 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 16651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 16502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:01,721 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 379 Invalid, 16651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 16502 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-04-06 20:50:01,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-04-06 20:50:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2022-04-06 20:50:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 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 20:50:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 238 transitions. [2022-04-06 20:50:01,791 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 238 transitions. Word has length 233 [2022-04-06 20:50:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:01,791 INFO L478 AbstractCegarLoop]: Abstraction has 237 states and 238 transitions. [2022-04-06 20:50:01,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 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 20:50:01,791 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 238 transitions. [2022-04-06 20:50:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-04-06 20:50:01,792 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:01,792 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:01,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-04-06 20:50:01,992 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 20:50:01,993 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:01,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:01,993 INFO L85 PathProgramCache]: Analyzing trace with hash 2097797194, now seen corresponding path program 147 times [2022-04-06 20:50:01,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:01,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [723473310] [2022-04-06 20:50:01,995 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:01,995 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:01,995 INFO L85 PathProgramCache]: Analyzing trace with hash 2097797194, now seen corresponding path program 148 times [2022-04-06 20:50:01,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:01,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916050458] [2022-04-06 20:50:01,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:01,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:02,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:04,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 149 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:04,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916050458] [2022-04-06 20:50:04,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916050458] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:04,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882727908] [2022-04-06 20:50:04,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:50:04,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:04,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:04,465 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:04,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-04-06 20:50:04,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:50:04,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:04,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 154 conjunts are in the unsatisfiable core [2022-04-06 20:50:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 149 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:10,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 8400 backedges. 149 proven. 8251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:21,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882727908] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:21,803 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:21,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78, 78] total 230 [2022-04-06 20:50:21,803 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:21,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [723473310] [2022-04-06 20:50:21,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [723473310] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:21,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:21,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-04-06 20:50:21,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813944858] [2022-04-06 20:50:21,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:21,804 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-04-06 20:50:21,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:21,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-04-06 20:50:21,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12159, Invalid=40511, Unknown=0, NotChecked=0, Total=52670 [2022-04-06 20:50:21,806 INFO L87 Difference]: Start difference. First operand 237 states and 238 transitions. Second operand has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:29,841 INFO L93 Difference]: Finished difference Result 251 states and 254 transitions. [2022-04-06 20:50:29,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-04-06 20:50:29,841 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 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 236 [2022-04-06 20:50:29,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:29,842 INFO L225 Difference]: With dead ends: 251 [2022-04-06 20:50:29,842 INFO L226 Difference]: Without dead ends: 241 [2022-04-06 20:50:29,845 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 627 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22877 ImplicationChecksByTransitivity, 20.0s TimeCoverageRelationStatistics Valid=18307, Invalid=74413, Unknown=0, NotChecked=0, Total=92720 [2022-04-06 20:50:29,845 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 234 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 16632 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 16783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 16632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:29,845 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 119 Invalid, 16783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 16632 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-04-06 20:50:29,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-04-06 20:50:29,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2022-04-06 20:50:29,914 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 20:50:29,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 241 transitions. [2022-04-06 20:50:29,914 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 241 transitions. Word has length 236 [2022-04-06 20:50:29,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:29,914 INFO L478 AbstractCegarLoop]: Abstraction has 240 states and 241 transitions. [2022-04-06 20:50:29,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.9743589743589745) internal successors, (232), 77 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:50:29,914 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 241 transitions. [2022-04-06 20:50:29,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-04-06 20:50:29,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:29,916 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:29,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-04-06 20:50:30,119 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 20:50:30,119 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:30,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:30,119 INFO L85 PathProgramCache]: Analyzing trace with hash 681793634, now seen corresponding path program 149 times [2022-04-06 20:50:30,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:30,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1064630962] [2022-04-06 20:50:30,120 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:30,121 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:30,121 INFO L85 PathProgramCache]: Analyzing trace with hash 681793634, now seen corresponding path program 150 times [2022-04-06 20:50:30,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:30,121 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659534803] [2022-04-06 20:50:30,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:30,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:32,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 151 proven. 