/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 20:07:32,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 20:07:32,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 20:07:32,812 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 20:07:32,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 20:07:32,850 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 20:07:32,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 20:07:32,853 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 20:07:32,868 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 20:07:32,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 20:07:32,870 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 20:07:32,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 20:07:32,870 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 20:07:32,871 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 20:07:32,871 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 20:07:32,871 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 20:07:32,871 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 20:07:32,872 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 20:07:32,872 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 20:07:32,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 20:07:32,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 20:07:32,872 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 20:07:32,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 20:07:32,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:07:32,873 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 20:07:32,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 20:07:32,873 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 20:07:32,873 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 20:07:32,873 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 20:07:32,873 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 20:07:32,873 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 20:07:33,116 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 20:07:33,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 20:07:33,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 20:07:33,136 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 20:07:33,136 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 20:07:33,137 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2022-04-06 20:07:33,184 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62262bbe7/35309501361c4e9586f272ed752c4c0b/FLAGf8120f5b2 [2022-04-06 20:07:33,571 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 20:07:33,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2022-04-06 20:07:33,575 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62262bbe7/35309501361c4e9586f272ed752c4c0b/FLAGf8120f5b2 [2022-04-06 20:07:33,584 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62262bbe7/35309501361c4e9586f272ed752c4c0b [2022-04-06 20:07:33,586 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 20:07:33,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 20:07:33,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 20:07:33,589 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 20:07:33,595 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 20:07:33,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@534cab2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33, skipping insertion in model container [2022-04-06 20:07:33,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 20:07:33,614 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 20:07:33,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2022-04-06 20:07:33,759 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:07:33,765 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 20:07:33,773 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i[895,908] [2022-04-06 20:07:33,775 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 20:07:33,784 INFO L208 MainTranslator]: Completed translation [2022-04-06 20:07:33,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33 WrapperNode [2022-04-06 20:07:33,785 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 20:07:33,786 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 20:07:33,786 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 20:07:33,786 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 20:07:33,793 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,793 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,802 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,808 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 20:07:33,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 20:07:33,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 20:07:33,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 20:07:33,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (1/1) ... [2022-04-06 20:07:33,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 20:07:33,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:33,836 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 20:07:33,858 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 20:07:33,876 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 20:07:33,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 20:07:33,877 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 20:07:33,877 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 20:07:33,878 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 20:07:33,878 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 20:07:33,878 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 20:07:33,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 20:07:33,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-04-06 20:07:33,879 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-04-06 20:07:33,879 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 20:07:33,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 20:07:33,880 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 20:07:33,880 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 20:07:33,881 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 20:07:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 20:07:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 20:07:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 20:07:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 20:07:33,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 20:07:33,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 20:07:33,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 20:07:33,937 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 20:07:33,938 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 20:07:34,008 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 20:07:34,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 20:07:34,013 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 20:07:34,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:07:34 BoogieIcfgContainer [2022-04-06 20:07:34,015 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 20:07:34,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 20:07:34,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 20:07:34,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 20:07:34,019 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 08:07:33" (1/3) ... [2022-04-06 20:07:34,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c8ea3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:07:34, skipping insertion in model container [2022-04-06 20:07:34,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 08:07:33" (2/3) ... [2022-04-06 20:07:34,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@27c8ea3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 08:07:34, skipping insertion in model container [2022-04-06 20:07:34,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 08:07:34" (3/3) ... [2022-04-06 20:07:34,021 INFO L111 eAbstractionObserver]: Analyzing ICFG gr2006.i [2022-04-06 20:07:34,026 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 20:07:34,026 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 20:07:34,061 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 20:07:34,067 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 20:07:34,067 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 20:07:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 20:07:34,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-04-06 20:07:34,085 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:34,085 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:34,086 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:34,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:34,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1795296022, now seen corresponding path program 1 times [2022-04-06 20:07:34,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [391001267] [2022-04-06 20:07:34,107 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:34,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1795296022, now seen corresponding path program 2 times [2022-04-06 20:07:34,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:34,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782095945] [2022-04-06 20:07:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:34,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,266 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 20:07:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782095945] [2022-04-06 20:07:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782095945] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:07:34,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:34,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [391001267] [2022-04-06 20:07:34,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [391001267] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,270 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 20:07:34,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810407569] [2022-04-06 20:07:34,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:34,275 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 20:07:34,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 20:07:34,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 20:07:34,325 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 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 20:07:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:34,396 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2022-04-06 20:07:34,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 20:07:34,398 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 20:07:34,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:34,406 INFO L225 Difference]: With dead ends: 33 [2022-04-06 20:07:34,407 INFO L226 Difference]: Without dead ends: 14 [2022-04-06 20:07:34,409 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 20:07:34,412 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 20:07:34,413 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 20:07:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-04-06 20:07:34,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-04-06 20:07:34,450 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 20:07:34,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-04-06 20:07:34,452 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-04-06 20:07:34,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:34,452 INFO L478 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-04-06 20:07:34,453 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 20:07:34,453 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-04-06 20:07:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:07:34,454 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:34,454 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:34,454 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 20:07:34,455 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:34,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:34,457 INFO L85 PathProgramCache]: Analyzing trace with hash 1744532035, now seen corresponding path program 1 times [2022-04-06 20:07:34,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1961331410] [2022-04-06 20:07:34,460 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:34,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1744532035, now seen corresponding path program 2 times [2022-04-06 20:07:34,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:34,462 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447105062] [2022-04-06 20:07:34,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:34,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:34,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,555 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 20:07:34,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:34,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447105062] [2022-04-06 20:07:34,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447105062] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:07:34,556 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:34,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1961331410] [2022-04-06 20:07:34,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1961331410] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,556 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:07:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008518624] [2022-04-06 20:07:34,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:34,557 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:07:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:07:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 20:07:34,558 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:34,618 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2022-04-06 20:07:34,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:07:34,618 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 20:07:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:34,621 INFO L225 Difference]: With dead ends: 24 [2022-04-06 20:07:34,622 INFO L226 Difference]: Without dead ends: 19 [2022-04-06 20:07:34,625 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:07:34,631 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:34,634 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 25 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:34,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-04-06 20:07:34,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2022-04-06 20:07:34,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:34,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-04-06 20:07:34,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 13 [2022-04-06 20:07:34,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:34,641 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-04-06 20:07:34,641 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-04-06 20:07:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-04-06 20:07:34,642 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:34,642 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:34,642 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 20:07:34,642 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:34,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:34,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1801790337, now seen corresponding path program 1 times [2022-04-06 20:07:34,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1919298990] [2022-04-06 20:07:34,643 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 20:07:34,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1801790337, now seen corresponding path program 2 times [2022-04-06 20:07:34,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:34,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998323378] [2022-04-06 20:07:34,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:34,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:34,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,685 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 20:07:34,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998323378] [2022-04-06 20:07:34,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998323378] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,686 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:07:34,686 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:34,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1919298990] [2022-04-06 20:07:34,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1919298990] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,687 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-04-06 20:07:34,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135290980] [2022-04-06 20:07:34,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:34,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-04-06 20:07:34,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-04-06 20:07:34,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-04-06 20:07:34,688 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:34,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:34,714 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-04-06 20:07:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-04-06 20:07:34,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-04-06 20:07:34,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:34,715 INFO L225 Difference]: With dead ends: 28 [2022-04-06 20:07:34,715 INFO L226 Difference]: Without dead ends: 20 [2022-04-06 20:07:34,716 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 20:07:34,717 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:34,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 20 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:34,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-04-06 20:07:34,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-04-06 20:07:34,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:34,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-04-06 20:07:34,723 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2022-04-06 20:07:34,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:34,723 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-04-06 20:07:34,723 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:34,723 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-04-06 20:07:34,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-04-06 20:07:34,724 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:34,724 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:34,724 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 20:07:34,724 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:34,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:34,725 INFO L85 PathProgramCache]: Analyzing trace with hash 799073317, now seen corresponding path program 1 times [2022-04-06 20:07:34,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1206259415] [2022-04-06 20:07:34,738 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:34,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:34,738 INFO L85 PathProgramCache]: Analyzing trace with hash 799073317, now seen corresponding path program 2 times [2022-04-06 20:07:34,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362907621] [2022-04-06 20:07:34,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:34,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:34,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:34,779 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:34,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:34,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362907621] [2022-04-06 20:07:34,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362907621] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:34,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954034732] [2022-04-06 20:07:34,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:34,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:34,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:34,782 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 20:07:34,813 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 20:07:34,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:34,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:34,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:34,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:34,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:34,995 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:34,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954034732] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:34,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:34,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 7 [2022-04-06 20:07:34,996 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:34,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1206259415] [2022-04-06 20:07:34,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1206259415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:34,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:34,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:07:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50757756] [2022-04-06 20:07:34,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:34,998 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:07:34,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:34,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:07:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 20:07:35,000 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:35,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:35,061 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-04-06 20:07:35,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:07:35,061 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-04-06 20:07:35,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:35,063 INFO L225 Difference]: With dead ends: 31 [2022-04-06 20:07:35,063 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 20:07:35,064 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:07:35,068 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:35,069 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:35,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 20:07:35,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-04-06 20:07:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-04-06 20:07:35,074 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2022-04-06 20:07:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:35,074 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-04-06 20:07:35,074 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-04-06 20:07:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-04-06 20:07:35,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:35,081 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:35,114 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 20:07:35,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:35,292 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:35,292 INFO L85 PathProgramCache]: Analyzing trace with hash 353874177, now seen corresponding path program 3 times [2022-04-06 20:07:35,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:35,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1835446107] [2022-04-06 20:07:35,294 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:35,294 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:35,294 INFO L85 PathProgramCache]: Analyzing trace with hash 353874177, now seen corresponding path program 4 times [2022-04-06 20:07:35,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:35,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450819464] [2022-04-06 20:07:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:35,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:35,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:35,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:35,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:35,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450819464] [2022-04-06 20:07:35,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450819464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:35,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91103252] [2022-04-06 20:07:35,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:35,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:35,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:35,419 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 20:07:35,457 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 20:07:35,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:35,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:35,529 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:35,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:35,601 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:35,601 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91103252] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:35,601 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:35,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 20:07:35,602 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:35,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1835446107] [2022-04-06 20:07:35,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1835446107] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:35,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:35,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:07:35,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684227223] [2022-04-06 20:07:35,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:35,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:07:35,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:07:35,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:07:35,605 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:35,675 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-06 20:07:35,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:07:35,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-04-06 20:07:35,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:35,677 INFO L225 Difference]: With dead ends: 34 [2022-04-06 20:07:35,677 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 20:07:35,678 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2022-04-06 20:07:35,679 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:35,679 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 25 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 20:07:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-04-06 20:07:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-04-06 20:07:35,693 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 19 [2022-04-06 20:07:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:35,693 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-04-06 20:07:35,693 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-04-06 20:07:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 20:07:35,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:35,694 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:35,716 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 20:07:35,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:35,900 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:35,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:35,900 INFO L85 PathProgramCache]: Analyzing trace with hash 285304485, now seen corresponding path program 5 times [2022-04-06 20:07:35,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:35,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1430124909] [2022-04-06 20:07:35,902 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:35,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:35,902 INFO L85 PathProgramCache]: Analyzing trace with hash 285304485, now seen corresponding path program 6 times [2022-04-06 20:07:35,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:35,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878159159] [2022-04-06 20:07:35,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:35,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:35,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:35,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:35,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878159159] [2022-04-06 20:07:35,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878159159] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:35,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438280946] [2022-04-06 20:07:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:35,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:35,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:35,965 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 20:07:35,966 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 20:07:36,002 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 20:07:36,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:36,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 20:07:36,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:36,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:36,121 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:36,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438280946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:36,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:36,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2022-04-06 20:07:36,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:36,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1430124909] [2022-04-06 20:07:36,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1430124909] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:36,123 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:36,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:07:36,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142788057] [2022-04-06 20:07:36,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:36,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:07:36,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:36,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:07:36,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-04-06 20:07:36,124 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:36,193 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-04-06 20:07:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:07:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 20:07:36,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:36,194 INFO L225 Difference]: With dead ends: 37 [2022-04-06 20:07:36,194 INFO L226 Difference]: Without dead ends: 29 [2022-04-06 20:07:36,195 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:07:36,195 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 21 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:36,196 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 25 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:36,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-04-06 20:07:36,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-04-06 20:07:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-04-06 20:07:36,201 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 22 [2022-04-06 20:07:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:36,201 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-04-06 20:07:36,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,201 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-04-06 20:07:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-04-06 20:07:36,202 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:36,202 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:36,225 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 20:07:36,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:36,416 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:36,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1930043009, now seen corresponding path program 7 times [2022-04-06 20:07:36,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:36,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [282041746] [2022-04-06 20:07:36,418 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:36,418 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:36,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1930043009, now seen corresponding path program 8 times [2022-04-06 20:07:36,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:36,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717969003] [2022-04-06 20:07:36,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:36,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:36,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:36,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:36,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717969003] [2022-04-06 20:07:36,474 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717969003] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:36,474 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076449931] [2022-04-06 20:07:36,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:36,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:36,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:36,475 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 20:07:36,477 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 20:07:36,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:36,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:36,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:07:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:36,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-04-06 20:07:36,612 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076449931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:36,612 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:36,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 4, 4] total 10 [2022-04-06 20:07:36,612 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [282041746] [2022-04-06 20:07:36,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [282041746] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:36,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:36,613 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:07:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089818854] [2022-04-06 20:07:36,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:36,613 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:07:36,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:07:36,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 20:07:36,614 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:36,689 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-04-06 20:07:36,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:07:36,690 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-04-06 20:07:36,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:36,691 INFO L225 Difference]: With dead ends: 40 [2022-04-06 20:07:36,691 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 20:07:36,692 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:07:36,693 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:36,693 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 25 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:36,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 20:07:36,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-04-06 20:07:36,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-04-06 20:07:36,701 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 25 [2022-04-06 20:07:36,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:36,701 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-04-06 20:07:36,702 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:36,702 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-04-06 20:07:36,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 20:07:36,703 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:36,703 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:36,727 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 20:07:36,919 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:36,919 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:36,920 INFO L85 PathProgramCache]: Analyzing trace with hash -946468571, now seen corresponding path program 9 times [2022-04-06 20:07:36,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:36,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [874191556] [2022-04-06 20:07:36,921 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:36,921 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:36,922 INFO L85 PathProgramCache]: Analyzing trace with hash -946468571, now seen corresponding path program 10 times [2022-04-06 20:07:36,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:36,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881815597] [2022-04-06 20:07:36,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:36,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:36,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:36,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:36,993 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:36,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:36,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881815597] [2022-04-06 20:07:36,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881815597] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:36,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150641068] [2022-04-06 20:07:36,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:36,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:36,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:36,995 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 20:07:37,023 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 20:07:37,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:37,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 20:07:37,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:37,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:37,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150641068] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:37,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:37,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 20:07:37,221 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:37,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [874191556] [2022-04-06 20:07:37,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [874191556] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:37,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:37,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:07:37,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372962501] [2022-04-06 20:07:37,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:37,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:07:37,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:37,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:07:37,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-04-06 20:07:37,224 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:37,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:37,302 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-04-06 20:07:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:07:37,303 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-04-06 20:07:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:37,304 INFO L225 Difference]: With dead ends: 43 [2022-04-06 20:07:37,305 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 20:07:37,305 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=264, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:07:37,306 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:37,306 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 25 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:37,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 20:07:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-04-06 20:07:37,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-04-06 20:07:37,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 28 [2022-04-06 20:07:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:37,317 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-04-06 20:07:37,317 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:37,318 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-04-06 20:07:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 20:07:37,318 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:37,318 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:37,343 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 20:07:37,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:37,544 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:37,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:37,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1915458559, now seen corresponding path program 11 times [2022-04-06 20:07:37,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:37,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1498270374] [2022-04-06 20:07:37,545 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:37,545 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:37,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1915458559, now seen corresponding path program 12 times [2022-04-06 20:07:37,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262257571] [2022-04-06 20:07:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:37,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:37,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:37,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262257571] [2022-04-06 20:07:37,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262257571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:37,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275047897] [2022-04-06 20:07:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:37,625 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:37,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:37,627 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 20:07:37,659 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 20:07:37,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:37,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:37,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:37,729 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:07:37,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 20:07:37,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275047897] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:37,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 12 [2022-04-06 20:07:37,782 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:37,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1498270374] [2022-04-06 20:07:37,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1498270374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:37,782 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:37,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:07:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16137732] [2022-04-06 20:07:37,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:37,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:07:37,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:07:37,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:07:37,783 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:37,901 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-04-06 20:07:37,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:07:37,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-04-06 20:07:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:37,902 INFO L225 Difference]: With dead ends: 46 [2022-04-06 20:07:37,902 INFO L226 Difference]: Without dead ends: 38 [2022-04-06 20:07:37,903 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2022-04-06 20:07:37,905 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 30 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:37,905 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 30 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:37,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-04-06 20:07:37,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-04-06 20:07:37,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-04-06 20:07:37,918 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 31 [2022-04-06 20:07:37,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:37,919 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-04-06 20:07:37,919 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:37,919 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-04-06 20:07:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 20:07:37,921 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:37,922 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:37,944 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 20:07:38,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:38,144 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:38,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:38,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1673972645, now seen corresponding path program 13 times [2022-04-06 20:07:38,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:38,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [199555384] [2022-04-06 20:07:38,146 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:38,146 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1673972645, now seen corresponding path program 14 times [2022-04-06 20:07:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:38,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736322115] [2022-04-06 20:07:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:38,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:38,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 7 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:38,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:38,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736322115] [2022-04-06 20:07:38,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736322115] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:38,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736253859] [2022-04-06 20:07:38,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:38,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:38,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:38,245 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 20:07:38,268 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 20:07:38,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:38,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:38,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:07:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:38,444 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:38,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 82 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:38,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736253859] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:38,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:38,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-04-06 20:07:38,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:38,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [199555384] [2022-04-06 20:07:38,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [199555384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:38,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:38,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:07:38,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913977615] [2022-04-06 20:07:38,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:38,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:07:38,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:38,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:07:38,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=434, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:07:38,606 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:38,758 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-04-06 20:07:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:07:38,759 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-04-06 20:07:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:38,759 INFO L225 Difference]: With dead ends: 49 [2022-04-06 20:07:38,759 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 20:07:38,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:07:38,761 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:38,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 40 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 20:07:38,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-04-06 20:07:38,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-04-06 20:07:38,768 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 34 [2022-04-06 20:07:38,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:38,768 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-04-06 20:07:38,768 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:38,768 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-04-06 20:07:38,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 20:07:38,769 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:38,769 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:38,793 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 20:07:38,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:38,970 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:38,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:38,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1676764799, now seen corresponding path program 15 times [2022-04-06 20:07:38,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:38,970 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1371673334] [2022-04-06 20:07:38,971 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:38,971 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:38,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1676764799, now seen corresponding path program 16 times [2022-04-06 20:07:38,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:38,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740540333] [2022-04-06 20:07:38,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:38,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:38,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:39,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740540333] [2022-04-06 20:07:39,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740540333] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:39,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213596604] [2022-04-06 20:07:39,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:39,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:39,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:39,064 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 20:07:39,066 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 20:07:39,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:39,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:39,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 20:07:39,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 8 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213596604] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:39,352 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:39,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 20:07:39,352 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:39,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1371673334] [2022-04-06 20:07:39,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1371673334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:39,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:39,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:07:39,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279766916] [2022-04-06 20:07:39,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:39,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:07:39,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:39,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:07:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-04-06 20:07:39,354 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:39,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:39,488 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-04-06 20:07:39,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:07:39,489 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 20:07:39,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:39,489 INFO L225 Difference]: With dead ends: 52 [2022-04-06 20:07:39,490 INFO L226 Difference]: Without dead ends: 44 [2022-04-06 20:07:39,490 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=402, Invalid=528, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:07:39,491 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:39,491 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 35 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:39,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-04-06 20:07:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-04-06 20:07:39,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:39,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-04-06 20:07:39,497 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 37 [2022-04-06 20:07:39,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:39,497 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-04-06 20:07:39,497 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-04-06 20:07:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-04-06 20:07:39,498 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:39,498 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:39,522 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 20:07:39,717 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 20:07:39,718 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:39,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:39,718 INFO L85 PathProgramCache]: Analyzing trace with hash 133934629, now seen corresponding path program 17 times [2022-04-06 20:07:39,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:39,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1840090136] [2022-04-06 20:07:39,720 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:39,720 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:39,721 INFO L85 PathProgramCache]: Analyzing trace with hash 133934629, now seen corresponding path program 18 times [2022-04-06 20:07:39,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:39,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102386078] [2022-04-06 20:07:39,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:39,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:39,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:39,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:39,817 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 9 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:39,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102386078] [2022-04-06 20:07:39,817 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102386078] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:39,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371023497] [2022-04-06 20:07:39,817 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:39,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:39,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:39,818 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 20:07:39,819 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 20:07:39,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:39,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:39,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:39,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:07:39,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:39,985 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 20:07:39,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371023497] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:39,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:39,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 15 [2022-04-06 20:07:39,986 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:39,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1840090136] [2022-04-06 20:07:39,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1840090136] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:39,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:39,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:07:39,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534231831] [2022-04-06 20:07:39,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:39,987 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:07:39,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:39,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:07:39,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:07:39,988 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:40,152 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-04-06 20:07:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:07:40,153 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-04-06 20:07:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:40,154 INFO L225 Difference]: With dead ends: 55 [2022-04-06 20:07:40,154 INFO L226 Difference]: Without dead ends: 47 [2022-04-06 20:07:40,154 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2022-04-06 20:07:40,155 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:40,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 30 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-04-06 20:07:40,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-04-06 20:07:40,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-04-06 20:07:40,162 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 40 [2022-04-06 20:07:40,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:40,163 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-04-06 20:07:40,163 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:40,163 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-04-06 20:07:40,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 20:07:40,164 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:40,164 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:40,187 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 20:07:40,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:40,379 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:40,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:40,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2108643583, now seen corresponding path program 19 times [2022-04-06 20:07:40,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:40,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1130597467] [2022-04-06 20:07:40,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:40,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:40,382 INFO L85 PathProgramCache]: Analyzing trace with hash -2108643583, now seen corresponding path program 20 times [2022-04-06 20:07:40,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:40,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580932637] [2022-04-06 20:07:40,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:40,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:40,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:40,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:40,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 10 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:40,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:40,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580932637] [2022-04-06 20:07:40,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580932637] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:40,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597913851] [2022-04-06 20:07:40,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:40,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:40,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:40,517 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:07:40,522 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 20:07:40,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:40,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:40,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:07:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:40,743 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:40,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:40,928 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 163 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:40,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597913851] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:40,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:40,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 34 [2022-04-06 20:07:40,928 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:40,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1130597467] [2022-04-06 20:07:40,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1130597467] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:40,929 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:40,929 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:07:40,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019272622] [2022-04-06 20:07:40,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:40,929 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:07:40,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:40,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:07:40,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=812, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:07:40,930 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:41,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:41,164 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-04-06 20:07:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:07:41,164 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-04-06 20:07:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:41,165 INFO L225 Difference]: With dead ends: 58 [2022-04-06 20:07:41,165 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 20:07:41,166 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 575 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=464, Invalid=1516, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:07:41,166 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 42 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:41,166 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 30 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:41,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 20:07:41,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 20:07:41,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 44 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:41,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-04-06 20:07:41,174 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 43 [2022-04-06 20:07:41,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:41,175 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-04-06 20:07:41,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:41,175 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-04-06 20:07:41,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-04-06 20:07:41,175 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:41,176 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:41,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:41,398 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 20:07:41,399 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:41,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1755099301, now seen corresponding path program 21 times [2022-04-06 20:07:41,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:41,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [509496102] [2022-04-06 20:07:41,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:41,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:41,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1755099301, now seen corresponding path program 22 times [2022-04-06 20:07:41,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:41,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868785614] [2022-04-06 20:07:41,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:41,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:41,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:41,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:41,517 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:41,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868785614] [2022-04-06 20:07:41,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868785614] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:41,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42080294] [2022-04-06 20:07:41,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:41,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:41,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:41,519 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 20:07:41,550 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 20:07:41,563 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:41,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 20:07:41,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:41,652 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:41,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:41,914 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 11 proven. 187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:41,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42080294] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:41,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:41,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 28 [2022-04-06 20:07:41,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:41,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [509496102] [2022-04-06 20:07:41,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [509496102] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:41,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:41,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:07:41,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250200235] [2022-04-06 20:07:41,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:41,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:07:41,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:41,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:07:41,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-04-06 20:07:41,917 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:42,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:42,074 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-04-06 20:07:42,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:07:42,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-04-06 20:07:42,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:42,075 INFO L225 Difference]: With dead ends: 61 [2022-04-06 20:07:42,075 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 20:07:42,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=678, Invalid=882, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:07:42,077 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 45 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:42,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 35 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:42,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 20:07:42,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 20:07:42,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-04-06 20:07:42,083 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 46 [2022-04-06 20:07:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:42,083 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-04-06 20:07:42,083 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 14 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-04-06 20:07:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 20:07:42,084 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:42,084 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:42,109 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 20:07:42,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 20:07:42,300 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:42,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:42,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1395823745, now seen corresponding path program 23 times [2022-04-06 20:07:42,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:42,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [149786161] [2022-04-06 20:07:42,301 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:42,301 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:42,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1395823745, now seen corresponding path program 24 times [2022-04-06 20:07:42,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:42,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230732140] [2022-04-06 20:07:42,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:42,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:42,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:42,424 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 12 proven. 222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:42,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230732140] [2022-04-06 20:07:42,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230732140] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:42,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835834158] [2022-04-06 20:07:42,424 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:42,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:42,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:42,425 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 20:07:42,451 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 20:07:42,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:42,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:42,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:42,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:42,557 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 20:07:42,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:42,626 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 68 proven. 1 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-04-06 20:07:42,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835834158] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:42,626 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:42,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 4, 4] total 18 [2022-04-06 20:07:42,626 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [149786161] [2022-04-06 20:07:42,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [149786161] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:42,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:42,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:07:42,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595971565] [2022-04-06 20:07:42,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:42,627 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:07:42,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:42,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:07:42,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:07:42,628 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:42,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:42,801 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-04-06 20:07:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:07:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-04-06 20:07:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:42,802 INFO L225 Difference]: With dead ends: 64 [2022-04-06 20:07:42,802 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 20:07:42,802 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=320, Invalid=610, Unknown=0, NotChecked=0, Total=930 [2022-04-06 20:07:42,803 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:42,803 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 30 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:07:42,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 20:07:42,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-04-06 20:07:42,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.06) internal successors, (53), 50 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:42,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-04-06 20:07:42,809 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 49 [2022-04-06 20:07:42,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:42,810 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-04-06 20:07:42,810 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:42,810 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-04-06 20:07:42,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 20:07:42,810 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:42,810 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:42,828 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 20:07:43,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 20:07:43,019 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:43,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:43,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1276236581, now seen corresponding path program 25 times [2022-04-06 20:07:43,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:43,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907244293] [2022-04-06 20:07:43,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:43,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:43,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1276236581, now seen corresponding path program 26 times [2022-04-06 20:07:43,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:43,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12833285] [2022-04-06 20:07:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:43,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:43,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 13 proven. 260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:43,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:43,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12833285] [2022-04-06 20:07:43,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12833285] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:43,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505131848] [2022-04-06 20:07:43,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:43,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:43,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:43,148 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 20:07:43,176 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 20:07:43,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:43,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:07:43,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:43,484 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 271 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:43,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 271 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:43,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505131848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:43,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:43,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 43 [2022-04-06 20:07:43,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:43,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907244293] [2022-04-06 20:07:43,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907244293] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:43,733 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:43,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:07:43,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956740454] [2022-04-06 20:07:43,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:43,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:07:43,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:43,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:07:43,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=499, Invalid=1307, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:07:43,734 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:43,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:43,993 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-04-06 20:07:43,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:07:43,993 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 20:07:43,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:43,994 INFO L225 Difference]: With dead ends: 67 [2022-04-06 20:07:43,994 INFO L226 Difference]: Without dead ends: 59 [2022-04-06 20:07:43,995 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 962 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:07:43,995 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 51 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:43,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 30 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:43,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-04-06 20:07:44,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-04-06 20:07:44,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:44,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-04-06 20:07:44,002 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 52 [2022-04-06 20:07:44,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:44,002 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-04-06 20:07:44,002 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:44,002 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-04-06 20:07:44,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-04-06 20:07:44,003 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:44,003 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:44,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 20:07:44,211 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 20:07:44,211 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:44,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:44,212 INFO L85 PathProgramCache]: Analyzing trace with hash -817077759, now seen corresponding path program 27 times [2022-04-06 20:07:44,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:44,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [437283362] [2022-04-06 20:07:44,213 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:44,213 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:44,213 INFO L85 PathProgramCache]: Analyzing trace with hash -817077759, now seen corresponding path program 28 times [2022-04-06 20:07:44,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:44,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143651496] [2022-04-06 20:07:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:44,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:44,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:44,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:44,366 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 14 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:44,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:44,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143651496] [2022-04-06 20:07:44,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143651496] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:44,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168949701] [2022-04-06 20:07:44,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:44,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:44,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:44,368 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 20:07:44,369 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 20:07:44,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:44,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:44,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 20:07:44,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:44,501 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 14 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:44,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 14 proven. 301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:44,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168949701] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:44,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:44,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 34 [2022-04-06 20:07:44,841 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:44,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [437283362] [2022-04-06 20:07:44,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [437283362] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:44,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:44,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:07:44,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698672635] [2022-04-06 20:07:44,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:44,842 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:07:44,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:44,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:07:44,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 20:07:44,843 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:45,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:45,084 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-04-06 20:07:45,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:07:45,085 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-04-06 20:07:45,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:45,085 INFO L225 Difference]: With dead ends: 70 [2022-04-06 20:07:45,085 INFO L226 Difference]: Without dead ends: 62 [2022-04-06 20:07:45,086 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1026, Invalid=1326, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:07:45,087 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:45,087 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 40 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:45,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-04-06 20:07:45,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-04-06 20:07:45,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 56 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:45,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-04-06 20:07:45,096 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 55 [2022-04-06 20:07:45,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:45,096 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-04-06 20:07:45,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:45,097 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-04-06 20:07:45,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 20:07:45,098 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:45,098 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:45,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:45,301 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:45,301 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:45,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:45,302 INFO L85 PathProgramCache]: Analyzing trace with hash 180557221, now seen corresponding path program 29 times [2022-04-06 20:07:45,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:45,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1998371190] [2022-04-06 20:07:45,303 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:45,303 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:45,303 INFO L85 PathProgramCache]: Analyzing trace with hash 180557221, now seen corresponding path program 30 times [2022-04-06 20:07:45,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:45,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755136397] [2022-04-06 20:07:45,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:45,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:45,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:45,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:45,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755136397] [2022-04-06 20:07:45,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755136397] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:45,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948010896] [2022-04-06 20:07:45,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:45,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:45,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:45,462 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 20:07:45,466 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 20:07:45,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:45,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-04-06 20:07:45,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:45,648 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 86 proven. 1 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-04-06 20:07:45,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948010896] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:45,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:45,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4, 4] total 21 [2022-04-06 20:07:45,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:45,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1998371190] [2022-04-06 20:07:45,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1998371190] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:45,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:45,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:07:45,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050204886] [2022-04-06 20:07:45,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:45,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:07:45,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:45,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:07:45,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:07:45,650 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:45,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:45,880 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-04-06 20:07:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:07:45,880 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-04-06 20:07:45,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:45,881 INFO L225 Difference]: With dead ends: 73 [2022-04-06 20:07:45,881 INFO L226 Difference]: Without dead ends: 65 [2022-04-06 20:07:45,882 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=464, Invalid=868, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 20:07:45,882 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 57 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:45,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 25 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:45,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-04-06 20:07:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-04-06 20:07:45,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:45,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-04-06 20:07:45,889 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 58 [2022-04-06 20:07:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:45,890 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-04-06 20:07:45,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:45,890 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-04-06 20:07:45,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 20:07:45,890 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:45,890 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:45,915 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:46,091 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 20:07:46,091 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:46,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:46,092 INFO L85 PathProgramCache]: Analyzing trace with hash -449441919, now seen corresponding path program 31 times [2022-04-06 20:07:46,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:46,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1347413675] [2022-04-06 20:07:46,093 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:46,093 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:46,093 INFO L85 PathProgramCache]: Analyzing trace with hash -449441919, now seen corresponding path program 32 times [2022-04-06 20:07:46,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:46,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762337883] [2022-04-06 20:07:46,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:46,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:46,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:46,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:46,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 16 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:46,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:46,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762337883] [2022-04-06 20:07:46,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762337883] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:46,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102654207] [2022-04-06 20:07:46,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:46,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:46,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:46,267 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 20:07:46,278 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 20:07:46,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:46,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:46,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:07:46,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 406 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:46,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:46,949 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 406 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:46,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102654207] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:46,949 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:46,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 52 [2022-04-06 20:07:46,950 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:46,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1347413675] [2022-04-06 20:07:46,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1347413675] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:46,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:46,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:07:46,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104249305] [2022-04-06 20:07:46,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:46,950 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:07:46,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:46,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:07:46,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=733, Invalid=1919, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:07:46,952 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:47,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:47,340 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-04-06 20:07:47,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:07:47,340 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-04-06 20:07:47,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:47,341 INFO L225 Difference]: With dead ends: 76 [2022-04-06 20:07:47,341 INFO L226 Difference]: Without dead ends: 68 [2022-04-06 20:07:47,342 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1073, Invalid=3619, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:07:47,343 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:47,343 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 40 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-04-06 20:07:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-04-06 20:07:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-04-06 20:07:47,350 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2022-04-06 20:07:47,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:47,351 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-04-06 20:07:47,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 19 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:47,351 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-04-06 20:07:47,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 20:07:47,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:47,351 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:47,378 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 20:07:47,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:47,576 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:47,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:47,576 INFO L85 PathProgramCache]: Analyzing trace with hash 253261861, now seen corresponding path program 33 times [2022-04-06 20:07:47,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:47,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975980514] [2022-04-06 20:07:47,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:47,577 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 253261861, now seen corresponding path program 34 times [2022-04-06 20:07:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:47,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324015281] [2022-04-06 20:07:47,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:47,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:47,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:47,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 17 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:47,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:47,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324015281] [2022-04-06 20:07:47,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324015281] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:47,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514008140] [2022-04-06 20:07:47,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:47,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:47,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:47,762 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 20:07:47,762 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 20:07:47,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:47,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:47,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 20:07:47,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:47,900 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 17 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:47,901 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:48,373 INFO L134 CoverageAnalysis]: Checked inductivity of 459 backedges. 17 proven. 442 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:48,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514008140] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:48,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:48,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 40 [2022-04-06 20:07:48,374 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:48,374 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975980514] [2022-04-06 20:07:48,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975980514] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:48,374 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:48,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:07:48,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177785036] [2022-04-06 20:07:48,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:48,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:07:48,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:48,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:07:48,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 20:07:48,376 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:48,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:48,648 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-04-06 20:07:48,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:07:48,649 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2022-04-06 20:07:48,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:48,649 INFO L225 Difference]: With dead ends: 79 [2022-04-06 20:07:48,650 INFO L226 Difference]: Without dead ends: 71 [2022-04-06 20:07:48,651 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1446, Invalid=1860, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:07:48,651 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:48,651 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 20 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:48,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-04-06 20:07:48,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-04-06 20:07:48,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:48,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-04-06 20:07:48,659 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 64 [2022-04-06 20:07:48,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:48,659 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-04-06 20:07:48,659 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 20 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:48,659 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-04-06 20:07:48,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-04-06 20:07:48,660 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:48,660 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:48,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 20:07:48,860 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:48,861 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:48,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash 830971137, now seen corresponding path program 35 times [2022-04-06 20:07:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:48,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [101222795] [2022-04-06 20:07:48,862 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:48,862 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:48,862 INFO L85 PathProgramCache]: Analyzing trace with hash 830971137, now seen corresponding path program 36 times [2022-04-06 20:07:48,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:48,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946894625] [2022-04-06 20:07:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:48,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:49,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:49,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 18 proven. 495 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:49,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:49,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946894625] [2022-04-06 20:07:49,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946894625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:49,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033759427] [2022-04-06 20:07:49,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:49,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:49,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:49,093 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 20:07:49,095 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 20:07:49,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:49,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:49,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:49,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:49,270 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-04-06 20:07:49,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 513 backedges. 104 proven. 1 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2022-04-06 20:07:49,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033759427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:49,348 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:49,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 4, 4] total 24 [2022-04-06 20:07:49,348 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:49,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [101222795] [2022-04-06 20:07:49,348 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [101222795] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:49,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:49,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:07:49,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874219410] [2022-04-06 20:07:49,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:49,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:07:49,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:49,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:07:49,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2022-04-06 20:07:49,350 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:49,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:49,653 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-04-06 20:07:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:07:49,654 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-04-06 20:07:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:49,654 INFO L225 Difference]: With dead ends: 82 [2022-04-06 20:07:49,654 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 20:07:49,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 132 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=635, Invalid=1171, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 20:07:49,656 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:49,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 40 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:49,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 20:07:49,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-04-06 20:07:49,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 68 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-04-06 20:07:49,664 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 67 [2022-04-06 20:07:49,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:49,665 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-04-06 20:07:49,665 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 21 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:49,665 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-04-06 20:07:49,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-04-06 20:07:49,665 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:49,665 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:49,688 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 20:07:49,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:49,887 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:49,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:49,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1434057381, now seen corresponding path program 37 times [2022-04-06 20:07:49,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:49,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1938632075] [2022-04-06 20:07:49,889 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:49,889 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:49,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1434057381, now seen corresponding path program 38 times [2022-04-06 20:07:49,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:49,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297354011] [2022-04-06 20:07:49,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:49,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:49,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:50,094 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 19 proven. 551 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:50,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297354011] [2022-04-06 20:07:50,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297354011] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:50,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322820382] [2022-04-06 20:07:50,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:50,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:50,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:50,096 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 20:07:50,097 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 20:07:50,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:50,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:50,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:07:50,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:50,532 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 568 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:50,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:50,935 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 568 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:50,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322820382] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:50,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:50,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 61 [2022-04-06 20:07:50,936 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:50,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1938632075] [2022-04-06 20:07:50,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1938632075] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:50,937 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:50,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:07:50,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356571588] [2022-04-06 20:07:50,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:50,938 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:07:50,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:50,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:07:50,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1012, Invalid=2648, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:07:50,940 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:51,358 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-04-06 20:07:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:07:51,359 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-04-06 20:07:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:51,360 INFO L225 Difference]: With dead ends: 85 [2022-04-06 20:07:51,360 INFO L226 Difference]: Without dead ends: 77 [2022-04-06 20:07:51,362 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2033 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1472, Invalid=5008, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:07:51,362 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 69 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:51,362 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 35 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:51,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-04-06 20:07:51,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-04-06 20:07:51,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-04-06 20:07:51,370 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 70 [2022-04-06 20:07:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:51,370 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-04-06 20:07:51,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 22 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:51,370 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-04-06 20:07:51,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-04-06 20:07:51,370 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:51,371 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:51,387 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 20:07:51,575 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:51,575 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:51,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:51,576 INFO L85 PathProgramCache]: Analyzing trace with hash 2128153217, now seen corresponding path program 39 times [2022-04-06 20:07:51,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:51,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [738282615] [2022-04-06 20:07:51,577 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:51,577 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:51,577 INFO L85 PathProgramCache]: Analyzing trace with hash 2128153217, now seen corresponding path program 40 times [2022-04-06 20:07:51,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:51,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254139427] [2022-04-06 20:07:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:51,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:51,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:51,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:51,780 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 20 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:51,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254139427] [2022-04-06 20:07:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254139427] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468997660] [2022-04-06 20:07:51,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:51,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:51,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:51,781 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 20:07:51,784 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 20:07:51,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:51,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:51,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 20:07:51,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 20 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:51,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 20 proven. 610 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:52,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468997660] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:52,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:52,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 46 [2022-04-06 20:07:52,466 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:52,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [738282615] [2022-04-06 20:07:52,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [738282615] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:52,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:52,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:07:52,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153829972] [2022-04-06 20:07:52,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:52,467 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:07:52,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:52,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:07:52,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 20:07:52,468 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:52,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:52,777 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-04-06 20:07:52,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:07:52,778 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-04-06 20:07:52,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:52,779 INFO L225 Difference]: With dead ends: 88 [2022-04-06 20:07:52,779 INFO L226 Difference]: Without dead ends: 80 [2022-04-06 20:07:52,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1938, Invalid=2484, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:07:52,780 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:52,780 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 35 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:52,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-04-06 20:07:52,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-04-06 20:07:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 74 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:52,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-04-06 20:07:52,787 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2022-04-06 20:07:52,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:52,787 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-04-06 20:07:52,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.875) internal successors, (69), 23 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:52,787 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-04-06 20:07:52,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 20:07:52,788 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:52,788 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:52,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 20:07:53,003 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 20:07:53,003 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:53,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:53,004 INFO L85 PathProgramCache]: Analyzing trace with hash -330326747, now seen corresponding path program 41 times [2022-04-06 20:07:53,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:53,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1009066158] [2022-04-06 20:07:53,005 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:53,005 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:53,005 INFO L85 PathProgramCache]: Analyzing trace with hash -330326747, now seen corresponding path program 42 times [2022-04-06 20:07:53,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:53,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021627487] [2022-04-06 20:07:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:53,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:53,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:53,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:53,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 21 proven. 672 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021627487] [2022-04-06 20:07:53,232 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021627487] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:53,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572686148] [2022-04-06 20:07:53,233 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:53,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:53,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:53,235 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 20:07:53,236 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 20:07:53,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:53,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:53,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:53,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-04-06 20:07:53,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 693 backedges. 122 proven. 1 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2022-04-06 20:07:53,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572686148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:53,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:53,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 4, 4] total 27 [2022-04-06 20:07:53,459 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:53,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1009066158] [2022-04-06 20:07:53,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1009066158] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:53,459 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:53,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:07:53,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307614566] [2022-04-06 20:07:53,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:53,460 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:07:53,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:53,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:07:53,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2022-04-06 20:07:53,460 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:53,791 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-04-06 20:07:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:07:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-04-06 20:07:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:53,792 INFO L225 Difference]: With dead ends: 91 [2022-04-06 20:07:53,792 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 20:07:53,793 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=833, Invalid=1519, Unknown=0, NotChecked=0, Total=2352 [2022-04-06 20:07:53,793 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:53,794 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 25 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:53,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 20:07:53,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-04-06 20:07:53,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-04-06 20:07:53,802 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 76 [2022-04-06 20:07:53,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:53,802 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-04-06 20:07:53,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.88) internal successors, (72), 24 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:53,802 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-04-06 20:07:53,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 20:07:53,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:53,803 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:53,820 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 20:07:54,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-04-06 20:07:54,007 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:54,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:54,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1170364417, now seen corresponding path program 43 times [2022-04-06 20:07:54,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:54,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1083636785] [2022-04-06 20:07:54,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:54,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:54,009 INFO L85 PathProgramCache]: Analyzing trace with hash 1170364417, now seen corresponding path program 44 times [2022-04-06 20:07:54,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:54,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488732223] [2022-04-06 20:07:54,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:54,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:54,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:54,299 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 22 proven. 737 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:54,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:54,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488732223] [2022-04-06 20:07:54,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488732223] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:54,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808771995] [2022-04-06 20:07:54,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:54,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:54,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:54,301 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 20:07:54,303 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 20:07:54,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:54,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:54,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:07:54,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 757 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:54,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:55,354 INFO L134 CoverageAnalysis]: Checked inductivity of 759 backedges. 757 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:07:55,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808771995] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:55,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:55,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 70 [2022-04-06 20:07:55,355 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:55,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1083636785] [2022-04-06 20:07:55,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1083636785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:55,355 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:55,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:07:55,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167205396] [2022-04-06 20:07:55,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:55,355 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:07:55,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:55,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:07:55,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1336, Invalid=3494, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:07:55,357 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:55,865 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-04-06 20:07:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:07:55,866 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-04-06 20:07:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:55,866 INFO L225 Difference]: With dead ends: 94 [2022-04-06 20:07:55,866 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 20:07:55,868 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2717 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1934, Invalid=6622, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:07:55,869 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:55,869 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 30 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 20:07:55,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-04-06 20:07:55,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:55,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-04-06 20:07:55,878 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 79 [2022-04-06 20:07:55,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:55,878 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-04-06 20:07:55,878 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:55,879 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-04-06 20:07:55,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-04-06 20:07:55,879 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:55,879 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:55,896 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 20:07:56,083 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:56,083 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:56,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:56,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1946247077, now seen corresponding path program 45 times [2022-04-06 20:07:56,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:56,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1702213441] [2022-04-06 20:07:56,085 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:56,085 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:56,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1946247077, now seen corresponding path program 46 times [2022-04-06 20:07:56,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:56,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837673851] [2022-04-06 20:07:56,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:56,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:56,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 23 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837673851] [2022-04-06 20:07:56,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837673851] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:56,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056433194] [2022-04-06 20:07:56,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:07:56,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:56,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:56,391 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 20:07:56,421 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 20:07:56,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:07:56,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:56,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 20:07:56,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:56,634 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 23 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:56,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:57,331 INFO L134 CoverageAnalysis]: Checked inductivity of 828 backedges. 23 proven. 