8475 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:32,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:32,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659534803] [2022-04-06 20:50:32,652 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659534803] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:32,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610444138] [2022-04-06 20:50:32,652 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:50:32,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:32,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:32,653 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:32,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-04-06 20:50:32,703 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:50:32,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:32,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:50:32,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:33,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 373 proven. 2 refuted. 0 times theorem prover too weak. 8251 trivial. 0 not checked. [2022-04-06 20:50:33,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:50:34,288 INFO L134 CoverageAnalysis]: Checked inductivity of 8626 backedges. 3749 proven. 375 refuted. 0 times theorem prover too weak. 4502 trivial. 0 not checked. [2022-04-06 20:50:34,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610444138] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:50:34,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:50:34,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 6, 7] total 88 [2022-04-06 20:50:34,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:50:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1064630962] [2022-04-06 20:50:34,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1064630962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:50:34,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:50:34,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-04-06 20:50:34,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110553316] [2022-04-06 20:50:34,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:50:34,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-04-06 20:50:34,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:34,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-04-06 20:50:34,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=7387, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:50:34,290 INFO L87 Difference]: Start difference. First operand 240 states and 241 transitions. Second operand has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 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 20:50:42,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:50:42,523 INFO L93 Difference]: Finished difference Result 254 states and 257 transitions. [2022-04-06 20:50:42,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-04-06 20:50:42,523 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 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 20:50:42,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:50:42,524 INFO L225 Difference]: With dead ends: 254 [2022-04-06 20:50:42,524 INFO L226 Difference]: Without dead ends: 244 [2022-04-06 20:50:42,525 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 472 SyntacticMatches, 1 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=723, Invalid=26009, Unknown=0, NotChecked=0, Total=26732 [2022-04-06 20:50:42,525 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 237 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 17122 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 17275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 17122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-04-06 20:50:42,525 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 154 Invalid, 17275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 17122 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-04-06 20:50:42,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-04-06 20:50:42,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2022-04-06 20:50:42,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 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 20:50:42,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 244 transitions. [2022-04-06 20:50:42,596 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 244 transitions. Word has length 239 [2022-04-06 20:50:42,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:50:42,596 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 244 transitions. [2022-04-06 20:50:42,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.9746835443037973) internal successors, (235), 78 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 20:50:42,596 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 244 transitions. [2022-04-06 20:50:42,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-04-06 20:50:42,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:50:42,597 INFO L499 BasicCegarLoop]: trace histogram [77, 77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:50:42,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-04-06 20:50:42,798 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 20:50:42,798 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:50:42,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:50:42,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1688518986, now seen corresponding path program 151 times [2022-04-06 20:50:42,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:50:42,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [686431583] [2022-04-06 20:50:42,799 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:50:42,799 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:50:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1688518986, now seen corresponding path program 152 times [2022-04-06 20:50:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:50:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502012428] [2022-04-06 20:50:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:50:42,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:50:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:45,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:50:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:50:45,352 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 153 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:45,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:50:45,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502012428] [2022-04-06 20:50:45,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502012428] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:50:45,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213227401] [2022-04-06 20:50:45,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:50:45,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:50:45,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:50:45,353 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:50:45,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-04-06 20:50:45,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:50:45,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:50:45,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 163 conjunts are in the unsatisfiable core [2022-04-06 20:50:45,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:50:51,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 153 proven. 8702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:50:51,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:06,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8855 backedges. 0 proven. 