805 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056433194] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:57,331 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 52 [2022-04-06 20:07:57,332 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:57,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1702213441] [2022-04-06 20:07:57,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1702213441] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:57,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:57,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:07:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473588322] [2022-04-06 20:07:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:57,332 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:07:57,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:57,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:07:57,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:07:57,333 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:57,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:57,697 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-04-06 20:07:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:07:57,697 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-04-06 20:07:57,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:57,698 INFO L225 Difference]: With dead ends: 97 [2022-04-06 20:07:57,698 INFO L226 Difference]: Without dead ends: 89 [2022-04-06 20:07:57,699 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2502, Invalid=3198, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:07:57,700 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:57,700 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 25 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:57,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-04-06 20:07:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-04-06 20:07:57,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-04-06 20:07:57,710 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 82 [2022-04-06 20:07:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:57,710 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-04-06 20:07:57,710 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-04-06 20:07:57,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-04-06 20:07:57,711 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:57,711 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:57,728 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 20:07:57,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:57,915 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 752584065, now seen corresponding path program 47 times [2022-04-06 20:07:57,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:57,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17014844] [2022-04-06 20:07:57,916 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:57,917 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:57,917 INFO L85 PathProgramCache]: Analyzing trace with hash 752584065, now seen corresponding path program 48 times [2022-04-06 20:07:57,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:57,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740942490] [2022-04-06 20:07:57,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:57,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:57,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:58,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:58,252 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 24 proven. 876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:58,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740942490] [2022-04-06 20:07:58,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740942490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:58,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577166262] [2022-04-06 20:07:58,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:07:58,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:58,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:58,254 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 20:07:58,271 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 20:07:58,294 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:07:58,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:58,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:07:58,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:07:58,427 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-04-06 20:07:58,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:07:58,522 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 140 proven. 1 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2022-04-06 20:07:58,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577166262] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:07:58,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:07:58,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 4, 4] total 30 [2022-04-06 20:07:58,523 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:07:58,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17014844] [2022-04-06 20:07:58,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17014844] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:07:58,523 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:07:58,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:07:58,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496566165] [2022-04-06 20:07:58,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:07:58,524 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:07:58,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:58,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:07:58,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2022-04-06 20:07:58,524 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:07:58,917 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-04-06 20:07:58,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:07:58,918 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-04-06 20:07:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:07:58,918 INFO L225 Difference]: With dead ends: 100 [2022-04-06 20:07:58,918 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 20:07:58,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 168 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1058, Invalid=1912, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:07:58,920 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:07:58,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 30 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:07:58,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 20:07:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-04-06 20:07:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-04-06 20:07:58,928 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2022-04-06 20:07:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:07:58,929 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-04-06 20:07:58,929 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.892857142857143) internal successors, (81), 27 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:07:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-04-06 20:07:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-04-06 20:07:58,929 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:07:58,929 INFO L499 BasicCegarLoop]: trace histogram [26, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:07:58,945 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 20:07:59,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 20:07:59,130 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:07:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:07:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1627962843, now seen corresponding path program 49 times [2022-04-06 20:07:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:07:59,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2146259901] [2022-04-06 20:07:59,131 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:07:59,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:07:59,131 INFO L85 PathProgramCache]: Analyzing trace with hash -1627962843, now seen corresponding path program 50 times [2022-04-06 20:07:59,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:07:59,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999834464] [2022-04-06 20:07:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:07:59,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:07:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:59,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:07:59,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:07:59,429 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 25 proven. 950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:07:59,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:07:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999834464] [2022-04-06 20:07:59,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999834464] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:07:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625221469] [2022-04-06 20:07:59,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:07:59,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:07:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:07:59,431 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 20:07:59,432 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 20:07:59,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:07:59,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:07:59,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:07:59,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 973 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:00,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:00,649 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 973 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:00,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625221469] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:00,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:00,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 79 [2022-04-06 20:08:00,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:00,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2146259901] [2022-04-06 20:08:00,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2146259901] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:00,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:00,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:08:00,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515390079] [2022-04-06 20:08:00,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:00,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:08:00,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:00,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:08:00,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1705, Invalid=4457, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:08:00,651 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:01,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:01,286 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-04-06 20:08:01,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:08:01,286 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-04-06 20:08:01,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:01,287 INFO L225 Difference]: With dead ends: 103 [2022-04-06 20:08:01,287 INFO L226 Difference]: Without dead ends: 95 [2022-04-06 20:08:01,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3500 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2459, Invalid=8461, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:08:01,289 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:01,289 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 25 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-04-06 20:08:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-04-06 20:08:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-04-06 20:08:01,299 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 88 [2022-04-06 20:08:01,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:01,300 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-04-06 20:08:01,300 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.896551724137931) internal successors, (84), 28 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:01,300 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-04-06 20:08:01,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 20:08:01,300 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:01,300 INFO L499 BasicCegarLoop]: trace histogram [27, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:01,316 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 20:08:01,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 20:08:01,503 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:01,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:01,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2000907519, now seen corresponding path program 51 times [2022-04-06 20:08:01,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:01,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1871688071] [2022-04-06 20:08:01,505 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:01,505 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:01,505 INFO L85 PathProgramCache]: Analyzing trace with hash -2000907519, now seen corresponding path program 52 times [2022-04-06 20:08:01,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:01,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125685947] [2022-04-06 20:08:01,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:01,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:01,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:01,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:01,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 26 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:01,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125685947] [2022-04-06 20:08:01,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125685947] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:01,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938852154] [2022-04-06 20:08:01,856 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:01,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:01,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:01,857 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 20:08:01,861 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 20:08:01,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:01,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:01,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 20:08:01,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:02,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 26 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:02,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:02,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1053 backedges. 26 proven. 1027 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:02,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938852154] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:02,780 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:02,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 54 [2022-04-06 20:08:02,780 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:02,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1871688071] [2022-04-06 20:08:02,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1871688071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:02,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:02,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:08:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304042262] [2022-04-06 20:08:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:02,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:08:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:08:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:02,781 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 30 states, 30 states have (on average 2.9) internal successors, (87), 29 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:03,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:03,184 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-04-06 20:08:03,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:08:03,185 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 29 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-04-06 20:08:03,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:03,185 INFO L225 Difference]: With dead ends: 106 [2022-04-06 20:08:03,185 INFO L226 Difference]: Without dead ends: 98 [2022-04-06 20:08:03,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2812, Invalid=3668, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:08:03,187 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:03,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 40 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:03,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-04-06 20:08:03,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-04-06 20:08:03,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:03,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-04-06 20:08:03,199 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 91 [2022-04-06 20:08:03,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:03,200 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-04-06 20:08:03,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.9) internal successors, (87), 29 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:03,200 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-04-06 20:08:03,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 20:08:03,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:03,201 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:03,217 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 20:08:03,403 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 20:08:03,403 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:03,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:03,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1315355483, now seen corresponding path program 53 times [2022-04-06 20:08:03,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:03,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1376399127] [2022-04-06 20:08:03,405 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:03,405 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:03,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1315355483, now seen corresponding path program 54 times [2022-04-06 20:08:03,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:03,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801803634] [2022-04-06 20:08:03,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:03,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 27 proven. 1107 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:03,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801803634] [2022-04-06 20:08:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801803634] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790883370] [2022-04-06 20:08:03,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:03,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:03,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:03,756 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 20:08:03,758 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 20:08:03,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:03,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:03,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:03,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 158 proven. 1 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-04-06 20:08:03,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:04,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1134 backedges. 158 proven. 1 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2022-04-06 20:08:04,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790883370] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:04,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:04,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 4, 4] total 33 [2022-04-06 20:08:04,014 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:04,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1376399127] [2022-04-06 20:08:04,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1376399127] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:04,014 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:04,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:08:04,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618744806] [2022-04-06 20:08:04,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:04,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:08:04,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:04,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:08:04,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=614, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 20:08:04,015 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:04,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:04,472 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-04-06 20:08:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:08:04,472 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-04-06 20:08:04,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:04,473 INFO L225 Difference]: With dead ends: 109 [2022-04-06 20:08:04,473 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 20:08:04,473 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 186 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 543 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1310, Invalid=2350, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:08:04,474 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 93 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:04,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 40 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:04,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 20:08:04,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-04-06 20:08:04,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:04,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-04-06 20:08:04,488 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 94 [2022-04-06 20:08:04,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:04,488 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-04-06 20:08:04,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.903225806451613) internal successors, (90), 30 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:04,488 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-04-06 20:08:04,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 20:08:04,489 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:04,489 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:04,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:04,703 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:04,703 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:04,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -604143487, now seen corresponding path program 55 times [2022-04-06 20:08:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:04,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1389923093] [2022-04-06 20:08:04,704 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:04,704 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -604143487, now seen corresponding path program 56 times [2022-04-06 20:08:04,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:04,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93602936] [2022-04-06 20:08:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:04,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:04,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:05,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:05,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:05,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 28 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:05,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93602936] [2022-04-06 20:08:05,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93602936] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:05,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228253538] [2022-04-06 20:08:05,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:05,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:05,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:05,041 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 20:08:05,042 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 20:08:05,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:05,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:05,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:08:05,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 1216 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:05,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 1216 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:06,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228253538] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:06,442 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:06,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 88 [2022-04-06 20:08:06,442 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:06,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1389923093] [2022-04-06 20:08:06,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1389923093] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:06,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:06,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:08:06,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390290581] [2022-04-06 20:08:06,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:06,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:08:06,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:06,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:08:06,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=5537, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:08:06,444 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:07,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:07,172 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-04-06 20:08:07,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:08:07,172 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-04-06 20:08:07,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:07,173 INFO L225 Difference]: With dead ends: 112 [2022-04-06 20:08:07,173 INFO L226 Difference]: Without dead ends: 104 [2022-04-06 20:08:07,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4382 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3047, Invalid=10525, Unknown=0, NotChecked=0, Total=13572 [2022-04-06 20:08:07,175 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:07,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 45 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:07,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-04-06 20:08:07,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-04-06 20:08:07,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:07,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-04-06 20:08:07,189 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 97 [2022-04-06 20:08:07,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:07,189 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-04-06 20:08:07,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.90625) internal successors, (93), 31 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:07,190 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-04-06 20:08:07,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 20:08:07,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:07,190 INFO L499 BasicCegarLoop]: trace histogram [30, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:07,211 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 20:08:07,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:07,407 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:07,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:07,408 INFO L85 PathProgramCache]: Analyzing trace with hash 38758181, now seen corresponding path program 57 times [2022-04-06 20:08:07,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:07,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1308676133] [2022-04-06 20:08:07,409 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:07,409 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:07,409 INFO L85 PathProgramCache]: Analyzing trace with hash 38758181, now seen corresponding path program 58 times [2022-04-06 20:08:07,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:07,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607479369] [2022-04-06 20:08:07,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:07,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:07,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:07,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 29 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:07,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:07,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607479369] [2022-04-06 20:08:07,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607479369] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:07,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275816140] [2022-04-06 20:08:07,809 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:07,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:07,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:07,810 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 20:08:07,811 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 20:08:07,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:07,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:07,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 20:08:07,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 29 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:08,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1305 backedges. 29 proven. 1276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275816140] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:08,690 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:08,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32, 32] total 54 [2022-04-06 20:08:08,690 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1308676133] [2022-04-06 20:08:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1308676133] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:08,690 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:08,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:08:08,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897597002] [2022-04-06 20:08:08,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:08,691 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:08:08,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:08,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:08:08,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:08,692 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:09,254 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-04-06 20:08:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:08:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2022-04-06 20:08:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:09,255 INFO L225 Difference]: With dead ends: 115 [2022-04-06 20:08:09,255 INFO L226 Difference]: Without dead ends: 107 [2022-04-06 20:08:09,257 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2971, Invalid=4001, Unknown=0, NotChecked=0, Total=6972 [2022-04-06 20:08:09,257 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:09,257 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 35 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-04-06 20:08:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-04-06 20:08:09,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:09,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2022-04-06 20:08:09,271 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 100 [2022-04-06 20:08:09,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:09,271 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2022-04-06 20:08:09,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.909090909090909) internal successors, (96), 32 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:09,272 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2022-04-06 20:08:09,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 20:08:09,272 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:09,272 INFO L499 BasicCegarLoop]: trace histogram [31, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:09,295 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 20:08:09,495 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:09,495 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:09,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1463176705, now seen corresponding path program 59 times [2022-04-06 20:08:09,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:09,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1678587726] [2022-04-06 20:08:09,496 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:09,496 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:09,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1463176705, now seen corresponding path program 60 times [2022-04-06 20:08:09,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:09,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446681697] [2022-04-06 20:08:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:09,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:09,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:09,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:09,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 30 proven. 1365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:09,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:09,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446681697] [2022-04-06 20:08:09,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446681697] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:09,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179697686] [2022-04-06 20:08:09,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:09,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:09,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:09,913 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 20:08:09,913 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 20:08:09,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:09,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:09,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 176 proven. 1 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2022-04-06 20:08:10,088 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:10,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1395 backedges. 176 proven. 1 refuted. 0 times theorem prover too weak. 1218 trivial. 0 not checked. [2022-04-06 20:08:10,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179697686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:10,190 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:10,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 4, 4] total 36 [2022-04-06 20:08:10,190 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:10,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1678587726] [2022-04-06 20:08:10,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1678587726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:10,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:10,190 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:08:10,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477537639] [2022-04-06 20:08:10,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:10,190 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:08:10,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:10,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:08:10,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=725, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 20:08:10,191 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:10,702 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-04-06 20:08:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:08:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-04-06 20:08:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:10,703 INFO L225 Difference]: With dead ends: 118 [2022-04-06 20:08:10,703 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 20:08:10,704 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1589, Invalid=2833, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:08:10,704 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 102 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:10,704 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 35 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:10,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 20:08:10,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-04-06 20:08:10,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0288461538461537) internal successors, (107), 104 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 111 transitions. [2022-04-06 20:08:10,716 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 111 transitions. Word has length 103 [2022-04-06 20:08:10,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:10,716 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 111 transitions. [2022-04-06 20:08:10,716 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.911764705882353) internal successors, (99), 33 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:10,716 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 111 transitions. [2022-04-06 20:08:10,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-04-06 20:08:10,717 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:10,717 INFO L499 BasicCegarLoop]: trace histogram [32, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:10,733 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 20:08:10,917 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-04-06 20:08:10,917 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:10,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash 2038540709, now seen corresponding path program 61 times [2022-04-06 20:08:10,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:10,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1939781525] [2022-04-06 20:08:10,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:10,919 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:10,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2038540709, now seen corresponding path program 62 times [2022-04-06 20:08:10,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:10,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144011550] [2022-04-06 20:08:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:10,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:11,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:11,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:11,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 31 proven. 1457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:11,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144011550] [2022-04-06 20:08:11,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144011550] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:11,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382300650] [2022-04-06 20:08:11,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:11,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:11,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:11,337 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 20:08:11,338 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 20:08:11,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:08:11,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:12,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 1486 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:12,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1488 backedges. 1486 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:13,050 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382300650] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:13,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:13,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 97 [2022-04-06 20:08:13,051 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1939781525] [2022-04-06 20:08:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1939781525] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:13,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:13,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:08:13,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706304804] [2022-04-06 20:08:13,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:13,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:08:13,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:13,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:08:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2578, Invalid=6734, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:08:13,053 INFO L87 Difference]: Start difference. First operand 109 states and 111 transitions. Second operand has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 34 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:13,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:13,964 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-04-06 20:08:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:08:13,964 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 34 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2022-04-06 20:08:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:13,966 INFO L225 Difference]: With dead ends: 121 [2022-04-06 20:08:13,966 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 20:08:13,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 151 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5363 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=3698, Invalid=12814, Unknown=0, NotChecked=0, Total=16512 [2022-04-06 20:08:13,968 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:13,968 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 35 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:13,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 20:08:13,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-04-06 20:08:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2022-04-06 20:08:13,981 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 106 [2022-04-06 20:08:13,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:13,982 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2022-04-06 20:08:13,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.914285714285714) internal successors, (102), 34 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:13,982 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2022-04-06 20:08:13,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 20:08:13,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:13,983 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:14,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:14,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:14,199 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:14,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:14,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1493105537, now seen corresponding path program 63 times [2022-04-06 20:08:14,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:14,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988884252] [2022-04-06 20:08:14,200 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:14,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:14,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1493105537, now seen corresponding path program 64 times [2022-04-06 20:08:14,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:14,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824978271] [2022-04-06 20:08:14,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:14,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:14,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:14,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:14,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 32 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:14,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824978271] [2022-04-06 20:08:14,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824978271] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:14,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483854747] [2022-04-06 20:08:14,654 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:14,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:14,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:14,655 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 20:08:14,657 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 20:08:14,719 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:14,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:14,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 20:08:14,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 32 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:14,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1584 backedges. 32 proven. 1552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:15,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483854747] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:15,543 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:15,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 54 [2022-04-06 20:08:15,543 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:15,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988884252] [2022-04-06 20:08:15,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988884252] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:15,544 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:15,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:08:15,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101080335] [2022-04-06 20:08:15,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:15,544 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:08:15,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:15,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:08:15,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:15,545 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:16,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:16,111 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-04-06 20:08:16,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:08:16,112 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-04-06 20:08:16,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:16,112 INFO L225 Difference]: With dead ends: 124 [2022-04-06 20:08:16,112 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 20:08:16,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3130, Invalid=4352, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:08:16,114 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:16,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 35 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:16,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 20:08:16,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-04-06 20:08:16,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:16,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2022-04-06 20:08:16,133 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2022-04-06 20:08:16,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:16,133 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2022-04-06 20:08:16,133 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.9166666666666665) internal successors, (105), 35 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:16,133 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2022-04-06 20:08:16,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-04-06 20:08:16,134 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:16,134 INFO L499 BasicCegarLoop]: trace histogram [34, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:16,151 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 20:08:16,339 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:16,339 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:16,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash 295177253, now seen corresponding path program 65 times [2022-04-06 20:08:16,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:16,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [806326781] [2022-04-06 20:08:16,341 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:16,341 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:16,341 INFO L85 PathProgramCache]: Analyzing trace with hash 295177253, now seen corresponding path program 66 times [2022-04-06 20:08:16,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:16,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200349143] [2022-04-06 20:08:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:16,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:16,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:16,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:16,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 33 proven. 1650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:16,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:16,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200349143] [2022-04-06 20:08:16,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200349143] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:16,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390375837] [2022-04-06 20:08:16,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:16,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:16,847 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 20:08:16,849 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 20:08:16,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:16,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:16,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 194 proven. 1 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2022-04-06 20:08:17,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1683 backedges. 194 proven. 1 refuted. 0 times theorem prover too weak. 1488 trivial. 0 not checked. [2022-04-06 20:08:17,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390375837] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:17,180 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:17,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 4, 4] total 39 [2022-04-06 20:08:17,180 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:17,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [806326781] [2022-04-06 20:08:17,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [806326781] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:17,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:17,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:08:17,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693234554] [2022-04-06 20:08:17,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:17,181 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:08:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:17,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:08:17,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=637, Invalid=845, Unknown=0, NotChecked=0, Total=1482 [2022-04-06 20:08:17,182 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:17,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:17,784 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-04-06 20:08:17,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:08:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2022-04-06 20:08:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:17,785 INFO L225 Difference]: With dead ends: 127 [2022-04-06 20:08:17,785 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 20:08:17,786 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 222 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1895, Invalid=3361, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:08:17,786 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:17,787 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 35 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:17,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 20:08:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-04-06 20:08:17,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:17,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2022-04-06 20:08:17,802 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 112 [2022-04-06 20:08:17,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:17,802 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2022-04-06 20:08:17,802 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.918918918918919) internal successors, (108), 36 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:17,802 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2022-04-06 20:08:17,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 20:08:17,803 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:17,803 INFO L499 BasicCegarLoop]: trace histogram [35, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:17,820 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 20:08:18,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 20:08:18,007 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:18,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:18,008 INFO L85 PathProgramCache]: Analyzing trace with hash -303068927, now seen corresponding path program 67 times [2022-04-06 20:08:18,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:18,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1945584921] [2022-04-06 20:08:18,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:18,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash -303068927, now seen corresponding path program 68 times [2022-04-06 20:08:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:18,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581271603] [2022-04-06 20:08:18,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:18,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:18,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:18,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:18,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 34 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:18,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:18,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581271603] [2022-04-06 20:08:18,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581271603] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:18,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80015281] [2022-04-06 20:08:18,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:18,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:18,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:18,503 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 20:08:18,503 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 20:08:18,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:18,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:18,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:08:18,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 1783 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:19,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 1783 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:20,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80015281] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:20,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:20,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 106 [2022-04-06 20:08:20,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:20,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1945584921] [2022-04-06 20:08:20,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1945584921] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:20,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:20,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:08:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809183883] [2022-04-06 20:08:20,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:20,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:08:20,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:20,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:08:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3082, Invalid=8048, Unknown=0, NotChecked=0, Total=11130 [2022-04-06 20:08:20,424 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 37 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:21,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:21,466 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-04-06 20:08:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:08:21,466 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 37 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-04-06 20:08:21,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:21,467 INFO L225 Difference]: With dead ends: 130 [2022-04-06 20:08:21,467 INFO L226 Difference]: Without dead ends: 122 [2022-04-06 20:08:21,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6443 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4412, Invalid=15328, Unknown=0, NotChecked=0, Total=19740 [2022-04-06 20:08:21,469 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 114 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:21,469 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 35 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-04-06 20:08:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-04-06 20:08:21,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0258620689655173) internal successors, (119), 116 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 123 transitions. [2022-04-06 20:08:21,481 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 123 transitions. Word has length 115 [2022-04-06 20:08:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:21,481 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 123 transitions. [2022-04-06 20:08:21,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9210526315789473) internal successors, (111), 37 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:21,481 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 123 transitions. [2022-04-06 20:08:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 20:08:21,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:21,482 INFO L499 BasicCegarLoop]: trace histogram [36, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:21,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 20:08:21,686 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-04-06 20:08:21,686 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:21,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:21,686 INFO L85 PathProgramCache]: Analyzing trace with hash 1459261093, now seen corresponding path program 69 times [2022-04-06 20:08:21,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:21,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2035971322] [2022-04-06 20:08:21,687 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:21,687 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:21,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1459261093, now seen corresponding path program 70 times [2022-04-06 20:08:21,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:21,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017415290] [2022-04-06 20:08:21,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:21,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:22,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:22,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 35 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:22,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017415290] [2022-04-06 20:08:22,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017415290] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:22,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511207136] [2022-04-06 20:08:22,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:22,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:22,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:22,247 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:08:22,253 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 20:08:22,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 20:08:22,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:22,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 35 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:22,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1890 backedges. 35 proven. 1855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511207136] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:23,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:23,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 54 [2022-04-06 20:08:23,065 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:23,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2035971322] [2022-04-06 20:08:23,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2035971322] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:23,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:23,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:08:23,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505959074] [2022-04-06 20:08:23,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:23,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:08:23,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:23,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:08:23,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:23,067 INFO L87 Difference]: Start difference. First operand 121 states and 123 transitions. Second operand has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 38 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:23,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:23,810 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2022-04-06 20:08:23,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:08:23,811 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 38 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2022-04-06 20:08:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:23,812 INFO L225 Difference]: With dead ends: 133 [2022-04-06 20:08:23,812 INFO L226 Difference]: Without dead ends: 125 [2022-04-06 20:08:23,813 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 222 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3289, Invalid=4721, Unknown=0, NotChecked=0, Total=8010 [2022-04-06 20:08:23,814 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 117 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:23,815 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 40 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:23,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-04-06 20:08:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-04-06 20:08:23,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:23,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2022-04-06 20:08:23,829 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 118 [2022-04-06 20:08:23,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:23,829 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2022-04-06 20:08:23,830 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.923076923076923) internal successors, (114), 38 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:23,830 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2022-04-06 20:08:23,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 20:08:23,831 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:23,831 INFO L499 BasicCegarLoop]: trace histogram [37, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:23,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:24,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 20:08:24,054 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:24,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:24,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1352660609, now seen corresponding path program 71 times [2022-04-06 20:08:24,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:24,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1049803541] [2022-04-06 20:08:24,055 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:24,055 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:24,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1352660609, now seen corresponding path program 72 times [2022-04-06 20:08:24,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:24,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516398799] [2022-04-06 20:08:24,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:24,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:24,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:24,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 36 proven. 1962 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:24,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:24,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516398799] [2022-04-06 20:08:24,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516398799] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:24,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671503741] [2022-04-06 20:08:24,690 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:24,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:24,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:24,691 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 20:08:24,723 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 20:08:24,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:24,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:24,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:24,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:24,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 212 proven. 1 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2022-04-06 20:08:24,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:25,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1998 backedges. 212 proven. 1 refuted. 0 times theorem prover too weak. 1785 trivial. 0 not checked. [2022-04-06 20:08:25,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671503741] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:25,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:25,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 4, 4] total 42 [2022-04-06 20:08:25,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:25,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1049803541] [2022-04-06 20:08:25,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1049803541] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:25,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:25,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:08:25,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937657676] [2022-04-06 20:08:25,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:25,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:08:25,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:25,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:08:25,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=974, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 20:08:25,042 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:25,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:25,762 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-04-06 20:08:25,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:08:25,763 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-04-06 20:08:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:25,763 INFO L225 Difference]: With dead ends: 136 [2022-04-06 20:08:25,763 INFO L226 Difference]: Without dead ends: 128 [2022-04-06 20:08:25,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 240 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2228, Invalid=3934, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:08:25,765 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 120 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:25,765 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 40 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-04-06 20:08:25,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-04-06 20:08:25,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2022-04-06 20:08:25,784 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 121 [2022-04-06 20:08:25,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:25,785 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2022-04-06 20:08:25,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 39 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2022-04-06 20:08:25,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 20:08:25,785 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:25,785 INFO L499 BasicCegarLoop]: trace histogram [38, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:25,810 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 20:08:26,007 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 20:08:26,007 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:26,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:26,008 INFO L85 PathProgramCache]: Analyzing trace with hash -401526491, now seen corresponding path program 73 times [2022-04-06 20:08:26,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:26,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [797577352] [2022-04-06 20:08:26,009 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:26,009 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:26,009 INFO L85 PathProgramCache]: Analyzing trace with hash -401526491, now seen corresponding path program 74 times [2022-04-06 20:08:26,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:26,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513143069] [2022-04-06 20:08:26,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:26,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:26,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:26,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:26,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 37 proven. 2072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:26,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513143069] [2022-04-06 20:08:26,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513143069] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:26,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964463885] [2022-04-06 20:08:26,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:26,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:26,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:26,579 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 20:08:26,579 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 20:08:26,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:26,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:26,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:08:26,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:27,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 2107 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:27,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:28,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2109 backedges. 2107 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:28,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964463885] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:28,789 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:28,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 115 [2022-04-06 20:08:28,789 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:28,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [797577352] [2022-04-06 20:08:28,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [797577352] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:28,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:28,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:08:28,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613000381] [2022-04-06 20:08:28,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:28,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:08:28,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:28,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:08:28,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3631, Invalid=9479, Unknown=0, NotChecked=0, Total=13110 [2022-04-06 20:08:28,791 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:29,928 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-04-06 20:08:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:08:29,928 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-04-06 20:08:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:29,929 INFO L225 Difference]: With dead ends: 139 [2022-04-06 20:08:29,929 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 20:08:29,931 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7622 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=5189, Invalid=18067, Unknown=0, NotChecked=0, Total=23256 [2022-04-06 20:08:29,932 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 123 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:29,932 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 30 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 20:08:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-04-06 20:08:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2022-04-06 20:08:29,962 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 124 [2022-04-06 20:08:29,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:29,963 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2022-04-06 20:08:29,963 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.926829268292683) internal successors, (120), 40 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:29,963 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2022-04-06 20:08:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 20:08:29,963 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:29,963 INFO L499 BasicCegarLoop]: trace histogram [39, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:29,988 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 20:08:30,186 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 20:08:30,186 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:30,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:30,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1772635137, now seen corresponding path program 75 times [2022-04-06 20:08:30,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:30,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1780011950] [2022-04-06 20:08:30,187 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:30,187 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:30,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1772635137, now seen corresponding path program 76 times [2022-04-06 20:08:30,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:30,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472405505] [2022-04-06 20:08:30,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:30,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:30,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:30,740 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 38 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:30,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:30,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472405505] [2022-04-06 20:08:30,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472405505] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:30,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511789931] [2022-04-06 20:08:30,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:30,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:30,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:30,742 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 20:08:30,771 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 20:08:30,809 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:30,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:30,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 20:08:30,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 38 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:30,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2223 backedges. 38 proven. 2185 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:31,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511789931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:31,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:31,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41, 41] total 54 [2022-04-06 20:08:31,504 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:31,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1780011950] [2022-04-06 20:08:31,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1780011950] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:31,504 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:31,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:08:31,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83424731] [2022-04-06 20:08:31,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:31,505 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:08:31,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:31,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:08:31,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:31,506 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:32,263 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-04-06 20:08:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:08:32,263 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-04-06 20:08:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:32,264 INFO L225 Difference]: With dead ends: 142 [2022-04-06 20:08:32,264 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 20:08:32,265 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3448, Invalid=5108, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:08:32,265 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 126 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:32,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 40 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:32,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 20:08:32,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-04-06 20:08:32,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0234375) internal successors, (131), 128 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:32,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 135 transitions. [2022-04-06 20:08:32,286 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 135 transitions. Word has length 127 [2022-04-06 20:08:32,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:32,286 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 135 transitions. [2022-04-06 20:08:32,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.9285714285714284) internal successors, (123), 41 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:32,287 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 135 transitions. [2022-04-06 20:08:32,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 20:08:32,287 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:32,287 INFO L499 BasicCegarLoop]: trace histogram [40, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:32,310 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:32,507 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 20:08:32,507 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:32,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:32,508 INFO L85 PathProgramCache]: Analyzing trace with hash -180096091, now seen corresponding path program 77 times [2022-04-06 20:08:32,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:32,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523923277] [2022-04-06 20:08:32,508 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:32,509 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:32,509 INFO L85 PathProgramCache]: Analyzing trace with hash -180096091, now seen corresponding path program 78 times [2022-04-06 20:08:32,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:32,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71833291] [2022-04-06 20:08:32,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:32,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:33,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 39 proven. 2301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:33,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:33,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71833291] [2022-04-06 20:08:33,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71833291] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907259271] [2022-04-06 20:08:33,082 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:33,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:33,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:33,083 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 20:08:33,102 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 20:08:33,125 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:33,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:33,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:33,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:33,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 230 proven. 1 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2022-04-06 20:08:33,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:33,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2340 backedges. 230 proven. 1 refuted. 0 times theorem prover too weak. 2109 trivial. 0 not checked. [2022-04-06 20:08:33,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907259271] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:33,448 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 4, 4] total 45 [2022-04-06 20:08:33,448 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:33,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523923277] [2022-04-06 20:08:33,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523923277] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:33,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:33,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:08:33,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047347334] [2022-04-06 20:08:33,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:33,449 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:08:33,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:33,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:08:33,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=868, Invalid=1112, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 20:08:33,450 INFO L87 Difference]: Start difference. First operand 133 states and 135 transitions. Second operand has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 42 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:34,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:34,229 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-04-06 20:08:34,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:08:34,230 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 42 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2022-04-06 20:08:34,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:34,231 INFO L225 Difference]: With dead ends: 145 [2022-04-06 20:08:34,231 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 20:08:34,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 258 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1017 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2588, Invalid=4552, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:08:34,232 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 129 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:34,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 35 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:34,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 20:08:34,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-04-06 20:08:34,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:34,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2022-04-06 20:08:34,255 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 130 [2022-04-06 20:08:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:34,255 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2022-04-06 20:08:34,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.9302325581395348) internal successors, (126), 42 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:34,255 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2022-04-06 20:08:34,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-04-06 20:08:34,256 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:34,256 INFO L499 BasicCegarLoop]: trace histogram [41, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:34,285 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 20:08:34,471 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-04-06 20:08:34,471 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:34,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1335914881, now seen corresponding path program 79 times [2022-04-06 20:08:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [89940121] [2022-04-06 20:08:34,473 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:34,473 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:34,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1335914881, now seen corresponding path program 80 times [2022-04-06 20:08:34,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:34,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094917052] [2022-04-06 20:08:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:34,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:35,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:35,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 40 proven. 2420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:35,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094917052] [2022-04-06 20:08:35,176 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094917052] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:35,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170927583] [2022-04-06 20:08:35,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:35,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:35,177 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:35,177 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 20:08:35,178 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 20:08:35,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:35,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:35,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:08:35,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 2458 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:36,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:37,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 2458 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170927583] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:37,734 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:37,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43, 43] total 124 [2022-04-06 20:08:37,734 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:37,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [89940121] [2022-04-06 20:08:37,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [89940121] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:37,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:37,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:08:37,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415327477] [2022-04-06 20:08:37,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:37,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:08:37,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:37,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:08:37,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4225, Invalid=11027, Unknown=0, NotChecked=0, Total=15252 [2022-04-06 20:08:37,736 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 43 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:39,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:39,054 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-04-06 20:08:39,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:08:39,054 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 43 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-04-06 20:08:39,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:39,055 INFO L225 Difference]: With dead ends: 148 [2022-04-06 20:08:39,055 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 20:08:39,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8900 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6029, Invalid=21031, Unknown=0, NotChecked=0, Total=27060 [2022-04-06 20:08:39,057 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:39,058 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 35 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 20:08:39,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-04-06 20:08:39,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0223880597014925) internal successors, (137), 134 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:39,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2022-04-06 20:08:39,079 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 133 [2022-04-06 20:08:39,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:39,079 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2022-04-06 20:08:39,079 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9318181818181817) internal successors, (129), 43 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:39,079 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2022-04-06 20:08:39,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-04-06 20:08:39,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:39,080 INFO L499 BasicCegarLoop]: trace histogram [42, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:39,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-04-06 20:08:39,281 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-04-06 20:08:39,281 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:39,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:39,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1057303003, now seen corresponding path program 81 times [2022-04-06 20:08:39,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:39,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1787419012] [2022-04-06 20:08:39,282 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:39,282 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:39,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1057303003, now seen corresponding path program 82 times [2022-04-06 20:08:39,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:39,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268681112] [2022-04-06 20:08:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:39,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:39,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:39,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:39,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 41 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:39,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268681112] [2022-04-06 20:08:39,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268681112] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:39,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806513289] [2022-04-06 20:08:39,931 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:39,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:39,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:39,932 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 20:08:39,934 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 20:08:39,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:39,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:39,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 20:08:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:40,188 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 41 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:40,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2583 backedges. 41 proven. 2542 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:40,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806513289] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:40,640 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:40,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 54 [2022-04-06 20:08:40,640 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:40,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1787419012] [2022-04-06 20:08:40,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1787419012] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:40,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:40,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:08:40,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734282091] [2022-04-06 20:08:40,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:40,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:08:40,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:08:40,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:40,641 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand has 45 states, 45 states have (on average 2.933333333333333) internal successors, (132), 44 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:41,475 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-04-06 20:08:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:08:41,475 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.933333333333333) internal successors, (132), 44 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2022-04-06 20:08:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:41,476 INFO L225 Difference]: With dead ends: 151 [2022-04-06 20:08:41,476 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 20:08:41,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 264 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1048 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3607, Invalid=5513, Unknown=0, NotChecked=0, Total=9120 [2022-04-06 20:08:41,477 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 135 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:41,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 40 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:41,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 20:08:41,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-04-06 20:08:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2022-04-06 20:08:41,493 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 136 [2022-04-06 20:08:41,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:41,493 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2022-04-06 20:08:41,493 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.933333333333333) internal successors, (132), 44 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:41,493 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2022-04-06 20:08:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-04-06 20:08:41,493 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:41,493 INFO L499 BasicCegarLoop]: trace histogram [43, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:41,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 20:08:41,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:41,695 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:41,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:41,695 INFO L85 PathProgramCache]: Analyzing trace with hash -954171647, now seen corresponding path program 83 times [2022-04-06 20:08:41,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:41,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1071651191] [2022-04-06 20:08:41,696 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:41,696 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:41,696 INFO L85 PathProgramCache]: Analyzing trace with hash -954171647, now seen corresponding path program 84 times [2022-04-06 20:08:41,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:41,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841993403] [2022-04-06 20:08:41,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:42,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:42,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:42,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 42 proven. 2667 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:42,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841993403] [2022-04-06 20:08:42,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841993403] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:42,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957329637] [2022-04-06 20:08:42,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:42,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:42,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:42,457 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 20:08:42,458 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 20:08:42,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:42,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:42,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:42,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 248 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-04-06 20:08:42,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:42,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2709 backedges. 248 proven. 1 refuted. 0 times theorem prover too weak. 2460 trivial. 0 not checked. [2022-04-06 20:08:42,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957329637] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:42,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 4, 4] total 48 [2022-04-06 20:08:42,812 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:42,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1071651191] [2022-04-06 20:08:42,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1071651191] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:42,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:42,812 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:08:42,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103419765] [2022-04-06 20:08:42,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:42,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:08:42,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:42,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:08:42,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=1259, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 20:08:42,813 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 45 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:43,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:43,684 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-04-06 20:08:43,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:08:43,684 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 45 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-04-06 20:08:43,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:43,685 INFO L225 Difference]: With dead ends: 154 [2022-04-06 20:08:43,685 INFO L226 Difference]: Without dead ends: 146 [2022-04-06 20:08:43,686 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 276 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1158 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2975, Invalid=5215, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:08:43,687 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 138 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:43,687 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 45 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:43,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-04-06 20:08:43,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-04-06 20:08:43,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0214285714285714) internal successors, (143), 140 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:43,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 147 transitions. [2022-04-06 20:08:43,711 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 147 transitions. Word has length 139 [2022-04-06 20:08:43,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:43,711 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 147 transitions. [2022-04-06 20:08:43,711 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.9347826086956523) internal successors, (135), 45 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:43,711 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 147 transitions. [2022-04-06 20:08:43,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-04-06 20:08:43,712 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:43,712 INFO L499 BasicCegarLoop]: trace histogram [44, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:43,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-04-06 20:08:43,923 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:43,923 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:43,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:43,924 INFO L85 PathProgramCache]: Analyzing trace with hash 530438309, now seen corresponding path program 85 times [2022-04-06 20:08:43,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:43,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2095728139] [2022-04-06 20:08:43,924 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:43,925 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:43,925 INFO L85 PathProgramCache]: Analyzing trace with hash 530438309, now seen corresponding path program 86 times [2022-04-06 20:08:43,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:43,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857181721] [2022-04-06 20:08:43,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:43,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:43,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:44,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:44,628 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 43 proven. 2795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:44,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857181721] [2022-04-06 20:08:44,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857181721] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:44,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000423450] [2022-04-06 20:08:44,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:44,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:44,630 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 20:08:44,630 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 20:08:44,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:44,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:44,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:08:44,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:46,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 2836 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:46,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:47,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2838 backedges. 2836 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:47,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000423450] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:47,517 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:47,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 133 [2022-04-06 20:08:47,517 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:47,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2095728139] [2022-04-06 20:08:47,517 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2095728139] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:47,517 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:47,517 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:08:47,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821003693] [2022-04-06 20:08:47,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:47,518 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:08:47,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:47,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:08:47,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4864, Invalid=12692, Unknown=0, NotChecked=0, Total=17556 [2022-04-06 20:08:47,519 INFO L87 Difference]: Start difference. First operand 145 states and 147 transitions. Second operand has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 46 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:49,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:49,201 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-04-06 20:08:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:08:49,201 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 46 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2022-04-06 20:08:49,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:49,202 INFO L225 Difference]: With dead ends: 157 [2022-04-06 20:08:49,202 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 20:08:49,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 199 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10277 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6932, Invalid=24220, Unknown=0, NotChecked=0, Total=31152 [2022-04-06 20:08:49,204 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 141 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:49,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 45 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:08:49,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 20:08:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-04-06 20:08:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:49,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2022-04-06 20:08:49,229 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 142 [2022-04-06 20:08:49,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:49,230 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2022-04-06 20:08:49,230 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9361702127659575) internal successors, (138), 46 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:49,230 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2022-04-06 20:08:49,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-04-06 20:08:49,230 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:49,231 INFO L499 BasicCegarLoop]: trace histogram [45, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:49,253 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 20:08:49,451 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-04-06 20:08:49,452 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:49,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1027576703, now seen corresponding path program 87 times [2022-04-06 20:08:49,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:49,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [586177792] [2022-04-06 20:08:49,453 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:49,453 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1027576703, now seen corresponding path program 88 times [2022-04-06 20:08:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:49,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131179076] [2022-04-06 20:08:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:49,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:50,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:50,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:50,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 44 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:50,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131179076] [2022-04-06 20:08:50,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131179076] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:50,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794880691] [2022-04-06 20:08:50,164 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:08:50,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:50,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:50,166 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 20:08:50,166 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 20:08:50,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:08:50,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:50,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 46 conjunts are in the unsatisfiable core [2022-04-06 20:08:50,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:50,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 44 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:50,453 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:50,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2970 backedges. 44 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794880691] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:50,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:50,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 47] total 54 [2022-04-06 20:08:50,879 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:50,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [586177792] [2022-04-06 20:08:50,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [586177792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:50,879 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:50,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:08:50,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013508556] [2022-04-06 20:08:50,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:50,880 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:08:50,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:50,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:08:50,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:08:50,881 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 48 states, 48 states have (on average 2.9375) internal successors, (141), 47 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:51,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:51,918 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-04-06 20:08:51,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:08:51,918 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 47 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-04-06 20:08:51,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:51,919 INFO L225 Difference]: With dead ends: 160 [2022-04-06 20:08:51,919 INFO L226 Difference]: Without dead ends: 152 [2022-04-06 20:08:51,920 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=3766, Invalid=5936, Unknown=0, NotChecked=0, Total=9702 [2022-04-06 20:08:51,920 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 144 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:51,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 45 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-04-06 20:08:51,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-04-06 20:08:51,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:51,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2022-04-06 20:08:51,941 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 145 [2022-04-06 20:08:51,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:51,941 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2022-04-06 20:08:51,941 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.9375) internal successors, (141), 47 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:51,942 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2022-04-06 20:08:51,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-04-06 20:08:51,942 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:51,942 INFO L499 BasicCegarLoop]: trace histogram [46, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:51,958 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 20:08:52,143 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-04-06 20:08:52,143 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:52,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:52,143 INFO L85 PathProgramCache]: Analyzing trace with hash -141231323, now seen corresponding path program 89 times [2022-04-06 20:08:52,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:52,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [978065628] [2022-04-06 20:08:52,144 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:52,144 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:52,144 INFO L85 PathProgramCache]: Analyzing trace with hash -141231323, now seen corresponding path program 90 times [2022-04-06 20:08:52,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:52,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749597401] [2022-04-06 20:08:52,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:52,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:52,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 45 proven. 3060 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:52,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:52,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749597401] [2022-04-06 20:08:52,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749597401] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:52,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038116582] [2022-04-06 20:08:52,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:08:52,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:52,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:52,930 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 20:08:52,933 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 20:08:52,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:08:52,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:52,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:08:52,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 266 proven. 1 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2022-04-06 20:08:53,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 266 proven. 1 refuted. 0 times theorem prover too weak. 2838 trivial. 0 not checked. [2022-04-06 20:08:53,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038116582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:53,317 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:53,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 4, 4] total 51 [2022-04-06 20:08:53,317 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:53,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [978065628] [2022-04-06 20:08:53,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [978065628] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:53,317 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:53,317 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:08:53,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111295520] [2022-04-06 20:08:53,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:53,318 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:08:53,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:53,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:08:53,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1135, Invalid=1415, Unknown=0, NotChecked=0, Total=2550 [2022-04-06 20:08:53,318 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand has 49 states, 49 states have (on average 2.938775510204082) internal successors, (144), 48 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:54,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:08:54,299 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-04-06 20:08:54,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:08:54,299 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.938775510204082) internal successors, (144), 48 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2022-04-06 20:08:54,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:08:54,300 INFO L225 Difference]: With dead ends: 163 [2022-04-06 20:08:54,300 INFO L226 Difference]: Without dead ends: 155 [2022-04-06 20:08:54,301 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 294 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1308 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3389, Invalid=5923, Unknown=0, NotChecked=0, Total=9312 [2022-04-06 20:08:54,302 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 147 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:08:54,302 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 50 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:08:54,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-04-06 20:08:54,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-04-06 20:08:54,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2022-04-06 20:08:54,328 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 148 [2022-04-06 20:08:54,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:08:54,328 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2022-04-06 20:08:54,329 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.938775510204082) internal successors, (144), 48 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:08:54,329 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2022-04-06 20:08:54,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-04-06 20:08:54,329 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:08:54,329 INFO L499 BasicCegarLoop]: trace histogram [47, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:08:54,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-04-06 20:08:54,529 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-04-06 20:08:54,530 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:08:54,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:08:54,530 INFO L85 PathProgramCache]: Analyzing trace with hash -484951551, now seen corresponding path program 91 times [2022-04-06 20:08:54,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:54,530 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1004779577] [2022-04-06 20:08:54,531 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:08:54,531 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:08:54,531 INFO L85 PathProgramCache]: Analyzing trace with hash -484951551, now seen corresponding path program 92 times [2022-04-06 20:08:54,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:08:54,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521409009] [2022-04-06 20:08:54,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:08:54,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:08:54,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:55,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:08:55,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:08:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 46 proven. 3197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:08:55,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:08:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521409009] [2022-04-06 20:08:55,434 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521409009] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:08:55,434 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897089354] [2022-04-06 20:08:55,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:08:55,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:08:55,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:08:55,435 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 20:08:55,436 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 20:08:55,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:08:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:08:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:08:55,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:08:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 3241 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:57,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:08:58,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3243 backedges. 3241 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:08:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897089354] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:08:58,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:08:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 49, 49] total 142 [2022-04-06 20:08:58,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:08:58,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1004779577] [2022-04-06 20:08:58,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1004779577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:08:58,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:08:58,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:08:58,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311175316] [2022-04-06 20:08:58,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:08:58,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:08:58,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:08:58,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:08:58,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5548, Invalid=14474, Unknown=0, NotChecked=0, Total=20022 [2022-04-06 20:08:58,653 INFO L87 Difference]: Start difference. First operand 154 states and 156 transitions. Second operand has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:00,333 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-04-06 20:09:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:09:00,333 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-04-06 20:09:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:00,334 INFO L225 Difference]: With dead ends: 166 [2022-04-06 20:09:00,334 INFO L226 Difference]: Without dead ends: 158 [2022-04-06 20:09:00,336 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11753 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=7898, Invalid=27634, Unknown=0, NotChecked=0, Total=35532 [2022-04-06 20:09:00,336 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 150 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:00,336 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 25 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:00,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-04-06 20:09:00,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-04-06 20:09:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 159 transitions. [2022-04-06 20:09:00,364 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 159 transitions. Word has length 151 [2022-04-06 20:09:00,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:00,364 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 159 transitions. [2022-04-06 20:09:00,365 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.94) internal successors, (147), 49 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 159 transitions. [2022-04-06 20:09:00,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-04-06 20:09:00,365 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:00,365 INFO L499 BasicCegarLoop]: trace histogram [48, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:00,381 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 20:09:00,566 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:00,566 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:00,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:00,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1052230235, now seen corresponding path program 93 times [2022-04-06 20:09:00,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:00,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846563166] [2022-04-06 20:09:00,567 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:00,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:00,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1052230235, now seen corresponding path program 94 times [2022-04-06 20:09:00,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:00,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495634039] [2022-04-06 20:09:00,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:00,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:00,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:01,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 47 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495634039] [2022-04-06 20:09:01,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495634039] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:01,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942034261] [2022-04-06 20:09:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:01,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:01,463 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 20:09:01,464 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 20:09:01,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:01,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:01,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 20:09:01,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:01,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 47 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:01,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:02,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3384 backedges. 47 proven. 