8855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:06,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213227401] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:06,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:06,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80, 82] total 238 [2022-04-06 20:51:06,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:06,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [686431583] [2022-04-06 20:51:06,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [686431583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:06,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:06,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-04-06 20:51:06,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869406399] [2022-04-06 20:51:06,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:06,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-04-06 20:51:06,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:06,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-04-06 20:51:06,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12796, Invalid=43610, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:51:06,553 INFO L87 Difference]: Start difference. First operand 243 states and 244 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:14,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:14,969 INFO L93 Difference]: Finished difference Result 257 states and 260 transitions. [2022-04-06 20:51:14,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-04-06 20:51:14,970 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 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 242 [2022-04-06 20:51:14,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:14,971 INFO L225 Difference]: With dead ends: 257 [2022-04-06 20:51:14,971 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 20:51:14,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 329 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24340 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=19262, Invalid=79648, Unknown=0, NotChecked=0, Total=98910 [2022-04-06 20:51:14,974 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 240 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 17684 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 17839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 17684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:14,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 244 Invalid, 17839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 17684 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-04-06 20:51:14,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 20:51:15,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 246. [2022-04-06 20:51:15,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.008298755186722) internal successors, (243), 241 states have internal predecessors, (243), 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 20:51:15,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 247 transitions. [2022-04-06 20:51:15,060 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 247 transitions. Word has length 242 [2022-04-06 20:51:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:15,060 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 247 transitions. [2022-04-06 20:51:15,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 247 transitions. [2022-04-06 20:51:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-04-06 20:51:15,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:15,061 INFO L499 BasicCegarLoop]: trace histogram [78, 78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:15,078 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 20:51:15,261 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 20:51:15,262 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:15,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:15,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1286852450, now seen corresponding path program 153 times [2022-04-06 20:51:15,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:15,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1387089230] [2022-04-06 20:51:15,263 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:15,263 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:15,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1286852450, now seen corresponding path program 154 times [2022-04-06 20:51:15,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:15,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074066669] [2022-04-06 20:51:15,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:15,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:17,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:17,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 155 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:17,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074066669] [2022-04-06 20:51:17,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074066669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:17,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553631451] [2022-04-06 20:51:17,837 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:51:17,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:17,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:17,838 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:17,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-04-06 20:51:18,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:51:18,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 157 conjunts are in the unsatisfiable core [2022-04-06 20:51:18,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:18,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 155 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:18,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:27,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9087 backedges. 155 proven. 8932 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:27,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553631451] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:27,826 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:27,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 80, 80] total 160 [2022-04-06 20:51:27,826 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:27,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1387089230] [2022-04-06 20:51:27,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1387089230] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:27,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:27,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-04-06 20:51:27,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627428672] [2022-04-06 20:51:27,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:27,827 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-04-06 20:51:27,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:27,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-04-06 20:51:27,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=18883, Unknown=0, NotChecked=0, Total=25440 [2022-04-06 20:51:27,828 INFO L87 Difference]: Start difference. First operand 246 states and 247 transitions. Second operand has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:36,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:36,403 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2022-04-06 20:51:36,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-04-06 20:51:36,403 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 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 245 [2022-04-06 20:51:36,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:36,404 INFO L225 Difference]: With dead ends: 260 [2022-04-06 20:51:36,404 INFO L226 Difference]: Without dead ends: 250 [2022-04-06 20:51:36,406 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 413 SyntacticMatches, 2 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3163 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=13107, Invalid=43299, Unknown=0, NotChecked=0, Total=56406 [2022-04-06 20:51:36,406 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 18312 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 18469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 18312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:36,406 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 384 Invalid, 18469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 18312 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-04-06 20:51:36,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-04-06 20:51:36,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2022-04-06 20:51:36,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 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 20:51:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 250 transitions. [2022-04-06 20:51:36,481 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 250 transitions. Word has length 245 [2022-04-06 20:51:36,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:36,482 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 250 transitions. [2022-04-06 20:51:36,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.9753086419753085) internal successors, (241), 80 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 250 transitions. [2022-04-06 20:51:36,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-04-06 20:51:36,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:36,483 INFO L499 BasicCegarLoop]: trace histogram [79, 79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:36,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2022-04-06 20:51:36,700 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 20:51:36,700 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:36,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:36,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1017965130, now seen corresponding path program 155 times [2022-04-06 20:51:36,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:36,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [850731758] [2022-04-06 20:51:36,702 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:36,702 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1017965130, now seen corresponding path program 156 times [2022-04-06 20:51:36,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:36,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909174651] [2022-04-06 20:51:36,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:36,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:36,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 157 proven. 