3337 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:02,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942034261] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:02,066 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:02,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 54 [2022-04-06 20:09:02,066 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:02,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846563166] [2022-04-06 20:09:02,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846563166] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:02,066 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:02,066 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:09:02,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818177325] [2022-04-06 20:09:02,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:02,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:09:02,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:02,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:09:02,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:09:02,067 INFO L87 Difference]: Start difference. First operand 157 states and 159 transitions. Second operand has 51 states, 51 states have (on average 2.9411764705882355) internal successors, (150), 50 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:03,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:03,104 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-04-06 20:09:03,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:09:03,105 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.9411764705882355) internal successors, (150), 50 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-04-06 20:09:03,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:03,105 INFO L225 Difference]: With dead ends: 169 [2022-04-06 20:09:03,105 INFO L226 Difference]: Without dead ends: 161 [2022-04-06 20:09:03,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 306 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3925, Invalid=6377, Unknown=0, NotChecked=0, Total=10302 [2022-04-06 20:09:03,107 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 153 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:03,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 40 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:03,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-04-06 20:09:03,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-04-06 20:09:03,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0193548387096774) internal successors, (158), 155 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:03,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 162 transitions. [2022-04-06 20:09:03,131 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 162 transitions. Word has length 154 [2022-04-06 20:09:03,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:03,131 INFO L478 AbstractCegarLoop]: Abstraction has 160 states and 162 transitions. [2022-04-06 20:09:03,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.9411764705882355) internal successors, (150), 50 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:03,131 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 162 transitions. [2022-04-06 20:09:03,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-04-06 20:09:03,131 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:03,132 INFO L499 BasicCegarLoop]: trace histogram [49, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:03,147 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 20:09:03,332 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-04-06 20:09:03,332 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:03,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:03,332 INFO L85 PathProgramCache]: Analyzing trace with hash -155195519, now seen corresponding path program 95 times [2022-04-06 20:09:03,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:03,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [40443221] [2022-04-06 20:09:03,334 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:03,334 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:03,334 INFO L85 PathProgramCache]: Analyzing trace with hash -155195519, now seen corresponding path program 96 times [2022-04-06 20:09:03,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:03,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146814492] [2022-04-06 20:09:03,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:03,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:04,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:04,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:04,234 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 48 proven. 3480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:04,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:04,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146814492] [2022-04-06 20:09:04,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146814492] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:04,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661091381] [2022-04-06 20:09:04,235 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:04,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:04,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:04,236 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 20:09:04,236 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 20:09:04,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 20:09:04,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:04,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 20:09:04,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 284 proven. 1 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-04-06 20:09:04,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:04,648 INFO L134 CoverageAnalysis]: Checked inductivity of 3528 backedges. 284 proven. 1 refuted. 0 times theorem prover too weak. 3243 trivial. 0 not checked. [2022-04-06 20:09:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661091381] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:04,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 4, 4] total 54 [2022-04-06 20:09:04,649 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [40443221] [2022-04-06 20:09:04,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [40443221] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:04,649 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:04,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:09:04,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359838913] [2022-04-06 20:09:04,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:04,650 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:09:04,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:09:04,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1282, Invalid=1580, Unknown=0, NotChecked=0, Total=2862 [2022-04-06 20:09:04,651 INFO L87 Difference]: Start difference. First operand 160 states and 162 transitions. Second operand has 52 states, 52 states have (on average 2.9423076923076925) internal successors, (153), 51 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:05,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:05,810 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-04-06 20:09:05,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:09:05,811 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9423076923076925) internal successors, (153), 51 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-04-06 20:09:05,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:05,811 INFO L225 Difference]: With dead ends: 172 [2022-04-06 20:09:05,811 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 20:09:05,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1467 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3830, Invalid=6676, Unknown=0, NotChecked=0, Total=10506 [2022-04-06 20:09:05,812 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 156 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:05,812 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 50 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:09:05,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 20:09:05,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-04-06 20:09:05,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.018987341772152) internal successors, (161), 158 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:05,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2022-04-06 20:09:05,845 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 157 [2022-04-06 20:09:05,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:05,845 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2022-04-06 20:09:05,845 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9423076923076925) internal successors, (153), 51 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:05,846 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2022-04-06 20:09:05,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-04-06 20:09:05,847 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:05,847 INFO L499 BasicCegarLoop]: trace histogram [50, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:05,872 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:06,068 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:06,069 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:06,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:06,069 INFO L85 PathProgramCache]: Analyzing trace with hash 119513125, now seen corresponding path program 97 times [2022-04-06 20:09:06,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:06,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [920478854] [2022-04-06 20:09:06,070 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:06,070 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:06,070 INFO L85 PathProgramCache]: Analyzing trace with hash 119513125, now seen corresponding path program 98 times [2022-04-06 20:09:06,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:06,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501571065] [2022-04-06 20:09:06,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:06,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:06,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:06,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:06,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 49 proven. 3626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:09:06,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:06,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501571065] [2022-04-06 20:09:06,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501571065] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:06,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095325141] [2022-04-06 20:09:06,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:06,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:06,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:06,990 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 20:09:06,990 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 20:09:07,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:07,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:07,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:09:07,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:08,860 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 3673 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:09:08,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:10,646 INFO L134 CoverageAnalysis]: Checked inductivity of 3675 backedges. 3673 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 20:09:10,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095325141] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:10,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:10,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 151 [2022-04-06 20:09:10,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:10,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [920478854] [2022-04-06 20:09:10,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [920478854] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:10,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:10,647 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:09:10,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632816544] [2022-04-06 20:09:10,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:10,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:09:10,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:09:10,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6277, Invalid=16373, Unknown=0, NotChecked=0, Total=22650 [2022-04-06 20:09:10,649 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 52 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:12,581 INFO L93 Difference]: Finished difference Result 176 states and 181 transitions. [2022-04-06 20:09:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:09:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 52 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-04-06 20:09:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:12,584 INFO L225 Difference]: With dead ends: 176 [2022-04-06 20:09:12,584 INFO L226 Difference]: Without dead ends: 168 [2022-04-06 20:09:12,586 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13328 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=8927, Invalid=31273, Unknown=0, NotChecked=0, Total=40200 [2022-04-06 20:09:12,587 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:12,587 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 42 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:12,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-04-06 20:09:12,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2022-04-06 20:09:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0186335403726707) internal successors, (164), 161 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 168 transitions. [2022-04-06 20:09:12,610 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 168 transitions. Word has length 160 [2022-04-06 20:09:12,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:12,610 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 168 transitions. [2022-04-06 20:09:12,610 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 52 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:12,610 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 168 transitions. [2022-04-06 20:09:12,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 20:09:12,611 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:12,611 INFO L499 BasicCegarLoop]: trace histogram [51, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:12,635 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 20:09:12,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-04-06 20:09:12,827 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2052027649, now seen corresponding path program 99 times [2022-04-06 20:09:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:12,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [812775587] [2022-04-06 20:09:12,829 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:12,829 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash 2052027649, now seen corresponding path program 100 times [2022-04-06 20:09:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:12,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657700590] [2022-04-06 20:09:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:12,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:12,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:12,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:12,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 296 proven. 1 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2022-04-06 20:09:12,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:12,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657700590] [2022-04-06 20:09:12,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657700590] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:12,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784619030] [2022-04-06 20:09:12,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:12,874 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:12,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:12,875 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 20:09:12,892 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 20:09:12,948 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:12,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:12,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 403 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:09:12,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 1363 proven. 1 refuted. 0 times theorem prover too weak. 2461 trivial. 0 not checked. [2022-04-06 20:09:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 1363 proven. 1 refuted. 0 times theorem prover too weak. 2461 trivial. 0 not checked. [2022-04-06 20:09:13,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784619030] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:13,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:13,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 12, 12] total 21 [2022-04-06 20:09:13,389 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:13,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [812775587] [2022-04-06 20:09:13,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [812775587] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:13,389 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:13,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 20:09:13,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93354654] [2022-04-06 20:09:13,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:13,390 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 20:09:13,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:13,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 20:09:13,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:09:13,397 INFO L87 Difference]: Start difference. First operand 166 states and 168 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 20:09:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:13,448 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-04-06 20:09:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 20:09:13,448 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 163 [2022-04-06 20:09:13,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:13,449 INFO L225 Difference]: With dead ends: 175 [2022-04-06 20:09:13,449 INFO L226 Difference]: Without dead ends: 170 [2022-04-06 20:09:13,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 312 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=218, Invalid=288, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:09:13,450 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:13,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 20 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:13,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-04-06 20:09:13,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2022-04-06 20:09:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 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 20:09:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2022-04-06 20:09:13,478 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 163 [2022-04-06 20:09:13,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:13,478 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2022-04-06 20:09:13,478 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 20:09:13,478 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2022-04-06 20:09:13,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-04-06 20:09:13,479 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:13,479 INFO L499 BasicCegarLoop]: trace histogram [52, 51, 50, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:13,495 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 20:09:13,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-04-06 20:09:13,680 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:13,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:13,680 INFO L85 PathProgramCache]: Analyzing trace with hash 235667623, now seen corresponding path program 101 times [2022-04-06 20:09:13,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:13,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2070109259] [2022-04-06 20:09:13,681 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:13,681 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 235667623, now seen corresponding path program 102 times [2022-04-06 20:09:13,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:13,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219490800] [2022-04-06 20:09:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:13,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:13,734 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 585 proven. 6 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2022-04-06 20:09:13,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:13,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219490800] [2022-04-06 20:09:13,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219490800] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:13,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518983336] [2022-04-06 20:09:13,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:13,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:13,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:13,739 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 20:09:13,741 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 20:09:13,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-04-06 20:09:13,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:13,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 20:09:13,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:13,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 585 proven. 6 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2022-04-06 20:09:13,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3978 backedges. 585 proven. 6 refuted. 0 times theorem prover too weak. 3387 trivial. 0 not checked. [2022-04-06 20:09:14,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518983336] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:14,103 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:14,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 6 [2022-04-06 20:09:14,103 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:14,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2070109259] [2022-04-06 20:09:14,103 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2070109259] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:14,103 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:14,103 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 20:09:14,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29706272] [2022-04-06 20:09:14,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:14,104 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 20:09:14,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:14,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 20:09:14,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 20:09:14,104 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:14,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:14,167 INFO L93 Difference]: Finished difference Result 179 states and 183 transitions. [2022-04-06 20:09:14,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 20:09:14,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-04-06 20:09:14,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:14,168 INFO L225 Difference]: With dead ends: 179 [2022-04-06 20:09:14,168 INFO L226 Difference]: Without dead ends: 174 [2022-04-06 20:09:14,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 336 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:09:14,169 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:14,169 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 21 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:14,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-04-06 20:09:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-04-06 20:09:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-04-06 20:09:14,196 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 166 [2022-04-06 20:09:14,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:14,197 INFO L478 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-04-06 20:09:14,197 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-04-06 20:09:14,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-04-06 20:09:14,198 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:14,198 INFO L499 BasicCegarLoop]: trace histogram [53, 52, 50, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:14,218 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-04-06 20:09:14,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:14,410 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:14,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:14,410 INFO L85 PathProgramCache]: Analyzing trace with hash 1347095361, now seen corresponding path program 103 times [2022-04-06 20:09:14,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:14,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045208563] [2022-04-06 20:09:14,411 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:14,411 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1347095361, now seen corresponding path program 104 times [2022-04-06 20:09:14,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:14,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740325471] [2022-04-06 20:09:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:14,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:14,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:14,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:14,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 868 proven. 17 refuted. 0 times theorem prover too weak. 3249 trivial. 0 not checked. [2022-04-06 20:09:14,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740325471] [2022-04-06 20:09:14,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740325471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:14,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704654066] [2022-04-06 20:09:14,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:14,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:14,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:14,469 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 20:09:14,496 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 20:09:14,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:14,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:14,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:09:14,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 4110 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:09:15,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:16,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4134 backedges. 4110 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-04-06 20:09:16,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704654066] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:16,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:16,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 53, 53] total 101 [2022-04-06 20:09:16,703 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:16,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1045208563] [2022-04-06 20:09:16,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1045208563] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:16,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:16,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 20:09:16,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035813492] [2022-04-06 20:09:16,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:16,704 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 20:09:16,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 20:09:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-04-06 20:09:16,705 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:16,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:16,767 INFO L93 Difference]: Finished difference Result 185 states and 191 transitions. [2022-04-06 20:09:16,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 20:09:16,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-04-06 20:09:16,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:16,768 INFO L225 Difference]: With dead ends: 185 [2022-04-06 20:09:16,768 INFO L226 Difference]: Without dead ends: 180 [2022-04-06 20:09:16,768 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 355 GetRequests, 251 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4943 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=5168, Invalid=5752, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:16,769 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:16,769 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 27 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:16,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-04-06 20:09:16,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2022-04-06 20:09:16,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:16,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-04-06 20:09:16,804 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 169 [2022-04-06 20:09:16,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:16,804 INFO L478 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-04-06 20:09:16,804 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:16,805 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-04-06 20:09:16,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-04-06 20:09:16,805 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:16,805 INFO L499 BasicCegarLoop]: trace histogram [54, 53, 50, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:16,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:17,019 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-04-06 20:09:17,019 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:17,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:17,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1987953255, now seen corresponding path program 105 times [2022-04-06 20:09:17,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:17,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [118433484] [2022-04-06 20:09:17,021 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:17,021 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:17,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1987953255, now seen corresponding path program 106 times [2022-04-06 20:09:17,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:17,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20440623] [2022-04-06 20:09:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:17,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:17,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:17,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:17,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1145 proven. 34 refuted. 0 times theorem prover too weak. 3114 trivial. 0 not checked. [2022-04-06 20:09:17,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20440623] [2022-04-06 20:09:17,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20440623] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408503011] [2022-04-06 20:09:17,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:17,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:17,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:17,092 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 20:09:17,119 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 20:09:17,171 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:17,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:17,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 20:09:17,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1789 proven. 34 refuted. 0 times theorem prover too weak. 2470 trivial. 0 not checked. [2022-04-06 20:09:17,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:17,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4293 backedges. 1789 proven. 34 refuted. 0 times theorem prover too weak. 2470 trivial. 0 not checked. [2022-04-06 20:09:17,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408503011] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:17,582 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:17,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 18 [2022-04-06 20:09:17,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:17,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [118433484] [2022-04-06 20:09:17,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [118433484] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:17,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:17,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 20:09:17,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661195284] [2022-04-06 20:09:17,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:17,582 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 20:09:17,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:17,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 20:09:17,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-04-06 20:09:17,583 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 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 20:09:17,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:17,663 INFO L93 Difference]: Finished difference Result 191 states and 199 transitions. [2022-04-06 20:09:17,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 20:09:17,663 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-04-06 20:09:17,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:17,664 INFO L225 Difference]: With dead ends: 191 [2022-04-06 20:09:17,664 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 20:09:17,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 342 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:09:17,664 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:17,664 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 23 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:17,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 20:09:17,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 176. [2022-04-06 20:09:17,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0350877192982457) internal successors, (177), 171 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 20:09:17,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 181 transitions. [2022-04-06 20:09:17,696 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 181 transitions. Word has length 172 [2022-04-06 20:09:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:17,696 INFO L478 AbstractCegarLoop]: Abstraction has 176 states and 181 transitions. [2022-04-06 20:09:17,696 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 181 transitions. [2022-04-06 20:09:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-04-06 20:09:17,697 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:17,697 INFO L499 BasicCegarLoop]: trace histogram [55, 54, 50, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:17,721 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 20:09:17,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-04-06 20:09:17,921 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:17,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1639124607, now seen corresponding path program 107 times [2022-04-06 20:09:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:17,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [108033003] [2022-04-06 20:09:17,922 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:17,922 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1639124607, now seen corresponding path program 108 times [2022-04-06 20:09:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:17,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659109209] [2022-04-06 20:09:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:17,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:17,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:17,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2022-04-06 20:09:17,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:17,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659109209] [2022-04-06 20:09:17,998 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659109209] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:17,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770729953] [2022-04-06 20:09:17,998 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:17,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:17,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:17,999 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 20:09:18,000 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 20:09:18,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2022-04-06 20:09:18,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:18,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 20:09:18,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2022-04-06 20:09:18,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4455 backedges. 1416 proven. 57 refuted. 0 times theorem prover too weak. 2982 trivial. 0 not checked. [2022-04-06 20:09:18,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770729953] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:18,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:18,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 9 [2022-04-06 20:09:18,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:18,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [108033003] [2022-04-06 20:09:18,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [108033003] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:18,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:18,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 20:09:18,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750551770] [2022-04-06 20:09:18,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:18,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 20:09:18,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:18,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 20:09:18,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-04-06 20:09:18,425 INFO L87 Difference]: Start difference. First operand 176 states and 181 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:18,511 INFO L93 Difference]: Finished difference Result 197 states and 207 transitions. [2022-04-06 20:09:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 20:09:18,511 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-04-06 20:09:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:18,512 INFO L225 Difference]: With dead ends: 197 [2022-04-06 20:09:18,512 INFO L226 Difference]: Without dead ends: 192 [2022-04-06 20:09:18,512 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 360 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:09:18,513 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:18,513 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:18,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-04-06 20:09:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 179. [2022-04-06 20:09:18,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0402298850574712) internal successors, (181), 174 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:18,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 185 transitions. [2022-04-06 20:09:18,551 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 185 transitions. Word has length 175 [2022-04-06 20:09:18,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:18,552 INFO L478 AbstractCegarLoop]: Abstraction has 179 states and 185 transitions. [2022-04-06 20:09:18,552 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:18,552 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 185 transitions. [2022-04-06 20:09:18,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-04-06 20:09:18,553 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:18,553 INFO L499 BasicCegarLoop]: trace histogram [56, 55, 50, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:18,576 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 20:09:18,775 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:18,776 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:18,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1166488615, now seen corresponding path program 109 times [2022-04-06 20:09:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:18,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [182001577] [2022-04-06 20:09:18,777 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:18,777 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:18,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1166488615, now seen corresponding path program 110 times [2022-04-06 20:09:18,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:18,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738350760] [2022-04-06 20:09:18,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:18,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:18,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:18,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 1681 proven. 86 refuted. 0 times theorem prover too weak. 2853 trivial. 0 not checked. [2022-04-06 20:09:18,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738350760] [2022-04-06 20:09:18,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738350760] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:18,851 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130712581] [2022-04-06 20:09:18,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:18,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:18,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:18,852 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 20:09:18,882 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 20:09:18,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:18,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 20:09:18,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 4518 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:09:19,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:20,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4620 backedges. 4518 proven. 86 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 20:09:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130712581] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:20,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:20,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 53, 53] total 98 [2022-04-06 20:09:20,938 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:20,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [182001577] [2022-04-06 20:09:20,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [182001577] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:20,938 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:20,938 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 20:09:20,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353795725] [2022-04-06 20:09:20,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:20,939 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 20:09:20,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:20,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 20:09:20,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-04-06 20:09:20,939 INFO L87 Difference]: Start difference. First operand 179 states and 185 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:21,046 INFO L93 Difference]: Finished difference Result 203 states and 215 transitions. [2022-04-06 20:09:21,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 20:09:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-04-06 20:09:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:21,047 INFO L225 Difference]: With dead ends: 203 [2022-04-06 20:09:21,047 INFO L226 Difference]: Without dead ends: 198 [2022-04-06 20:09:21,048 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 281 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4778 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5036, Invalid=5884, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:21,049 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:21,049 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:21,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-04-06 20:09:21,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 182. [2022-04-06 20:09:21,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0451977401129944) internal successors, (185), 177 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:21,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 189 transitions. [2022-04-06 20:09:21,092 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 189 transitions. Word has length 178 [2022-04-06 20:09:21,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:21,092 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 189 transitions. [2022-04-06 20:09:21,092 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:21,092 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 189 transitions. [2022-04-06 20:09:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-04-06 20:09:21,093 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:21,093 INFO L499 BasicCegarLoop]: trace histogram [57, 56, 50, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:21,115 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 20:09:21,307 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:21,308 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:21,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:21,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1168562239, now seen corresponding path program 111 times [2022-04-06 20:09:21,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:21,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1780740169] [2022-04-06 20:09:21,309 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:21,309 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:21,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1168562239, now seen corresponding path program 112 times [2022-04-06 20:09:21,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:21,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697372449] [2022-04-06 20:09:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:21,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:21,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 1940 proven. 121 refuted. 0 times theorem prover too weak. 2727 trivial. 0 not checked. [2022-04-06 20:09:21,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:21,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697372449] [2022-04-06 20:09:21,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697372449] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:21,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695280300] [2022-04-06 20:09:21,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:21,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:21,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:21,412 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 20:09:21,413 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 20:09:21,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:21,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:21,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:09:21,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:21,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2188 proven. 121 refuted. 0 times theorem prover too weak. 2479 trivial. 0 not checked. [2022-04-06 20:09:21,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 4788 backedges. 2188 proven. 121 refuted. 0 times theorem prover too weak. 2479 trivial. 0 not checked. [2022-04-06 20:09:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695280300] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:21,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 15 [2022-04-06 20:09:21,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1780740169] [2022-04-06 20:09:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1780740169] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:21,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 20:09:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889964999] [2022-04-06 20:09:21,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:21,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 20:09:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 20:09:21,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-04-06 20:09:21,940 INFO L87 Difference]: Start difference. First operand 182 states and 189 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 20:09:22,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:22,059 INFO L93 Difference]: Finished difference Result 209 states and 223 transitions. [2022-04-06 20:09:22,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 20:09:22,059 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 181 [2022-04-06 20:09:22,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:22,060 INFO L225 Difference]: With dead ends: 209 [2022-04-06 20:09:22,060 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 20:09:22,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 372 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2022-04-06 20:09:22,061 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:22,061 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 36 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:22,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 20:09:22,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 185. [2022-04-06 20:09:22,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.05) internal successors, (189), 180 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 20:09:22,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 193 transitions. [2022-04-06 20:09:22,095 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 193 transitions. Word has length 181 [2022-04-06 20:09:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:22,095 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 193 transitions. [2022-04-06 20:09:22,095 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 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 20:09:22,095 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 193 transitions. [2022-04-06 20:09:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-04-06 20:09:22,096 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:22,096 INFO L499 BasicCegarLoop]: trace histogram [58, 57, 50, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:22,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:22,314 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:22,314 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:22,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:22,315 INFO L85 PathProgramCache]: Analyzing trace with hash 916739559, now seen corresponding path program 113 times [2022-04-06 20:09:22,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:22,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960906354] [2022-04-06 20:09:22,316 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:22,316 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 916739559, now seen corresponding path program 114 times [2022-04-06 20:09:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:22,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278040147] [2022-04-06 20:09:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:22,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:22,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:22,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 2193 proven. 162 refuted. 0 times theorem prover too weak. 2604 trivial. 0 not checked. [2022-04-06 20:09:22,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:22,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278040147] [2022-04-06 20:09:22,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278040147] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:22,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898037279] [2022-04-06 20:09:22,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:22,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:22,413 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 20:09:22,443 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 20:09:22,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 47 check-sat command(s) [2022-04-06 20:09:22,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:22,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 20:09:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:22,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 2193 proven. 162 refuted. 0 times theorem prover too weak. 2604 trivial. 0 not checked. [2022-04-06 20:09:22,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:22,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4959 backedges. 2193 proven. 162 refuted. 0 times theorem prover too weak. 2604 trivial. 0 not checked. [2022-04-06 20:09:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898037279] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:22,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 12 [2022-04-06 20:09:22,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:22,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960906354] [2022-04-06 20:09:22,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960906354] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:22,992 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:22,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 20:09:22,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290670774] [2022-04-06 20:09:22,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:22,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 20:09:22,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:22,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 20:09:22,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-04-06 20:09:22,993 INFO L87 Difference]: Start difference. First operand 185 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:23,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:23,119 INFO L93 Difference]: Finished difference Result 215 states and 231 transitions. [2022-04-06 20:09:23,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 20:09:23,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-04-06 20:09:23,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:23,120 INFO L225 Difference]: With dead ends: 215 [2022-04-06 20:09:23,121 INFO L226 Difference]: Without dead ends: 210 [2022-04-06 20:09:23,121 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 384 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-04-06 20:09:23,121 INFO L913 BasicCegarLoop]: 20 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:23,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 32 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-04-06 20:09:23,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 188. [2022-04-06 20:09:23,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0546448087431695) internal successors, (193), 183 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:23,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 197 transitions. [2022-04-06 20:09:23,155 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 197 transitions. Word has length 184 [2022-04-06 20:09:23,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:23,156 INFO L478 AbstractCegarLoop]: Abstraction has 188 states and 197 transitions. [2022-04-06 20:09:23,156 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:23,156 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 197 transitions. [2022-04-06 20:09:23,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-04-06 20:09:23,157 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:23,157 INFO L499 BasicCegarLoop]: trace histogram [59, 58, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:23,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-04-06 20:09:23,362 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-04-06 20:09:23,363 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:23,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:23,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1735634433, now seen corresponding path program 115 times [2022-04-06 20:09:23,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:23,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910113168] [2022-04-06 20:09:23,364 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:23,364 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:23,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1735634433, now seen corresponding path program 116 times [2022-04-06 20:09:23,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:23,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862333608] [2022-04-06 20:09:23,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:23,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 2440 proven. 209 refuted. 0 times theorem prover too weak. 2484 trivial. 0 not checked. [2022-04-06 20:09:23,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862333608] [2022-04-06 20:09:23,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862333608] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:23,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621475480] [2022-04-06 20:09:23,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:23,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:23,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:23,479 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 20:09:23,480 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 20:09:23,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:23,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:23,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 20:09:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 4899 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 20:09:24,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5133 backedges. 4899 proven. 209 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-04-06 20:09:25,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621475480] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:25,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:25,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 53, 53] total 95 [2022-04-06 20:09:25,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:25,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910113168] [2022-04-06 20:09:25,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910113168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:25,488 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:25,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 20:09:25,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111757146] [2022-04-06 20:09:25,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:25,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 20:09:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:25,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 20:09:25,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-04-06 20:09:25,492 INFO L87 Difference]: Start difference. First operand 188 states and 197 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:25,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:25,649 INFO L93 Difference]: Finished difference Result 221 states and 239 transitions. [2022-04-06 20:09:25,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 20:09:25,651 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-04-06 20:09:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:25,652 INFO L225 Difference]: With dead ends: 221 [2022-04-06 20:09:25,652 INFO L226 Difference]: Without dead ends: 216 [2022-04-06 20:09:25,653 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 311 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4604 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4913, Invalid=6007, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:25,653 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:25,653 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:25,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-04-06 20:09:25,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 191. [2022-04-06 20:09:25,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0591397849462365) internal successors, (197), 186 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:25,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 201 transitions. [2022-04-06 20:09:25,692 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 201 transitions. Word has length 187 [2022-04-06 20:09:25,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:25,692 INFO L478 AbstractCegarLoop]: Abstraction has 191 states and 201 transitions. [2022-04-06 20:09:25,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:25,692 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 201 transitions. [2022-04-06 20:09:25,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-04-06 20:09:25,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:25,693 INFO L499 BasicCegarLoop]: trace histogram [60, 59, 50, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:25,712 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 20:09:25,901 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2022-04-06 20:09:25,902 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:25,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:25,902 INFO L85 PathProgramCache]: Analyzing trace with hash 2018584487, now seen corresponding path program 117 times [2022-04-06 20:09:25,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:25,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1350240911] [2022-04-06 20:09:25,903 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:25,903 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 2018584487, now seen corresponding path program 118 times [2022-04-06 20:09:25,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:25,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085419453] [2022-04-06 20:09:25,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:25,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:26,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:26,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 2681 proven. 262 refuted. 0 times theorem prover too weak. 2367 trivial. 0 not checked. [2022-04-06 20:09:26,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:26,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085419453] [2022-04-06 20:09:26,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085419453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:26,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140367352] [2022-04-06 20:09:26,024 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:26,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:26,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:26,025 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 20:09:26,026 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 20:09:26,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:26,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:26,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 20:09:26,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:27,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 5020 proven. 262 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:09:27,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5310 backedges. 5020 proven. 262 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 20:09:27,974 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140367352] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:27,974 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:27,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 53, 53] total 94 [2022-04-06 20:09:27,975 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:27,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1350240911] [2022-04-06 20:09:27,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1350240911] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:27,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:27,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 20:09:27,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444213655] [2022-04-06 20:09:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:27,975 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 20:09:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 20:09:27,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-04-06 20:09:27,976 INFO L87 Difference]: Start difference. First operand 191 states and 201 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 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 20:09:28,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:28,140 INFO L93 Difference]: Finished difference Result 227 states and 247 transitions. [2022-04-06 20:09:28,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 20:09:28,141 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 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 190 [2022-04-06 20:09:28,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:28,142 INFO L225 Difference]: With dead ends: 227 [2022-04-06 20:09:28,142 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 20:09:28,142 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 321 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4544 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=4874, Invalid=6046, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:28,142 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:28,143 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 34 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 20:09:28,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 20:09:28,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 194. [2022-04-06 20:09:28,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0634920634920635) internal successors, (201), 189 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 20:09:28,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 205 transitions. [2022-04-06 20:09:28,188 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 205 transitions. Word has length 190 [2022-04-06 20:09:28,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:28,189 INFO L478 AbstractCegarLoop]: Abstraction has 194 states and 205 transitions. [2022-04-06 20:09:28,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 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 20:09:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 205 transitions. [2022-04-06 20:09:28,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-04-06 20:09:28,189 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:28,190 INFO L499 BasicCegarLoop]: trace histogram [61, 60, 50, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:28,210 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 20:09:28,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-04-06 20:09:28,406 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:28,406 INFO L85 PathProgramCache]: Analyzing trace with hash 362841153, now seen corresponding path program 119 times [2022-04-06 20:09:28,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:28,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [698692627] [2022-04-06 20:09:28,407 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:28,407 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:28,407 INFO L85 PathProgramCache]: Analyzing trace with hash 362841153, now seen corresponding path program 120 times [2022-04-06 20:09:28,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:28,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988079240] [2022-04-06 20:09:28,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:28,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:28,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:28,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 2916 proven. 321 refuted. 0 times theorem prover too weak. 2253 trivial. 0 not checked. [2022-04-06 20:09:28,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:28,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988079240] [2022-04-06 20:09:28,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988079240] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:28,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847780686] [2022-04-06 20:09:28,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:28,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:28,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:28,539 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 20:09:28,541 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 20:09:28,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2022-04-06 20:09:28,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:28,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 63 conjunts are in the unsatisfiable core [2022-04-06 20:09:28,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 5138 proven. 321 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:09:29,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5490 backedges. 5138 proven. 321 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-04-06 20:09:30,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847780686] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:30,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:30,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 53, 53] total 93 [2022-04-06 20:09:30,525 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:30,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [698692627] [2022-04-06 20:09:30,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [698692627] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:30,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:30,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 20:09:30,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207560029] [2022-04-06 20:09:30,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:30,525 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 20:09:30,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:30,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 20:09:30,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-04-06 20:09:30,527 INFO L87 Difference]: Start difference. First operand 194 states and 205 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:30,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:30,706 INFO L93 Difference]: Finished difference Result 233 states and 255 transitions. [2022-04-06 20:09:30,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 20:09:30,707 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-04-06 20:09:30,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:30,708 INFO L225 Difference]: With dead ends: 233 [2022-04-06 20:09:30,708 INFO L226 Difference]: Without dead ends: 228 [2022-04-06 20:09:30,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 331 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4483 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4836, Invalid=6084, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:30,708 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:30,709 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 35 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:30,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-04-06 20:09:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 197. [2022-04-06 20:09:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0677083333333333) internal successors, (205), 192 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 209 transitions. [2022-04-06 20:09:30,750 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 209 transitions. Word has length 193 [2022-04-06 20:09:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:30,750 INFO L478 AbstractCegarLoop]: Abstraction has 197 states and 209 transitions. [2022-04-06 20:09:30,751 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:30,751 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 209 transitions. [2022-04-06 20:09:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-04-06 20:09:30,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:30,752 INFO L499 BasicCegarLoop]: trace histogram [62, 61, 50, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:30,771 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 20:09:30,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:30,963 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1812572519, now seen corresponding path program 121 times [2022-04-06 20:09:30,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975291508] [2022-04-06 20:09:30,965 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:30,965 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:30,965 INFO L85 PathProgramCache]: Analyzing trace with hash 1812572519, now seen corresponding path program 122 times [2022-04-06 20:09:30,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:30,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250822010] [2022-04-06 20:09:30,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:30,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:30,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:31,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:31,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:31,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 3145 proven. 386 refuted. 0 times theorem prover too weak. 2142 trivial. 0 not checked. [2022-04-06 20:09:31,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:31,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250822010] [2022-04-06 20:09:31,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250822010] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:31,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518614520] [2022-04-06 20:09:31,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:31,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:31,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:31,097 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 20:09:31,097 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 20:09:31,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 20:09:31,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 5253 proven. 386 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:09:32,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 5673 backedges. 5253 proven. 386 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-04-06 20:09:33,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518614520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:33,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:33,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 53, 53] total 92 [2022-04-06 20:09:33,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975291508] [2022-04-06 20:09:33,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975291508] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:33,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:33,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 20:09:33,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206587869] [2022-04-06 20:09:33,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:33,033 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 20:09:33,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:33,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 20:09:33,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-04-06 20:09:33,035 INFO L87 Difference]: Start difference. First operand 197 states and 209 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:33,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:33,244 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2022-04-06 20:09:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 20:09:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2022-04-06 20:09:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:33,245 INFO L225 Difference]: With dead ends: 239 [2022-04-06 20:09:33,245 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 20:09:33,246 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 341 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4421 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4799, Invalid=6121, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:33,246 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:33,246 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 51 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 20:09:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 200. [2022-04-06 20:09:33,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0717948717948718) internal successors, (209), 195 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:33,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 213 transitions. [2022-04-06 20:09:33,291 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 213 transitions. Word has length 196 [2022-04-06 20:09:33,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:33,292 INFO L478 AbstractCegarLoop]: Abstraction has 200 states and 213 transitions. [2022-04-06 20:09:33,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:33,292 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 213 transitions. [2022-04-06 20:09:33,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-04-06 20:09:33,293 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:33,293 INFO L499 BasicCegarLoop]: trace histogram [63, 62, 50, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:33,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-04-06 20:09:33,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:33,505 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:33,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:33,505 INFO L85 PathProgramCache]: Analyzing trace with hash 568568449, now seen corresponding path program 123 times [2022-04-06 20:09:33,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:33,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [289353201] [2022-04-06 20:09:33,506 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:33,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:33,506 INFO L85 PathProgramCache]: Analyzing trace with hash 568568449, now seen corresponding path program 124 times [2022-04-06 20:09:33,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:33,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850858225] [2022-04-06 20:09:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:33,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:33,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:33,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 3368 proven. 457 refuted. 0 times theorem prover too weak. 2034 trivial. 0 not checked. [2022-04-06 20:09:33,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:33,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850858225] [2022-04-06 20:09:33,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850858225] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:33,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81218949] [2022-04-06 20:09:33,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:33,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:33,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:33,671 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 20:09:33,673 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 20:09:33,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:33,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:33,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:09:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 5365 proven. 457 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:09:34,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:35,624 INFO L134 CoverageAnalysis]: Checked inductivity of 5859 backedges. 5365 proven. 457 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-04-06 20:09:35,624 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81218949] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:35,624 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:35,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 53, 53] total 91 [2022-04-06 20:09:35,625 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:35,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [289353201] [2022-04-06 20:09:35,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [289353201] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:35,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:35,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 20:09:35,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755383720] [2022-04-06 20:09:35,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:35,625 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 20:09:35,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:35,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 20:09:35,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-04-06 20:09:35,626 INFO L87 Difference]: Start difference. First operand 200 states and 213 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 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 20:09:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:35,840 INFO L93 Difference]: Finished difference Result 245 states and 271 transitions. [2022-04-06 20:09:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 20:09:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 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 199 [2022-04-06 20:09:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:35,841 INFO L225 Difference]: With dead ends: 245 [2022-04-06 20:09:35,841 INFO L226 Difference]: Without dead ends: 240 [2022-04-06 20:09:35,842 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 455 GetRequests, 351 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4358 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4763, Invalid=6157, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:35,842 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:35,842 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 37 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:35,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-04-06 20:09:35,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 203. [2022-04-06 20:09:35,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.0757575757575757) internal successors, (213), 198 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 20:09:35,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 217 transitions. [2022-04-06 20:09:35,902 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 217 transitions. Word has length 199 [2022-04-06 20:09:35,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:35,902 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 217 transitions. [2022-04-06 20:09:35,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 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 20:09:35,902 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 217 transitions. [2022-04-06 20:09:35,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-04-06 20:09:35,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:35,903 INFO L499 BasicCegarLoop]: trace histogram [64, 63, 50, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:35,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-04-06 20:09:36,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-04-06 20:09:36,103 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:36,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:36,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1716116263, now seen corresponding path program 125 times [2022-04-06 20:09:36,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:36,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159543593] [2022-04-06 20:09:36,105 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:36,105 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:36,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1716116263, now seen corresponding path program 126 times [2022-04-06 20:09:36,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:36,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125743423] [2022-04-06 20:09:36,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:36,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:36,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 3585 proven. 534 refuted. 0 times theorem prover too weak. 1929 trivial. 0 not checked. [2022-04-06 20:09:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125743423] [2022-04-06 20:09:36,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125743423] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:36,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175946005] [2022-04-06 20:09:36,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:36,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:36,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:36,274 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 20:09:36,274 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 20:09:36,367 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 63 check-sat command(s) [2022-04-06 20:09:36,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:36,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 20:09:36,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:37,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 5309 proven. 534 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 20:09:37,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:37,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6048 backedges. 5309 proven. 534 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-04-06 20:09:37,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175946005] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:37,606 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:37,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 42, 42] total 68 [2022-04-06 20:09:37,606 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:37,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159543593] [2022-04-06 20:09:37,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159543593] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:37,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:37,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 20:09:37,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065821740] [2022-04-06 20:09:37,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:37,607 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 20:09:37,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:37,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 20:09:37,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:09:37,608 INFO L87 Difference]: Start difference. First operand 203 states and 217 transitions. Second operand has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:37,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:37,834 INFO L93 Difference]: Finished difference Result 251 states and 279 transitions. [2022-04-06 20:09:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 20:09:37,834 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2022-04-06 20:09:37,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:37,835 INFO L225 Difference]: With dead ends: 251 [2022-04-06 20:09:37,835 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 20:09:37,836 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 382 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2858, Invalid=3948, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:09:37,837 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:37,837 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:37,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 20:09:37,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 206. [2022-04-06 20:09:37,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.0796019900497513) internal successors, (217), 201 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:37,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 221 transitions. [2022-04-06 20:09:37,898 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 221 transitions. Word has length 202 [2022-04-06 20:09:37,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:37,899 INFO L478 AbstractCegarLoop]: Abstraction has 206 states and 221 transitions. [2022-04-06 20:09:37,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7777777777777777) internal successors, (68), 17 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:37,899 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 221 transitions. [2022-04-06 20:09:37,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-04-06 20:09:37,899 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:37,900 INFO L499 BasicCegarLoop]: trace histogram [65, 64, 50, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:37,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:38,110 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-04-06 20:09:38,110 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:38,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash 373366977, now seen corresponding path program 127 times [2022-04-06 20:09:38,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:38,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [876464122] [2022-04-06 20:09:38,113 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:38,113 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:38,113 INFO L85 PathProgramCache]: Analyzing trace with hash 373366977, now seen corresponding path program 128 times [2022-04-06 20:09:38,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:38,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041964584] [2022-04-06 20:09:38,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:38,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:38,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:38,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 3796 proven. 617 refuted. 0 times theorem prover too weak. 1827 trivial. 0 not checked. [2022-04-06 20:09:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041964584] [2022-04-06 20:09:38,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041964584] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848093374] [2022-04-06 20:09:38,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:38,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:38,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:38,273 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 20:09:38,273 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 20:09:38,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:38,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 20:09:38,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 5580 proven. 617 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 20:09:39,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:40,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6240 backedges. 5580 proven. 617 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-04-06 20:09:40,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848093374] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:40,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:40,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 53, 53] total 89 [2022-04-06 20:09:40,117 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:40,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [876464122] [2022-04-06 20:09:40,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [876464122] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:40,117 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:40,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 20:09:40,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703683720] [2022-04-06 20:09:40,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:40,117 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 20:09:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:40,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 20:09:40,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-04-06 20:09:40,118 INFO L87 Difference]: Start difference. First operand 206 states and 221 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:40,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:40,384 INFO L93 Difference]: Finished difference Result 257 states and 287 transitions. [2022-04-06 20:09:40,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 20:09:40,384 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-04-06 20:09:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:40,385 INFO L225 Difference]: With dead ends: 257 [2022-04-06 20:09:40,385 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 20:09:40,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 371 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4229 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4694, Invalid=6226, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:40,386 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:40,386 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 20:09:40,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 209. [2022-04-06 20:09:40,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0833333333333333) internal successors, (221), 204 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:40,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 225 transitions. [2022-04-06 20:09:40,443 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 225 transitions. Word has length 205 [2022-04-06 20:09:40,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:40,443 INFO L478 AbstractCegarLoop]: Abstraction has 209 states and 225 transitions. [2022-04-06 20:09:40,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:40,443 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 225 transitions. [2022-04-06 20:09:40,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-04-06 20:09:40,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:40,444 INFO L499 BasicCegarLoop]: trace histogram [66, 65, 50, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:40,467 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 20:09:40,667 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:40,667 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:40,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1854782695, now seen corresponding path program 129 times [2022-04-06 20:09:40,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:40,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1742726321] [2022-04-06 20:09:40,668 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:40,668 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:40,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1854782695, now seen corresponding path program 130 times [2022-04-06 20:09:40,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:40,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880266570] [2022-04-06 20:09:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:40,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:40,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:40,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:40,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 4001 proven. 706 refuted. 0 times theorem prover too weak. 1728 trivial. 0 not checked. [2022-04-06 20:09:40,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880266570] [2022-04-06 20:09:40,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880266570] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:40,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034543539] [2022-04-06 20:09:40,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:40,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:40,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:40,846 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 20:09:40,874 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 20:09:40,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:40,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 20:09:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 5683 proven. 706 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:09:41,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6435 backedges. 5683 proven. 706 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-04-06 20:09:42,656 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034543539] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:42,656 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:42,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 53, 53] total 88 [2022-04-06 20:09:42,657 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:42,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1742726321] [2022-04-06 20:09:42,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1742726321] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:42,657 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:42,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 20:09:42,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154349505] [2022-04-06 20:09:42,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:42,657 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 20:09:42,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 20:09:42,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-04-06 20:09:42,658 INFO L87 Difference]: Start difference. First operand 209 states and 225 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 20:09:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:42,948 INFO L93 Difference]: Finished difference Result 263 states and 295 transitions. [2022-04-06 20:09:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 20:09:42,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 208 [2022-04-06 20:09:42,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:42,949 INFO L225 Difference]: With dead ends: 263 [2022-04-06 20:09:42,949 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 20:09:42,950 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4163 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4661, Invalid=6259, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:42,950 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:42,951 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 55 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 20:09:43,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 212. [2022-04-06 20:09:43,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.0869565217391304) internal successors, (225), 207 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 20:09:43,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 229 transitions. [2022-04-06 20:09:43,037 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 229 transitions. Word has length 208 [2022-04-06 20:09:43,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:43,037 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 229 transitions. [2022-04-06 20:09:43,037 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 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 20:09:43,037 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 229 transitions. [2022-04-06 20:09:43,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-04-06 20:09:43,038 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:43,038 INFO L499 BasicCegarLoop]: trace histogram [67, 66, 50, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:43,056 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 20:09:43,244 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-04-06 20:09:43,244 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:43,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -373496063, now seen corresponding path program 131 times [2022-04-06 20:09:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:43,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1997524249] [2022-04-06 20:09:43,245 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:43,245 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:43,246 INFO L85 PathProgramCache]: Analyzing trace with hash -373496063, now seen corresponding path program 132 times [2022-04-06 20:09:43,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:43,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105774378] [2022-04-06 20:09:43,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:43,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:43,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:43,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:43,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 4200 proven. 801 refuted. 0 times theorem prover too weak. 1632 trivial. 0 not checked. [2022-04-06 20:09:43,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105774378] [2022-04-06 20:09:43,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105774378] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:43,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73659313] [2022-04-06 20:09:43,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:43,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:43,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:43,449 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 20:09:43,451 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 20:09:43,545 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2022-04-06 20:09:43,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:43,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 69 conjunts are in the unsatisfiable core [2022-04-06 20:09:43,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:44,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 5783 proven. 801 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:09:44,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:45,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6633 backedges. 5783 proven. 801 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-04-06 20:09:45,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73659313] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:45,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:45,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 53, 53] total 87 [2022-04-06 20:09:45,268 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:45,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1997524249] [2022-04-06 20:09:45,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1997524249] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:45,268 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:45,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 20:09:45,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887939042] [2022-04-06 20:09:45,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:45,268 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 20:09:45,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:45,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 20:09:45,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-04-06 20:09:45,269 INFO L87 Difference]: Start difference. First operand 212 states and 229 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:45,574 INFO L93 Difference]: Finished difference Result 269 states and 303 transitions. [2022-04-06 20:09:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 20:09:45,574 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-04-06 20:09:45,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:45,575 INFO L225 Difference]: With dead ends: 269 [2022-04-06 20:09:45,575 INFO L226 Difference]: Without dead ends: 264 [2022-04-06 20:09:45,576 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 391 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4096 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4629, Invalid=6291, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:45,576 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:45,576 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 56 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-04-06 20:09:45,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 215. [2022-04-06 20:09:45,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0904761904761904) internal successors, (229), 210 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:45,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 233 transitions. [2022-04-06 20:09:45,677 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 233 transitions. Word has length 211 [2022-04-06 20:09:45,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:45,677 INFO L478 AbstractCegarLoop]: Abstraction has 215 states and 233 transitions. [2022-04-06 20:09:45,678 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 20 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:45,678 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 233 transitions. [2022-04-06 20:09:45,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-04-06 20:09:45,678 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:45,679 INFO L499 BasicCegarLoop]: trace histogram [68, 67, 50, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:45,705 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 20:09:45,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-04-06 20:09:45,897 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:45,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:45,898 INFO L85 PathProgramCache]: Analyzing trace with hash -11448665, now seen corresponding path program 133 times [2022-04-06 20:09:45,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:45,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [59994815] [2022-04-06 20:09:45,899 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:45,899 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:45,899 INFO L85 PathProgramCache]: Analyzing trace with hash -11448665, now seen corresponding path program 134 times [2022-04-06 20:09:45,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:45,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545866471] [2022-04-06 20:09:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:45,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:46,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 4393 proven. 902 refuted. 0 times theorem prover too weak. 1539 trivial. 0 not checked. [2022-04-06 20:09:46,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545866471] [2022-04-06 20:09:46,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545866471] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:46,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506096319] [2022-04-06 20:09:46,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:46,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:46,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:46,102 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 20:09:46,103 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 20:09:46,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:46,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:46,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:09:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 5880 proven. 902 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 20:09:47,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6834 backedges. 5880 proven. 902 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 20:09:47,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506096319] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:47,883 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:47,883 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 53, 53] total 86 [2022-04-06 20:09:47,883 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:47,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [59994815] [2022-04-06 20:09:47,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [59994815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:47,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:47,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 20:09:47,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037148804] [2022-04-06 20:09:47,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:47,884 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 20:09:47,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 20:09:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-04-06 20:09:47,885 INFO L87 Difference]: Start difference. First operand 215 states and 233 transitions. Second operand has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:48,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:48,211 INFO L93 Difference]: Finished difference Result 275 states and 311 transitions. [2022-04-06 20:09:48,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 20:09:48,212 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-04-06 20:09:48,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:48,213 INFO L225 Difference]: With dead ends: 275 [2022-04-06 20:09:48,213 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 20:09:48,213 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 401 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4028 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4598, Invalid=6322, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:48,214 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:48,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 42 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:48,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 20:09:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 218. [2022-04-06 20:09:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 213 states have (on average 1.0938967136150235) internal successors, (233), 213 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:48,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 237 transitions. [2022-04-06 20:09:48,291 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 237 transitions. Word has length 214 [2022-04-06 20:09:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:48,292 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 237 transitions. [2022-04-06 20:09:48,292 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8181818181818183) internal successors, (84), 21 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:48,292 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 237 transitions. [2022-04-06 20:09:48,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-04-06 20:09:48,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:48,292 INFO L499 BasicCegarLoop]: trace histogram [69, 68, 50, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:48,309 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 20:09:48,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-04-06 20:09:48,493 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:48,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1079704897, now seen corresponding path program 135 times [2022-04-06 20:09:48,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:48,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1537282029] [2022-04-06 20:09:48,495 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:48,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1079704897, now seen corresponding path program 136 times [2022-04-06 20:09:48,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:48,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882822068] [2022-04-06 20:09:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:48,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:48,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:48,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 4580 proven. 1009 refuted. 0 times theorem prover too weak. 1449 trivial. 0 not checked. [2022-04-06 20:09:48,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882822068] [2022-04-06 20:09:48,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882822068] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808400447] [2022-04-06 20:09:48,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:48,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:48,715 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 20:09:48,716 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 20:09:48,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:48,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:48,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 71 conjunts are in the unsatisfiable core [2022-04-06 20:09:48,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 5974 proven. 1009 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:09:49,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:50,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7038 backedges. 5974 proven. 1009 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 20:09:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808400447] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:50,445 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:50,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 53, 53] total 85 [2022-04-06 20:09:50,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:50,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1537282029] [2022-04-06 20:09:50,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1537282029] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:50,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:50,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 20:09:50,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475740500] [2022-04-06 20:09:50,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:50,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 20:09:50,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:50,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 20:09:50,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-04-06 20:09:50,446 INFO L87 Difference]: Start difference. First operand 218 states and 237 transitions. Second operand has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 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 20:09:50,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:50,811 INFO L93 Difference]: Finished difference Result 281 states and 319 transitions. [2022-04-06 20:09:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 20:09:50,811 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 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 217 [2022-04-06 20:09:50,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:50,812 INFO L225 Difference]: With dead ends: 281 [2022-04-06 20:09:50,812 INFO L226 Difference]: Without dead ends: 276 [2022-04-06 20:09:50,812 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 515 GetRequests, 411 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3959 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4568, Invalid=6352, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:50,813 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:50,813 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 58 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:50,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-04-06 20:09:50,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 221. [2022-04-06 20:09:50,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0972222222222223) internal successors, (237), 216 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 20:09:50,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 241 transitions. [2022-04-06 20:09:50,895 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 241 transitions. Word has length 217 [2022-04-06 20:09:50,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:50,895 INFO L478 AbstractCegarLoop]: Abstraction has 221 states and 241 transitions. [2022-04-06 20:09:50,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.8260869565217392) internal successors, (88), 22 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 20:09:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 241 transitions. [2022-04-06 20:09:50,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-04-06 20:09:50,896 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:50,896 INFO L499 BasicCegarLoop]: trace histogram [70, 69, 50, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:50,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-04-06 20:09:51,097 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2022-04-06 20:09:51,097 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:51,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:51,098 INFO L85 PathProgramCache]: Analyzing trace with hash -971992985, now seen corresponding path program 137 times [2022-04-06 20:09:51,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:51,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [302528010] [2022-04-06 20:09:51,099 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:51,099 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:51,099 INFO L85 PathProgramCache]: Analyzing trace with hash -971992985, now seen corresponding path program 138 times [2022-04-06 20:09:51,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:51,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681961915] [2022-04-06 20:09:51,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:51,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:51,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:51,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:51,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:51,324 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 4761 proven. 1122 refuted. 0 times theorem prover too weak. 1362 trivial. 0 not checked. [2022-04-06 20:09:51,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:51,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681961915] [2022-04-06 20:09:51,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681961915] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:51,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574323495] [2022-04-06 20:09:51,325 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:51,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:51,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:51,326 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 20:09:51,326 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 20:09:51,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 69 check-sat command(s) [2022-04-06 20:09:51,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 529 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 20:09:51,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 5867 proven. 1122 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 20:09:52,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:52,496 INFO L134 CoverageAnalysis]: Checked inductivity of 7245 backedges. 5867 proven. 1122 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 20:09:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574323495] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:52,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:52,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 41, 41] total 60 [2022-04-06 20:09:52,497 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:52,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [302528010] [2022-04-06 20:09:52,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [302528010] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:52,497 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:52,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 20:09:52,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610955670] [2022-04-06 20:09:52,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:52,498 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 20:09:52,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:52,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 20:09:52,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:09:52,498 INFO L87 Difference]: Start difference. First operand 221 states and 241 transitions. Second operand has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:52,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:52,878 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2022-04-06 20:09:52,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 20:09:52,879 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2022-04-06 20:09:52,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:52,880 INFO L225 Difference]: With dead ends: 287 [2022-04-06 20:09:52,880 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 20:09:52,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 444 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2013 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2595, Invalid=3885, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:09:52,880 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 9 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:52,880 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 39 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 20:09:52,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 224. [2022-04-06 20:09:52,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.1004566210045663) internal successors, (241), 219 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:52,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 245 transitions. [2022-04-06 20:09:52,969 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 245 transitions. Word has length 220 [2022-04-06 20:09:52,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:52,969 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 245 transitions. [2022-04-06 20:09:52,969 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.8333333333333335) internal successors, (92), 23 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 245 transitions. [2022-04-06 20:09:52,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-04-06 20:09:52,970 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:52,970 INFO L499 BasicCegarLoop]: trace histogram [71, 70, 50, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:52,989 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 20:09:53,170 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:53,171 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:53,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:53,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1424006271, now seen corresponding path program 139 times [2022-04-06 20:09:53,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:53,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1836656804] [2022-04-06 20:09:53,172 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:53,172 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:53,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1424006271, now seen corresponding path program 140 times [2022-04-06 20:09:53,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:53,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286254438] [2022-04-06 20:09:53,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:53,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:53,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 4936 proven. 1241 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2022-04-06 20:09:53,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286254438] [2022-04-06 20:09:53,411 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286254438] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:53,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495862535] [2022-04-06 20:09:53,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:09:53,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:53,412 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 20:09:53,435 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 20:09:53,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:09:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:53,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 20:09:53,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:54,470 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 6153 proven. 1241 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:09:54,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 7455 backedges. 6153 proven. 