9165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:39,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:39,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909174651] [2022-04-06 20:51:39,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909174651] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:39,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167399485] [2022-04-06 20:51:39,437 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:51:39,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:39,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:39,439 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:39,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-04-06 20:51:39,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 20:51:39,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:39,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 20:51:39,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:51:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 388 proven. 2 refuted. 0 times theorem prover too weak. 8932 trivial. 0 not checked. [2022-04-06 20:51:40,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:51:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9322 backedges. 4055 proven. 390 refuted. 0 times theorem prover too weak. 4877 trivial. 0 not checked. [2022-04-06 20:51:41,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167399485] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:51:41,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:51:41,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 6, 7] total 91 [2022-04-06 20:51:41,141 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:51:41,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [850731758] [2022-04-06 20:51:41,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [850731758] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:51:41,141 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:51:41,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-04-06 20:51:41,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8767740] [2022-04-06 20:51:41,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:51:41,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-04-06 20:51:41,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:41,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-04-06 20:51:41,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=7912, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:51:41,143 INFO L87 Difference]: Start difference. First operand 249 states and 250 transitions. Second operand has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:50,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:51:50,020 INFO L93 Difference]: Finished difference Result 263 states and 266 transitions. [2022-04-06 20:51:50,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-04-06 20:51:50,020 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 states have internal predecessors, (244), 2 states have call successors, (3), 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 248 [2022-04-06 20:51:50,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:51:50,021 INFO L225 Difference]: With dead ends: 263 [2022-04-06 20:51:50,021 INFO L226 Difference]: Without dead ends: 253 [2022-04-06 20:51:50,023 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 659 GetRequests, 490 SyntacticMatches, 1 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3349 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=750, Invalid=27980, Unknown=0, NotChecked=0, Total=28730 [2022-04-06 20:51:50,023 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 246 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 18700 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 18859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 18700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-04-06 20:51:50,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 319 Invalid, 18859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 18700 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-04-06 20:51:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-04-06 20:51:50,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 252. [2022-04-06 20:51:50,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 247 states have (on average 1.008097165991903) internal successors, (249), 247 states have internal predecessors, (249), 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 20:51:50,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 253 transitions. [2022-04-06 20:51:50,113 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 253 transitions. Word has length 248 [2022-04-06 20:51:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:51:50,113 INFO L478 AbstractCegarLoop]: Abstraction has 252 states and 253 transitions. [2022-04-06 20:51:50,114 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.975609756097561) internal successors, (244), 81 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:51:50,114 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 253 transitions. [2022-04-06 20:51:50,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-04-06 20:51:50,114 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:51:50,115 INFO L499 BasicCegarLoop]: trace histogram [80, 80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:51:50,118 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-04-06 20:51:50,315 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 20:51:50,316 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:51:50,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:51:50,316 INFO L85 PathProgramCache]: Analyzing trace with hash 709822050, now seen corresponding path program 157 times [2022-04-06 20:51:50,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:51:50,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1479220015] [2022-04-06 20:51:50,317 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:51:50,317 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:51:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash 709822050, now seen corresponding path program 158 times [2022-04-06 20:51:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:51:50,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303446031] [2022-04-06 20:51:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:51:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:51:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:51:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:51:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 9560 backedges. 159 proven. 9401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:51:53,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:51:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303446031] [2022-04-06 20:51:53,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303446031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:51:53,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842473862] [2022-04-06 20:51:53,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:51:53,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:51:53,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:51:53,016 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:51:53,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-04-06 20:51:53,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:51:53,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:51:53,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 167 conjunts are in the unsatisfiable core [2022-04-06 20:51:53,284 INFO L286 TraceCheckSpWp]: Computing forward predicates...