1241 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-04-06 20:09:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495862535] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:55,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:55,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 53, 53] total 83 [2022-04-06 20:09:55,111 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:55,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1836656804] [2022-04-06 20:09:55,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1836656804] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:55,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:55,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 20:09:55,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780809553] [2022-04-06 20:09:55,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:55,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 20:09:55,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:55,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 20:09:55,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-04-06 20:09:55,113 INFO L87 Difference]: Start difference. First operand 224 states and 245 transitions. Second operand has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:55,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:55,552 INFO L93 Difference]: Finished difference Result 293 states and 335 transitions. [2022-04-06 20:09:55,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 20:09:55,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-04-06 20:09:55,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:55,554 INFO L225 Difference]: With dead ends: 293 [2022-04-06 20:09:55,554 INFO L226 Difference]: Without dead ends: 288 [2022-04-06 20:09:55,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 431 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3818 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4511, Invalid=6409, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:55,554 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:55,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:55,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-04-06 20:09:55,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 227. [2022-04-06 20:09:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.1036036036036037) internal successors, (245), 222 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 249 transitions. [2022-04-06 20:09:55,692 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 249 transitions. Word has length 223 [2022-04-06 20:09:55,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:55,692 INFO L478 AbstractCegarLoop]: Abstraction has 227 states and 249 transitions. [2022-04-06 20:09:55,692 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.84) internal successors, (96), 24 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:09:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 249 transitions. [2022-04-06 20:09:55,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-04-06 20:09:55,693 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:55,693 INFO L499 BasicCegarLoop]: trace histogram [72, 71, 50, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:55,718 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 20:09:55,912 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:55,912 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:55,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:55,913 INFO L85 PathProgramCache]: Analyzing trace with hash 1665630759, now seen corresponding path program 141 times [2022-04-06 20:09:55,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:55,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1202831578] [2022-04-06 20:09:55,914 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:55,914 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1665630759, now seen corresponding path program 142 times [2022-04-06 20:09:55,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:55,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795347139] [2022-04-06 20:09:55,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:55,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:55,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:56,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:56,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 5105 proven. 1366 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2022-04-06 20:09:56,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:56,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795347139] [2022-04-06 20:09:56,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795347139] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:56,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972208387] [2022-04-06 20:09:56,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:09:56,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:56,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:56,205 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 20:09:56,206 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 20:09:56,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:09:56,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:56,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 74 conjunts are in the unsatisfiable core [2022-04-06 20:09:56,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:09:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 6238 proven. 1366 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 20:09:57,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:09:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 7668 backedges. 6238 proven. 1366 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 20:09:57,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972208387] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:09:57,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:09:57,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 53, 53] total 82 [2022-04-06 20:09:57,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:09:57,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1202831578] [2022-04-06 20:09:57,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1202831578] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:09:57,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:09:57,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 20:09:57,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663556196] [2022-04-06 20:09:57,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:09:57,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 20:09:57,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:57,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 20:09:57,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-04-06 20:09:57,888 INFO L87 Difference]: Start difference. First operand 227 states and 249 transitions. Second operand has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 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 20:09:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:09:58,344 INFO L93 Difference]: Finished difference Result 299 states and 343 transitions. [2022-04-06 20:09:58,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 20:09:58,345 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 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 226 [2022-04-06 20:09:58,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:09:58,345 INFO L225 Difference]: With dead ends: 299 [2022-04-06 20:09:58,345 INFO L226 Difference]: Without dead ends: 294 [2022-04-06 20:09:58,346 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 441 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3746 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4484, Invalid=6436, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:09:58,346 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:09:58,346 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 61 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:09:58,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-04-06 20:09:58,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 230. [2022-04-06 20:09:58,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.1066666666666667) internal successors, (249), 225 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 20:09:58,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 253 transitions. [2022-04-06 20:09:58,449 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 253 transitions. Word has length 226 [2022-04-06 20:09:58,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:09:58,449 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 253 transitions. [2022-04-06 20:09:58,450 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8461538461538463) internal successors, (100), 25 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 20:09:58,450 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 253 transitions. [2022-04-06 20:09:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-04-06 20:09:58,450 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:09:58,450 INFO L499 BasicCegarLoop]: trace histogram [73, 72, 50, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:09:58,466 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-04-06 20:09:58,651 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:58,651 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:09:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:09:58,651 INFO L85 PathProgramCache]: Analyzing trace with hash -401729087, now seen corresponding path program 143 times [2022-04-06 20:09:58,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:09:58,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1232470031] [2022-04-06 20:09:58,652 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:09:58,652 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:09:58,652 INFO L85 PathProgramCache]: Analyzing trace with hash -401729087, now seen corresponding path program 144 times [2022-04-06 20:09:58,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:09:58,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496827175] [2022-04-06 20:09:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:09:58,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:09:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:58,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:09:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:09:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 5268 proven. 1497 refuted. 0 times theorem prover too weak. 1119 trivial. 0 not checked. [2022-04-06 20:09:58,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:09:58,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496827175] [2022-04-06 20:09:58,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496827175] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:09:58,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326779082] [2022-04-06 20:09:58,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:09:58,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:09:58,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:09:58,965 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 20:09:58,966 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 20:09:59,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2022-04-06 20:09:59,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:09:59,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 557 conjuncts, 75 conjunts are in the unsatisfiable core [2022-04-06 20:09:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:00,032 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 6320 proven. 1497 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:10:00,032 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:00,638 INFO L134 CoverageAnalysis]: Checked inductivity of 7884 backedges. 6320 proven. 1497 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-04-06 20:10:00,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326779082] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:00,638 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:00,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 53, 53] total 81 [2022-04-06 20:10:00,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:00,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1232470031] [2022-04-06 20:10:00,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1232470031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:00,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:00,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 20:10:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933829426] [2022-04-06 20:10:00,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:00,639 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 20:10:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:00,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 20:10:00,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-04-06 20:10:00,640 INFO L87 Difference]: Start difference. First operand 230 states and 253 transitions. Second operand has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 26 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:01,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:01,120 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2022-04-06 20:10:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 20:10:01,121 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 26 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-04-06 20:10:01,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:01,121 INFO L225 Difference]: With dead ends: 305 [2022-04-06 20:10:01,121 INFO L226 Difference]: Without dead ends: 300 [2022-04-06 20:10:01,122 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 451 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3673 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4458, Invalid=6462, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:01,122 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:01,122 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 52 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:01,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-04-06 20:10:01,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 233. [2022-04-06 20:10:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.1096491228070176) internal successors, (253), 228 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 257 transitions. [2022-04-06 20:10:01,232 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 257 transitions. Word has length 229 [2022-04-06 20:10:01,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:01,232 INFO L478 AbstractCegarLoop]: Abstraction has 233 states and 257 transitions. [2022-04-06 20:10:01,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.8518518518518516) internal successors, (104), 26 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:01,232 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 257 transitions. [2022-04-06 20:10:01,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-04-06 20:10:01,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:01,233 INFO L499 BasicCegarLoop]: trace histogram [74, 73, 50, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:01,249 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 20:10:01,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-04-06 20:10:01,434 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:01,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:01,434 INFO L85 PathProgramCache]: Analyzing trace with hash 712123367, now seen corresponding path program 145 times [2022-04-06 20:10:01,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:01,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [340655392] [2022-04-06 20:10:01,435 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:01,435 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:01,435 INFO L85 PathProgramCache]: Analyzing trace with hash 712123367, now seen corresponding path program 146 times [2022-04-06 20:10:01,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:01,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524964100] [2022-04-06 20:10:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:01,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:01,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:01,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:01,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:01,771 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 5425 proven. 1634 refuted. 0 times theorem prover too weak. 1044 trivial. 0 not checked. [2022-04-06 20:10:01,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524964100] [2022-04-06 20:10:01,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524964100] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:01,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519771811] [2022-04-06 20:10:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:01,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:01,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:01,772 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 20:10:01,773 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 20:10:01,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:01,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:01,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 564 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 20:10:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:02,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 6399 proven. 1634 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:10:02,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:03,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8103 backedges. 6399 proven. 1634 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-04-06 20:10:03,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519771811] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:03,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:03,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 53, 53] total 80 [2022-04-06 20:10:03,391 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:03,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [340655392] [2022-04-06 20:10:03,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [340655392] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:03,391 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:03,391 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-04-06 20:10:03,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304320569] [2022-04-06 20:10:03,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:03,391 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-04-06 20:10:03,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:03,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-04-06 20:10:03,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-04-06 20:10:03,392 INFO L87 Difference]: Start difference. First operand 233 states and 257 transitions. Second operand has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:03,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:03,910 INFO L93 Difference]: Finished difference Result 311 states and 359 transitions. [2022-04-06 20:10:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-04-06 20:10:03,910 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2022-04-06 20:10:03,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:03,911 INFO L225 Difference]: With dead ends: 311 [2022-04-06 20:10:03,911 INFO L226 Difference]: Without dead ends: 306 [2022-04-06 20:10:03,911 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 461 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3599 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4433, Invalid=6487, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:03,912 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:03,912 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 48 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-04-06 20:10:04,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 236. [2022-04-06 20:10:04,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.1125541125541125) internal successors, (257), 231 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:04,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 261 transitions. [2022-04-06 20:10:04,032 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 261 transitions. Word has length 232 [2022-04-06 20:10:04,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:04,032 INFO L478 AbstractCegarLoop]: Abstraction has 236 states and 261 transitions. [2022-04-06 20:10:04,032 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.857142857142857) internal successors, (108), 27 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:04,032 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 261 transitions. [2022-04-06 20:10:04,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-04-06 20:10:04,033 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:04,033 INFO L499 BasicCegarLoop]: trace histogram [75, 74, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:04,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:04,233 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:04,234 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:04,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:04,234 INFO L85 PathProgramCache]: Analyzing trace with hash 573251585, now seen corresponding path program 147 times [2022-04-06 20:10:04,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:04,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [794780609] [2022-04-06 20:10:04,235 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:04,235 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:04,235 INFO L85 PathProgramCache]: Analyzing trace with hash 573251585, now seen corresponding path program 148 times [2022-04-06 20:10:04,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:04,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140972224] [2022-04-06 20:10:04,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:04,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:04,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 5576 proven. 1777 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2022-04-06 20:10:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140972224] [2022-04-06 20:10:04,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140972224] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:04,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069245850] [2022-04-06 20:10:04,556 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:04,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:04,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:04,557 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 20:10:04,558 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 20:10:04,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:04,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:04,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 20:10:04,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:05,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 6475 proven. 1777 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 20:10:05,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:06,141 INFO L134 CoverageAnalysis]: Checked inductivity of 8325 backedges. 6475 proven. 1777 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 20:10:06,141 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069245850] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:06,141 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:06,141 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 53, 53] total 79 [2022-04-06 20:10:06,142 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:06,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [794780609] [2022-04-06 20:10:06,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [794780609] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:06,142 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:06,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-04-06 20:10:06,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212100445] [2022-04-06 20:10:06,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:06,142 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-04-06 20:10:06,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:06,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-04-06 20:10:06,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:10:06,143 INFO L87 Difference]: Start difference. First operand 236 states and 261 transitions. Second operand has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 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 20:10:06,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:06,696 INFO L93 Difference]: Finished difference Result 317 states and 367 transitions. [2022-04-06 20:10:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-04-06 20:10:06,696 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 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 235 [2022-04-06 20:10:06,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:06,698 INFO L225 Difference]: With dead ends: 317 [2022-04-06 20:10:06,698 INFO L226 Difference]: Without dead ends: 312 [2022-04-06 20:10:06,698 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 471 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3524 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4409, Invalid=6511, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:06,699 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:06,699 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:06,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-04-06 20:10:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 239. [2022-04-06 20:10:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.1153846153846154) internal successors, (261), 234 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 265 transitions. [2022-04-06 20:10:06,833 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 265 transitions. Word has length 235 [2022-04-06 20:10:06,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:06,833 INFO L478 AbstractCegarLoop]: Abstraction has 239 states and 265 transitions. [2022-04-06 20:10:06,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8620689655172415) internal successors, (112), 28 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 20:10:06,834 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 265 transitions. [2022-04-06 20:10:06,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2022-04-06 20:10:06,834 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:06,834 INFO L499 BasicCegarLoop]: trace histogram [76, 75, 50, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:06,851 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 20:10:07,034 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:07,035 INFO L403 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:07,035 INFO L85 PathProgramCache]: Analyzing trace with hash -502499929, now seen corresponding path program 149 times [2022-04-06 20:10:07,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:07,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [46305934] [2022-04-06 20:10:07,036 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:07,036 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:07,036 INFO L85 PathProgramCache]: Analyzing trace with hash -502499929, now seen corresponding path program 150 times [2022-04-06 20:10:07,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:07,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324539142] [2022-04-06 20:10:07,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:07,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:07,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:07,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:07,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 5721 proven. 1926 refuted. 0 times theorem prover too weak. 903 trivial. 0 not checked. [2022-04-06 20:10:07,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324539142] [2022-04-06 20:10:07,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324539142] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:07,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500138386] [2022-04-06 20:10:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:07,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:07,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:07,377 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 20:10:07,377 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 20:10:07,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 75 check-sat command(s) [2022-04-06 20:10:07,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:07,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 65 conjunts are in the unsatisfiable core [2022-04-06 20:10:07,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:08,026 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 6314 proven. 1926 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-04-06 20:10:08,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:08,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8550 backedges. 6314 proven. 1926 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2022-04-06 20:10:08,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500138386] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:08,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:08,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 40, 40] total 52 [2022-04-06 20:10:08,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:08,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [46305934] [2022-04-06 20:10:08,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [46305934] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:08,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:08,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-04-06 20:10:08,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141886971] [2022-04-06 20:10:08,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:08,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-04-06 20:10:08,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:08,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-04-06 20:10:08,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-04-06 20:10:08,410 INFO L87 Difference]: Start difference. First operand 239 states and 265 transitions. Second operand has 30 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 29 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:09,025 INFO L93 Difference]: Finished difference Result 323 states and 375 transitions. [2022-04-06 20:10:09,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-04-06 20:10:09,025 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 29 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2022-04-06 20:10:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:09,026 INFO L225 Difference]: With dead ends: 323 [2022-04-06 20:10:09,026 INFO L226 Difference]: Without dead ends: 318 [2022-04-06 20:10:09,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 506 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2384, Invalid=3778, Unknown=0, NotChecked=0, Total=6162 [2022-04-06 20:10:09,027 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 372 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:09,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 372 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-04-06 20:10:09,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 242. [2022-04-06 20:10:09,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 237 states have (on average 1.1181434599156117) internal successors, (265), 237 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 269 transitions. [2022-04-06 20:10:09,177 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 269 transitions. Word has length 238 [2022-04-06 20:10:09,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:09,177 INFO L478 AbstractCegarLoop]: Abstraction has 242 states and 269 transitions. [2022-04-06 20:10:09,177 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8666666666666667) internal successors, (116), 29 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:09,177 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 269 transitions. [2022-04-06 20:10:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-04-06 20:10:09,178 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:09,178 INFO L499 BasicCegarLoop]: trace histogram [77, 76, 50, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:09,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-04-06 20:10:09,378 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-04-06 20:10:09,379 INFO L403 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 830109249, now seen corresponding path program 151 times [2022-04-06 20:10:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:09,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [641811875] [2022-04-06 20:10:09,381 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:09,381 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:09,381 INFO L85 PathProgramCache]: Analyzing trace with hash 830109249, now seen corresponding path program 152 times [2022-04-06 20:10:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:09,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414952041] [2022-04-06 20:10:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:09,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 5860 proven. 2081 refuted. 0 times theorem prover too weak. 837 trivial. 0 not checked. [2022-04-06 20:10:09,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:09,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414952041] [2022-04-06 20:10:09,752 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414952041] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:09,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207279500] [2022-04-06 20:10:09,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:09,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:09,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:09,753 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 20:10:09,754 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 20:10:09,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:09,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:09,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 79 conjunts are in the unsatisfiable core [2022-04-06 20:10:09,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:10,735 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6618 proven. 2081 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:10:10,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:11,302 INFO L134 CoverageAnalysis]: Checked inductivity of 8778 backedges. 6618 proven. 2081 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-04-06 20:10:11,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207279500] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:11,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:11,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 53, 53] total 77 [2022-04-06 20:10:11,302 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:11,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [641811875] [2022-04-06 20:10:11,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [641811875] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:11,303 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:11,303 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-04-06 20:10:11,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052246297] [2022-04-06 20:10:11,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:11,303 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-04-06 20:10:11,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:11,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-04-06 20:10:11,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:10:11,304 INFO L87 Difference]: Start difference. First operand 242 states and 269 transitions. Second operand has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 30 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:11,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:11,942 INFO L93 Difference]: Finished difference Result 329 states and 383 transitions. [2022-04-06 20:10:11,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-04-06 20:10:11,943 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 30 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-04-06 20:10:11,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:11,944 INFO L225 Difference]: With dead ends: 329 [2022-04-06 20:10:11,944 INFO L226 Difference]: Without dead ends: 324 [2022-04-06 20:10:11,944 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 491 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3371 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4364, Invalid=6556, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:11,945 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:11,945 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:11,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-04-06 20:10:12,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 245. [2022-04-06 20:10:12,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.1208333333333333) internal successors, (269), 240 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:12,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 273 transitions. [2022-04-06 20:10:12,096 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 273 transitions. Word has length 241 [2022-04-06 20:10:12,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:12,096 INFO L478 AbstractCegarLoop]: Abstraction has 245 states and 273 transitions. [2022-04-06 20:10:12,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.870967741935484) internal successors, (120), 30 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:12,096 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 273 transitions. [2022-04-06 20:10:12,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-04-06 20:10:12,097 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:12,097 INFO L499 BasicCegarLoop]: trace histogram [78, 77, 50, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:12,114 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 20:10:12,297 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-04-06 20:10:12,298 INFO L403 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:12,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2087553177, now seen corresponding path program 153 times [2022-04-06 20:10:12,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:12,298 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [393680494] [2022-04-06 20:10:12,299 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:12,299 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:12,299 INFO L85 PathProgramCache]: Analyzing trace with hash -2087553177, now seen corresponding path program 154 times [2022-04-06 20:10:12,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:12,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080429669] [2022-04-06 20:10:12,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:12,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:12,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:12,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:12,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 5993 proven. 2242 refuted. 0 times theorem prover too weak. 774 trivial. 0 not checked. [2022-04-06 20:10:12,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:12,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080429669] [2022-04-06 20:10:12,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080429669] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:12,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626189240] [2022-04-06 20:10:12,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:12,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:12,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:12,672 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 20:10:12,673 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 20:10:12,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:12,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 592 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 20:10:12,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 6685 proven. 2242 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 20:10:13,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9009 backedges. 6685 proven. 2242 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2022-04-06 20:10:14,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626189240] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:14,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:14,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 53, 53] total 76 [2022-04-06 20:10:14,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:14,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [393680494] [2022-04-06 20:10:14,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [393680494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:14,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:14,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-04-06 20:10:14,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070832577] [2022-04-06 20:10:14,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:14,167 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-04-06 20:10:14,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:14,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-04-06 20:10:14,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-04-06 20:10:14,168 INFO L87 Difference]: Start difference. First operand 245 states and 273 transitions. Second operand has 32 states, 32 states have (on average 3.875) internal successors, (124), 31 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 20:10:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:14,847 INFO L93 Difference]: Finished difference Result 335 states and 391 transitions. [2022-04-06 20:10:14,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-04-06 20:10:14,847 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 31 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 244 [2022-04-06 20:10:14,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:14,848 INFO L225 Difference]: With dead ends: 335 [2022-04-06 20:10:14,848 INFO L226 Difference]: Without dead ends: 330 [2022-04-06 20:10:14,848 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 501 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3293 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4343, Invalid=6577, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:14,849 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:14,849 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:10:14,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-04-06 20:10:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 248. [2022-04-06 20:10:15,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 243 states have (on average 1.123456790123457) internal successors, (273), 243 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 277 transitions. [2022-04-06 20:10:15,019 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 277 transitions. Word has length 244 [2022-04-06 20:10:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:15,020 INFO L478 AbstractCegarLoop]: Abstraction has 248 states and 277 transitions. [2022-04-06 20:10:15,020 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.875) internal successors, (124), 31 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 20:10:15,020 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 277 transitions. [2022-04-06 20:10:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-04-06 20:10:15,021 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:15,021 INFO L499 BasicCegarLoop]: trace histogram [79, 78, 50, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:15,046 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 20:10:15,239 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:15,239 INFO L403 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:15,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:15,240 INFO L85 PathProgramCache]: Analyzing trace with hash -620749695, now seen corresponding path program 155 times [2022-04-06 20:10:15,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:15,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [710694757] [2022-04-06 20:10:15,241 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:15,241 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash -620749695, now seen corresponding path program 156 times [2022-04-06 20:10:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:15,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468738453] [2022-04-06 20:10:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:15,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:15,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:15,716 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 6120 proven. 2409 refuted. 0 times theorem prover too weak. 714 trivial. 0 not checked. [2022-04-06 20:10:15,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468738453] [2022-04-06 20:10:15,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468738453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:15,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858116929] [2022-04-06 20:10:15,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:15,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:15,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:15,717 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 20:10:15,718 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 20:10:15,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2022-04-06 20:10:15,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:15,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 81 conjunts are in the unsatisfiable core [2022-04-06 20:10:15,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:16,803 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 6749 proven. 2409 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 20:10:16,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:17,362 INFO L134 CoverageAnalysis]: Checked inductivity of 9243 backedges. 6749 proven. 2409 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 20:10:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858116929] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:17,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:17,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 53, 53] total 75 [2022-04-06 20:10:17,363 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:17,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [710694757] [2022-04-06 20:10:17,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [710694757] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:17,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:17,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-04-06 20:10:17,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532078354] [2022-04-06 20:10:17,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:17,364 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-04-06 20:10:17,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:17,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-04-06 20:10:17,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-04-06 20:10:17,364 INFO L87 Difference]: Start difference. First operand 248 states and 277 transitions. Second operand has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 32 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:18,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:18,097 INFO L93 Difference]: Finished difference Result 341 states and 399 transitions. [2022-04-06 20:10:18,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-04-06 20:10:18,098 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 32 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-04-06 20:10:18,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:18,099 INFO L225 Difference]: With dead ends: 341 [2022-04-06 20:10:18,099 INFO L226 Difference]: Without dead ends: 336 [2022-04-06 20:10:18,100 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 511 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3214 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4323, Invalid=6597, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:18,100 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:18,100 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:18,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-04-06 20:10:18,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 251. [2022-04-06 20:10:18,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.1260162601626016) internal successors, (277), 246 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:18,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 281 transitions. [2022-04-06 20:10:18,286 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 281 transitions. Word has length 247 [2022-04-06 20:10:18,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:18,287 INFO L478 AbstractCegarLoop]: Abstraction has 251 states and 281 transitions. [2022-04-06 20:10:18,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.878787878787879) internal successors, (128), 32 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:18,287 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 281 transitions. [2022-04-06 20:10:18,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-04-06 20:10:18,288 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:18,288 INFO L499 BasicCegarLoop]: trace histogram [80, 79, 50, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:18,308 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 20:10:18,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:18,499 INFO L403 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash -75486937, now seen corresponding path program 157 times [2022-04-06 20:10:18,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1777056549] [2022-04-06 20:10:18,501 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:18,501 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:18,501 INFO L85 PathProgramCache]: Analyzing trace with hash -75486937, now seen corresponding path program 158 times [2022-04-06 20:10:18,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:18,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281063742] [2022-04-06 20:10:18,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:18,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:18,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:18,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 6241 proven. 2582 refuted. 0 times theorem prover too weak. 657 trivial. 0 not checked. [2022-04-06 20:10:18,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281063742] [2022-04-06 20:10:18,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281063742] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:18,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849149737] [2022-04-06 20:10:18,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:18,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:18,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:18,918 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 20:10:18,919 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 20:10:18,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:18,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:18,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 20:10:19,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:19,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 6810 proven. 2582 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:10:19,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:20,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9480 backedges. 6810 proven. 2582 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-04-06 20:10:20,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849149737] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:20,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:20,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 53, 53] total 74 [2022-04-06 20:10:20,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:20,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1777056549] [2022-04-06 20:10:20,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1777056549] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:20,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:20,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-04-06 20:10:20,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490584995] [2022-04-06 20:10:20,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:20,384 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-04-06 20:10:20,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:20,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-04-06 20:10:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-04-06 20:10:20,385 INFO L87 Difference]: Start difference. First operand 251 states and 281 transitions. Second operand has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:21,178 INFO L93 Difference]: Finished difference Result 347 states and 407 transitions. [2022-04-06 20:10:21,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-04-06 20:10:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-04-06 20:10:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:21,180 INFO L225 Difference]: With dead ends: 347 [2022-04-06 20:10:21,181 INFO L226 Difference]: Without dead ends: 342 [2022-04-06 20:10:21,181 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 521 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3134 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4304, Invalid=6616, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:21,182 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:21,182 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-04-06 20:10:21,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 254. [2022-04-06 20:10:21,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 249 states have (on average 1.1285140562248996) internal successors, (281), 249 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:21,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 285 transitions. [2022-04-06 20:10:21,393 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 285 transitions. Word has length 250 [2022-04-06 20:10:21,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:21,393 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 285 transitions. [2022-04-06 20:10:21,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8823529411764706) internal successors, (132), 33 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:21,393 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 285 transitions. [2022-04-06 20:10:21,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-04-06 20:10:21,394 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:21,394 INFO L499 BasicCegarLoop]: trace histogram [81, 80, 50, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:21,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-04-06 20:10:21,594 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-04-06 20:10:21,594 INFO L403 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:21,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash 281023169, now seen corresponding path program 159 times [2022-04-06 20:10:21,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:21,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1342685368] [2022-04-06 20:10:21,596 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:21,596 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:21,596 INFO L85 PathProgramCache]: Analyzing trace with hash 281023169, now seen corresponding path program 160 times [2022-04-06 20:10:21,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:21,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574073539] [2022-04-06 20:10:21,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:21,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:22,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:22,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:22,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 6356 proven. 2761 refuted. 0 times theorem prover too weak. 603 trivial. 0 not checked. [2022-04-06 20:10:22,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:22,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574073539] [2022-04-06 20:10:22,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574073539] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:22,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896310913] [2022-04-06 20:10:22,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:22,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:22,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:22,038 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 20:10:22,038 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 20:10:22,118 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:22,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:22,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 20:10:22,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 6868 proven. 2761 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:10:23,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9720 backedges. 6868 proven. 2761 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 20:10:23,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896310913] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:23,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:23,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 53, 53] total 73 [2022-04-06 20:10:23,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:23,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1342685368] [2022-04-06 20:10:23,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1342685368] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:23,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:23,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-04-06 20:10:23,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733062244] [2022-04-06 20:10:23,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:23,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-04-06 20:10:23,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:23,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-04-06 20:10:23,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-04-06 20:10:23,581 INFO L87 Difference]: Start difference. First operand 254 states and 285 transitions. Second operand has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 34 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 20:10:24,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:24,447 INFO L93 Difference]: Finished difference Result 353 states and 415 transitions. [2022-04-06 20:10:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-04-06 20:10:24,448 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 34 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 253 [2022-04-06 20:10:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:24,449 INFO L225 Difference]: With dead ends: 353 [2022-04-06 20:10:24,449 INFO L226 Difference]: Without dead ends: 348 [2022-04-06 20:10:24,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 531 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3053 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4286, Invalid=6634, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:24,449 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 9 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:24,449 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 85 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:24,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2022-04-06 20:10:24,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 257. [2022-04-06 20:10:24,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.130952380952381) internal successors, (285), 252 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:24,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 289 transitions. [2022-04-06 20:10:24,680 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 289 transitions. Word has length 253 [2022-04-06 20:10:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:24,681 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 289 transitions. [2022-04-06 20:10:24,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.8857142857142857) internal successors, (136), 34 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 20:10:24,681 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 289 transitions. [2022-04-06 20:10:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-04-06 20:10:24,682 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:24,682 INFO L499 BasicCegarLoop]: trace histogram [82, 81, 50, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:24,704 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 20:10:24,899 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:24,899 INFO L403 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:24,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:24,899 INFO L85 PathProgramCache]: Analyzing trace with hash -380531993, now seen corresponding path program 161 times [2022-04-06 20:10:24,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:24,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1144918871] [2022-04-06 20:10:24,900 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:24,900 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash -380531993, now seen corresponding path program 162 times [2022-04-06 20:10:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:24,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360128347] [2022-04-06 20:10:24,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:24,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:25,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 6465 proven. 2946 refuted. 0 times theorem prover too weak. 552 trivial. 0 not checked. [2022-04-06 20:10:25,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360128347] [2022-04-06 20:10:25,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360128347] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:25,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413346284] [2022-04-06 20:10:25,352 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:25,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:25,353 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 20:10:25,353 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 20:10:25,469 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 81 check-sat command(s) [2022-04-06 20:10:25,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:25,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 613 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 20:10:25,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:25,915 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 6650 proven. 2946 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-04-06 20:10:25,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9963 backedges. 6650 proven. 2946 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-04-06 20:10:26,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413346284] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:26,286 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:26,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 39, 39] total 44 [2022-04-06 20:10:26,286 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1144918871] [2022-04-06 20:10:26,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1144918871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:26,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:26,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-04-06 20:10:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47430254] [2022-04-06 20:10:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:26,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-04-06 20:10:26,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:26,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-04-06 20:10:26,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 20:10:26,287 INFO L87 Difference]: Start difference. First operand 257 states and 289 transitions. Second operand has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 35 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:27,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:27,166 INFO L93 Difference]: Finished difference Result 359 states and 423 transitions. [2022-04-06 20:10:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-04-06 20:10:27,166 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 35 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-04-06 20:10:27,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:27,167 INFO L225 Difference]: With dead ends: 359 [2022-04-06 20:10:27,167 INFO L226 Difference]: Without dead ends: 354 [2022-04-06 20:10:27,168 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 568 SyntacticMatches, 2 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1015 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=2225, Invalid=3627, Unknown=0, NotChecked=0, Total=5852 [2022-04-06 20:10:27,168 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:27,168 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 76 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2022-04-06 20:10:27,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 260. [2022-04-06 20:10:27,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.1333333333333333) internal successors, (289), 255 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:27,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 293 transitions. [2022-04-06 20:10:27,418 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 293 transitions. Word has length 256 [2022-04-06 20:10:27,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:27,419 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 293 transitions. [2022-04-06 20:10:27,419 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.888888888888889) internal successors, (140), 35 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:27,419 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 293 transitions. [2022-04-06 20:10:27,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-04-06 20:10:27,419 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:27,419 INFO L499 BasicCegarLoop]: trace histogram [83, 82, 50, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:27,435 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 20:10:27,620 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:27,620 INFO L403 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:27,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:27,620 INFO L85 PathProgramCache]: Analyzing trace with hash 834558209, now seen corresponding path program 163 times [2022-04-06 20:10:27,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:27,620 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1438518282] [2022-04-06 20:10:27,621 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:27,622 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:27,622 INFO L85 PathProgramCache]: Analyzing trace with hash 834558209, now seen corresponding path program 164 times [2022-04-06 20:10:27,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:27,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892483573] [2022-04-06 20:10:27,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:27,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:28,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:28,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10209 backedges. 6568 proven. 3137 refuted. 0 times theorem prover too weak. 504 trivial. 0 not checked. [2022-04-06 20:10:28,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:28,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892483573] [2022-04-06 20:10:28,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892483573] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:28,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990162578] [2022-04-06 20:10:28,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:28,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:28,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:28,150 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 20:10:28,150 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 20:10:28,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:28,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:28,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 20:10:28,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:29,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10209 backedges. 6975 proven. 3137 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:10:29,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:29,590 INFO L134 CoverageAnalysis]: Checked inductivity of 10209 backedges. 6975 proven. 3137 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-04-06 20:10:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990162578] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:29,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:29,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 53, 53] total 71 [2022-04-06 20:10:29,590 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:29,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1438518282] [2022-04-06 20:10:29,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1438518282] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:29,591 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:29,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-04-06 20:10:29,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607117487] [2022-04-06 20:10:29,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:29,591 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-04-06 20:10:29,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:29,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-04-06 20:10:29,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-04-06 20:10:29,592 INFO L87 Difference]: Start difference. First operand 260 states and 293 transitions. Second operand has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 36 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:30,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:30,506 INFO L93 Difference]: Finished difference Result 365 states and 431 transitions. [2022-04-06 20:10:30,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-04-06 20:10:30,507 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 36 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-04-06 20:10:30,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:30,508 INFO L225 Difference]: With dead ends: 365 [2022-04-06 20:10:30,508 INFO L226 Difference]: Without dead ends: 360 [2022-04-06 20:10:30,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 655 GetRequests, 551 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4253, Invalid=6667, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:30,508 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:30,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 72 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:30,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-04-06 20:10:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 263. [2022-04-06 20:10:30,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.1356589147286822) internal successors, (293), 258 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:30,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 297 transitions. [2022-04-06 20:10:30,750 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 297 transitions. Word has length 259 [2022-04-06 20:10:30,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:30,750 INFO L478 AbstractCegarLoop]: Abstraction has 263 states and 297 transitions. [2022-04-06 20:10:30,750 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.891891891891892) internal successors, (144), 36 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:30,750 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 297 transitions. [2022-04-06 20:10:30,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-04-06 20:10:30,751 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:30,751 INFO L499 BasicCegarLoop]: trace histogram [84, 83, 50, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:30,767 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 20:10:30,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-04-06 20:10:30,951 INFO L403 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1602395303, now seen corresponding path program 165 times [2022-04-06 20:10:30,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [671185848] [2022-04-06 20:10:30,953 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:30,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:30,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1602395303, now seen corresponding path program 166 times [2022-04-06 20:10:30,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:30,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036655575] [2022-04-06 20:10:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:30,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:31,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:31,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:31,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 6665 proven. 3334 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-04-06 20:10:31,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036655575] [2022-04-06 20:10:31,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036655575] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:31,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829734427] [2022-04-06 20:10:31,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:31,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:31,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:31,494 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 20:10:31,495 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 20:10:31,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:31,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:31,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 86 conjunts are in the unsatisfiable core [2022-04-06 20:10:31,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 7024 proven. 3334 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 20:10:32,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10458 backedges. 7024 proven. 3334 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 20:10:32,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829734427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:32,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:32,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 53, 53] total 70 [2022-04-06 20:10:32,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:32,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [671185848] [2022-04-06 20:10:32,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [671185848] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:32,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:32,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-04-06 20:10:32,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497023883] [2022-04-06 20:10:32,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:32,867 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-04-06 20:10:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-04-06 20:10:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-04-06 20:10:32,868 INFO L87 Difference]: Start difference. First operand 263 states and 297 transitions. Second operand has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 37 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 20:10:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:33,831 INFO L93 Difference]: Finished difference Result 371 states and 439 transitions. [2022-04-06 20:10:33,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-04-06 20:10:33,831 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 37 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 262 [2022-04-06 20:10:33,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:33,832 INFO L225 Difference]: With dead ends: 371 [2022-04-06 20:10:33,832 INFO L226 Difference]: Without dead ends: 366 [2022-04-06 20:10:33,833 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 665 GetRequests, 561 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2804 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4238, Invalid=6682, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:33,833 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:33,834 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 63 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:33,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-04-06 20:10:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 266. [2022-04-06 20:10:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.1379310344827587) internal successors, (297), 261 states have internal predecessors, (297), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 301 transitions. [2022-04-06 20:10:34,107 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 301 transitions. Word has length 262 [2022-04-06 20:10:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:34,107 INFO L478 AbstractCegarLoop]: Abstraction has 266 states and 301 transitions. [2022-04-06 20:10:34,107 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8947368421052633) internal successors, (148), 37 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 20:10:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 301 transitions. [2022-04-06 20:10:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-04-06 20:10:34,108 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:34,108 INFO L499 BasicCegarLoop]: trace histogram [85, 84, 50, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:34,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-04-06 20:10:34,308 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:34,310 INFO L403 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:34,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1241444161, now seen corresponding path program 167 times [2022-04-06 20:10:34,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:34,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [209237431] [2022-04-06 20:10:34,311 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:34,311 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:34,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1241444161, now seen corresponding path program 168 times [2022-04-06 20:10:34,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:34,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98185053] [2022-04-06 20:10:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:34,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:34,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:34,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:34,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10710 backedges. 6756 proven. 3537 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-04-06 20:10:34,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98185053] [2022-04-06 20:10:34,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98185053] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:34,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726398682] [2022-04-06 20:10:34,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:34,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:34,844 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 20:10:34,846 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 20:10:34,969 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2022-04-06 20:10:34,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:34,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 641 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 20:10:34,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:35,736 INFO L134 CoverageAnalysis]: Checked inductivity of 10710 backedges. 7070 proven. 3537 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 20:10:35,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10710 backedges. 7070 proven. 3537 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-04-06 20:10:36,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726398682] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:36,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:36,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 53, 53] total 69 [2022-04-06 20:10:36,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:36,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [209237431] [2022-04-06 20:10:36,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [209237431] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:36,230 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:36,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-04-06 20:10:36,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928390908] [2022-04-06 20:10:36,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:36,230 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-04-06 20:10:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:36,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-04-06 20:10:36,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-04-06 20:10:36,231 INFO L87 Difference]: Start difference. First operand 266 states and 301 transitions. Second operand has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 38 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:37,266 INFO L93 Difference]: Finished difference Result 377 states and 447 transitions. [2022-04-06 20:10:37,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-04-06 20:10:37,267 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 38 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-04-06 20:10:37,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:37,269 INFO L225 Difference]: With dead ends: 377 [2022-04-06 20:10:37,269 INFO L226 Difference]: Without dead ends: 372 [2022-04-06 20:10:37,269 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 571 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2719 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=4224, Invalid=6696, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:37,270 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 480 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:37,270 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 69 Invalid, 480 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:37,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-04-06 20:10:37,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 269. [2022-04-06 20:10:37,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.1401515151515151) internal successors, (301), 264 states have internal predecessors, (301), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:37,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 305 transitions. [2022-04-06 20:10:37,571 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 305 transitions. Word has length 265 [2022-04-06 20:10:37,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:37,571 INFO L478 AbstractCegarLoop]: Abstraction has 269 states and 305 transitions. [2022-04-06 20:10:37,572 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.8974358974358974) internal successors, (152), 38 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:37,572 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 305 transitions. [2022-04-06 20:10:37,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-04-06 20:10:37,572 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:37,572 INFO L499 BasicCegarLoop]: trace histogram [86, 85, 50, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:37,589 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 20:10:37,773 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:37,773 INFO L403 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:37,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:37,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1550885273, now seen corresponding path program 169 times [2022-04-06 20:10:37,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:37,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1960396098] [2022-04-06 20:10:37,774 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:37,774 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:37,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1550885273, now seen corresponding path program 170 times [2022-04-06 20:10:37,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:37,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019294466] [2022-04-06 20:10:37,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:37,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:37,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:38,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:38,350 INFO L134 CoverageAnalysis]: Checked inductivity of 10965 backedges. 6841 proven. 3746 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 20:10:38,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:38,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019294466] [2022-04-06 20:10:38,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019294466] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:38,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562781989] [2022-04-06 20:10:38,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:38,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:38,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:38,352 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 20:10:38,353 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 20:10:38,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:38,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:38,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 648 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 20:10:38,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 10965 backedges. 7113 proven. 3746 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:10:39,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:39,674 INFO L134 CoverageAnalysis]: Checked inductivity of 10965 backedges. 7113 proven. 3746 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 20:10:39,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562781989] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:39,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:39,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 53, 53] total 68 [2022-04-06 20:10:39,674 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:39,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1960396098] [2022-04-06 20:10:39,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1960396098] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:39,675 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:39,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-04-06 20:10:39,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013933400] [2022-04-06 20:10:39,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:39,675 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-04-06 20:10:39,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:39,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-04-06 20:10:39,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-04-06 20:10:39,676 INFO L87 Difference]: Start difference. First operand 269 states and 305 transitions. Second operand has 40 states, 40 states have (on average 3.9) internal successors, (156), 39 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:41,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:41,112 INFO L93 Difference]: Finished difference Result 383 states and 455 transitions. [2022-04-06 20:10:41,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-04-06 20:10:41,112 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.9) internal successors, (156), 39 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-04-06 20:10:41,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:41,114 INFO L225 Difference]: With dead ends: 383 [2022-04-06 20:10:41,114 INFO L226 Difference]: Without dead ends: 378 [2022-04-06 20:10:41,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 581 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2633 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4211, Invalid=6709, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:41,114 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:41,114 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-04-06 20:10:41,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 272. [2022-04-06 20:10:41,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.142322097378277) internal successors, (305), 267 states have internal predecessors, (305), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:41,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 309 transitions. [2022-04-06 20:10:41,432 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 309 transitions. Word has length 268 [2022-04-06 20:10:41,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:41,432 INFO L478 AbstractCegarLoop]: Abstraction has 272 states and 309 transitions. [2022-04-06 20:10:41,432 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.9) internal successors, (156), 39 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:41,433 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 309 transitions. [2022-04-06 20:10:41,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-04-06 20:10:41,433 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:41,433 INFO L499 BasicCegarLoop]: trace histogram [87, 86, 50, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:41,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-04-06 20:10:41,633 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-04-06 20:10:41,634 INFO L403 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:41,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:41,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1384502657, now seen corresponding path program 171 times [2022-04-06 20:10:41,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:41,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [195749604] [2022-04-06 20:10:41,635 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:41,635 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:41,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1384502657, now seen corresponding path program 172 times [2022-04-06 20:10:41,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:41,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476035958] [2022-04-06 20:10:41,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:41,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:42,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:42,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 11223 backedges. 6920 proven. 3961 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-04-06 20:10:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:42,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476035958] [2022-04-06 20:10:42,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476035958] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:42,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602649967] [2022-04-06 20:10:42,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:42,230 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:42,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-04-06 20:10:42,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:42,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 655 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 20:10:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:43,069 INFO L134 CoverageAnalysis]: Checked inductivity of 11223 backedges. 7153 proven. 3961 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:10:43,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 11223 backedges. 7153 proven. 3961 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-04-06 20:10:43,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602649967] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:43,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:43,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 53, 53] total 67 [2022-04-06 20:10:43,555 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:43,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [195749604] [2022-04-06 20:10:43,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [195749604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:43,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:43,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-04-06 20:10:43,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125714617] [2022-04-06 20:10:43,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:43,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-04-06 20:10:43,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:43,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-04-06 20:10:43,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-04-06 20:10:43,557 INFO L87 Difference]: Start difference. First operand 272 states and 309 transitions. Second operand has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 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 20:10:44,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:44,738 INFO L93 Difference]: Finished difference Result 389 states and 463 transitions. [2022-04-06 20:10:44,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-04-06 20:10:44,738 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 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 271 [2022-04-06 20:10:44,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:44,739 INFO L225 Difference]: With dead ends: 389 [2022-04-06 20:10:44,739 INFO L226 Difference]: Without dead ends: 384 [2022-04-06 20:10:44,740 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 591 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2546 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4199, Invalid=6721, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:44,740 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:44,740 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 66 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:44,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-04-06 20:10:45,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 275. [2022-04-06 20:10:45,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 313 transitions. [2022-04-06 20:10:45,074 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 313 transitions. Word has length 271 [2022-04-06 20:10:45,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:45,074 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 313 transitions. [2022-04-06 20:10:45,075 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.902439024390244) internal successors, (160), 40 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 20:10:45,075 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 313 transitions. [2022-04-06 20:10:45,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-04-06 20:10:45,075 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:45,075 INFO L499 BasicCegarLoop]: trace histogram [88, 87, 50, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:45,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:45,276 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:45,276 INFO L403 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:45,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -302788569, now seen corresponding path program 173 times [2022-04-06 20:10:45,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:45,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655198657] [2022-04-06 20:10:45,277 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:45,277 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:45,277 INFO L85 PathProgramCache]: Analyzing trace with hash -302788569, now seen corresponding path program 174 times [2022-04-06 20:10:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:45,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662635804] [2022-04-06 20:10:45,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:45,919 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 6993 proven. 4182 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2022-04-06 20:10:45,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662635804] [2022-04-06 20:10:45,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662635804] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:45,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130945762] [2022-04-06 20:10:45,919 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:45,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:45,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:45,920 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:45,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-04-06 20:10:46,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 88 check-sat command(s) [2022-04-06 20:10:46,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:46,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 20:10:46,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 7190 proven. 4182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:10:46,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11484 backedges. 7190 proven. 4182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 20:10:47,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130945762] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:47,248 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 53, 53] total 66 [2022-04-06 20:10:47,248 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:47,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655198657] [2022-04-06 20:10:47,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655198657] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:47,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:47,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-04-06 20:10:47,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498278429] [2022-04-06 20:10:47,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:47,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-04-06 20:10:47,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:47,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-04-06 20:10:47,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-04-06 20:10:47,249 INFO L87 Difference]: Start difference. First operand 275 states and 313 transitions. Second operand has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 41 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:48,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:48,504 INFO L93 Difference]: Finished difference Result 395 states and 471 transitions. [2022-04-06 20:10:48,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-04-06 20:10:48,504 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 41 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-04-06 20:10:48,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:48,505 INFO L225 Difference]: With dead ends: 395 [2022-04-06 20:10:48,505 INFO L226 Difference]: Without dead ends: 390 [2022-04-06 20:10:48,506 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 705 GetRequests, 601 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2458 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4188, Invalid=6732, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:48,506 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:48,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:48,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-04-06 20:10:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 278. [2022-04-06 20:10:48,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.1465201465201464) internal successors, (313), 273 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:48,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 317 transitions. [2022-04-06 20:10:48,856 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 317 transitions. Word has length 274 [2022-04-06 20:10:48,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:48,857 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 317 transitions. [2022-04-06 20:10:48,857 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.9047619047619047) internal successors, (164), 41 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:48,857 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 317 transitions. [2022-04-06 20:10:48,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-04-06 20:10:48,858 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:48,858 INFO L499 BasicCegarLoop]: trace histogram [89, 88, 50, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:48,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-04-06 20:10:49,058 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:49,058 INFO L403 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:49,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:49,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1901530049, now seen corresponding path program 175 times [2022-04-06 20:10:49,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:49,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443492387] [2022-04-06 20:10:49,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:49,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:49,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1901530049, now seen corresponding path program 176 times [2022-04-06 20:10:49,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:49,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712024396] [2022-04-06 20:10:49,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:49,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:49,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,683 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:49,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 7060 proven. 4409 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-04-06 20:10:49,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712024396] [2022-04-06 20:10:49,686 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712024396] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424289275] [2022-04-06 20:10:49,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:10:49,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:49,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:49,687 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:49,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-04-06 20:10:49,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:10:49,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:49,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 91 conjunts are in the unsatisfiable core [2022-04-06 20:10:49,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:50,478 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 7224 proven. 4409 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:10:50,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:50,941 INFO L134 CoverageAnalysis]: Checked inductivity of 11748 backedges. 7224 proven. 4409 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 20:10:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [424289275] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:50,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:50,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 53, 53] total 65 [2022-04-06 20:10:50,942 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:50,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443492387] [2022-04-06 20:10:50,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443492387] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:50,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:50,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-04-06 20:10:50,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711053483] [2022-04-06 20:10:50,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:50,942 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-04-06 20:10:50,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:50,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-04-06 20:10:50,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-04-06 20:10:50,943 INFO L87 Difference]: Start difference. First operand 278 states and 317 transitions. Second operand has 43 states, 43 states have (on average 3.9069767441860463) internal successors, (168), 42 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:52,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:52,268 INFO L93 Difference]: Finished difference Result 401 states and 479 transitions. [2022-04-06 20:10:52,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-04-06 20:10:52,269 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.9069767441860463) internal successors, (168), 42 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-04-06 20:10:52,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:52,270 INFO L225 Difference]: With dead ends: 401 [2022-04-06 20:10:52,270 INFO L226 Difference]: Without dead ends: 396 [2022-04-06 20:10:52,270 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 715 GetRequests, 611 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4178, Invalid=6742, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:52,270 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:52,271 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 68 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:52,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2022-04-06 20:10:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 281. [2022-04-06 20:10:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.1485507246376812) internal successors, (317), 276 states have internal predecessors, (317), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 321 transitions. [2022-04-06 20:10:52,639 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 321 transitions. Word has length 277 [2022-04-06 20:10:52,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:52,640 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 321 transitions. [2022-04-06 20:10:52,640 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.9069767441860463) internal successors, (168), 42 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:52,640 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 321 transitions. [2022-04-06 20:10:52,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-04-06 20:10:52,641 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:52,641 INFO L499 BasicCegarLoop]: trace histogram [90, 89, 50, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:52,667 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-04-06 20:10:52,864 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:52,864 INFO L403 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:52,865 INFO L85 PathProgramCache]: Analyzing trace with hash 707523047, now seen corresponding path program 177 times [2022-04-06 20:10:52,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:52,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [993652982] [2022-04-06 20:10:52,866 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:52,866 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:52,866 INFO L85 PathProgramCache]: Analyzing trace with hash 707523047, now seen corresponding path program 178 times [2022-04-06 20:10:52,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:52,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965788813] [2022-04-06 20:10:52,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:52,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:53,552 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 7121 proven. 4642 refuted. 0 times theorem prover too weak. 252 trivial. 0 not checked. [2022-04-06 20:10:53,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:53,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965788813] [2022-04-06 20:10:53,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965788813] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:53,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320871675] [2022-04-06 20:10:53,552 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:10:53,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:53,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:53,553 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:53,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-04-06 20:10:53,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:10:53,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:53,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 92 conjunts are in the unsatisfiable core [2022-04-06 20:10:53,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:54,327 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 7255 proven. 4642 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 20:10:54,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:54,782 INFO L134 CoverageAnalysis]: Checked inductivity of 12015 backedges. 7255 proven. 4642 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 20:10:54,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320871675] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:54,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:54,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 53, 53] total 64 [2022-04-06 20:10:54,783 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [993652982] [2022-04-06 20:10:54,783 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [993652982] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:54,783 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:54,783 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-04-06 20:10:54,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517606712] [2022-04-06 20:10:54,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:54,783 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-04-06 20:10:54,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:54,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-04-06 20:10:54,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-04-06 20:10:54,784 INFO L87 Difference]: Start difference. First operand 281 states and 321 transitions. Second operand has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 43 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 20:10:56,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:10:56,144 INFO L93 Difference]: Finished difference Result 407 states and 487 transitions. [2022-04-06 20:10:56,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-04-06 20:10:56,144 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 43 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 280 [2022-04-06 20:10:56,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:10:56,145 INFO L225 Difference]: With dead ends: 407 [2022-04-06 20:10:56,145 INFO L226 Difference]: Without dead ends: 402 [2022-04-06 20:10:56,146 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 725 GetRequests, 621 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4169, Invalid=6751, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:10:56,146 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:10:56,146 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 69 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:10:56,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-04-06 20:10:56,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 284. [2022-04-06 20:10:56,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.1505376344086022) internal successors, (321), 279 states have internal predecessors, (321), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:10:56,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 325 transitions. [2022-04-06 20:10:56,539 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 325 transitions. Word has length 280 [2022-04-06 20:10:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:10:56,540 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 325 transitions. [2022-04-06 20:10:56,540 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.909090909090909) internal successors, (172), 43 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 20:10:56,540 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 325 transitions. [2022-04-06 20:10:56,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-04-06 20:10:56,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:10:56,541 INFO L499 BasicCegarLoop]: trace histogram [91, 90, 50, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:10:56,557 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-04-06 20:10:56,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-04-06 20:10:56,741 INFO L403 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:10:56,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:10:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash 964071937, now seen corresponding path program 179 times [2022-04-06 20:10:56,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:56,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [297970071] [2022-04-06 20:10:56,742 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:10:56,743 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:10:56,743 INFO L85 PathProgramCache]: Analyzing trace with hash 964071937, now seen corresponding path program 180 times [2022-04-06 20:10:56,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:10:56,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885730194] [2022-04-06 20:10:56,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:10:56,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:10:56,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:10:57,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:10:57,422 INFO L134 CoverageAnalysis]: Checked inductivity of 12285 backedges. 7176 proven. 4881 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 20:10:57,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:10:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885730194] [2022-04-06 20:10:57,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885730194] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:10:57,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702507156] [2022-04-06 20:10:57,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:10:57,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:10:57,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:10:57,423 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:10:57,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-04-06 20:10:57,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2022-04-06 20:10:57,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:10:57,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 93 conjunts are in the unsatisfiable core [2022-04-06 20:10:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:10:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 12285 backedges. 7283 proven. 4881 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:10:58,229 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:10:58,682 INFO L134 CoverageAnalysis]: Checked inductivity of 12285 backedges. 7283 proven. 4881 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-04-06 20:10:58,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702507156] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:10:58,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:10:58,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 53, 53] total 63 [2022-04-06 20:10:58,683 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:10:58,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [297970071] [2022-04-06 20:10:58,683 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [297970071] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:10:58,683 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:10:58,683 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-04-06 20:10:58,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795819930] [2022-04-06 20:10:58,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:10:58,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-04-06 20:10:58,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:10:58,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-04-06 20:10:58,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-04-06 20:10:58,684 INFO L87 Difference]: Start difference. First operand 284 states and 325 transitions. Second operand has 45 states, 45 states have (on average 3.911111111111111) internal successors, (176), 44 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:00,091 INFO L93 Difference]: Finished difference Result 413 states and 495 transitions. [2022-04-06 20:11:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-04-06 20:11:00,091 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.911111111111111) internal successors, (176), 44 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-04-06 20:11:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:00,093 INFO L225 Difference]: With dead ends: 413 [2022-04-06 20:11:00,093 INFO L226 Difference]: Without dead ends: 408 [2022-04-06 20:11:00,093 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 735 GetRequests, 631 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2188 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4161, Invalid=6759, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:00,093 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:00,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 70 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:00,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-04-06 20:11:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 287. [2022-04-06 20:11:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.1524822695035462) internal successors, (325), 282 states have internal predecessors, (325), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 329 transitions. [2022-04-06 20:11:00,510 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 329 transitions. Word has length 283 [2022-04-06 20:11:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:00,510 INFO L478 AbstractCegarLoop]: Abstraction has 287 states and 329 transitions. [2022-04-06 20:11:00,510 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.911111111111111) internal successors, (176), 44 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:00,510 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 329 transitions. [2022-04-06 20:11:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-04-06 20:11:00,511 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:00,511 INFO L499 BasicCegarLoop]: trace histogram [92, 91, 50, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:00,528 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:00,712 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:00,712 INFO L403 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:00,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:00,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1229732953, now seen corresponding path program 181 times [2022-04-06 20:11:00,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:00,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746573142] [2022-04-06 20:11:00,713 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:00,713 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:00,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1229732953, now seen corresponding path program 182 times [2022-04-06 20:11:00,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:00,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746567592] [2022-04-06 20:11:00,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:00,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:00,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:01,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:01,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 7225 proven. 5126 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-04-06 20:11:01,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746567592] [2022-04-06 20:11:01,436 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746567592] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:01,436 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263322937] [2022-04-06 20:11:01,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:01,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:01,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:01,437 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:01,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-04-06 20:11:01,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:01,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:01,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 94 conjunts are in the unsatisfiable core [2022-04-06 20:11:01,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 7308 proven. 5126 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 20:11:02,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:02,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12558 backedges. 7308 proven. 5126 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-04-06 20:11:02,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263322937] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:02,615 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:02,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 53, 53] total 62 [2022-04-06 20:11:02,615 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:02,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746573142] [2022-04-06 20:11:02,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746573142] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:02,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:02,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-04-06 20:11:02,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407408634] [2022-04-06 20:11:02,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:02,616 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-04-06 20:11:02,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:02,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-04-06 20:11:02,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-04-06 20:11:02,617 INFO L87 Difference]: Start difference. First operand 287 states and 329 transitions. Second operand has 46 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:04,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:04,105 INFO L93 Difference]: Finished difference Result 419 states and 503 transitions. [2022-04-06 20:11:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-04-06 20:11:04,105 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-04-06 20:11:04,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:04,106 INFO L225 Difference]: With dead ends: 419 [2022-04-06 20:11:04,106 INFO L226 Difference]: Without dead ends: 414 [2022-04-06 20:11:04,107 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 641 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2096 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4154, Invalid=6766, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:04,107 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:04,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:04,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-04-06 20:11:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 290. [2022-04-06 20:11:04,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.1543859649122807) internal successors, (329), 285 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 333 transitions. [2022-04-06 20:11:04,553 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 333 transitions. Word has length 286 [2022-04-06 20:11:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:04,553 INFO L478 AbstractCegarLoop]: Abstraction has 290 states and 333 transitions. [2022-04-06 20:11:04,553 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.9130434782608696) internal successors, (180), 45 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:04,554 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 333 transitions. [2022-04-06 20:11:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-04-06 20:11:04,555 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:04,555 INFO L499 BasicCegarLoop]: trace histogram [93, 92, 50, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:04,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:04,778 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:04,778 INFO L403 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:04,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:04,779 INFO L85 PathProgramCache]: Analyzing trace with hash -353867711, now seen corresponding path program 183 times [2022-04-06 20:11:04,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:04,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1530830929] [2022-04-06 20:11:04,780 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:04,780 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:04,780 INFO L85 PathProgramCache]: Analyzing trace with hash -353867711, now seen corresponding path program 184 times [2022-04-06 20:11:04,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:04,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013259935] [2022-04-06 20:11:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:04,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:04,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:05,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:05,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:05,588 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 7268 proven. 5377 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-04-06 20:11:05,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:05,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013259935] [2022-04-06 20:11:05,588 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013259935] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:05,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435127710] [2022-04-06 20:11:05,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:11:05,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:05,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:05,590 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:05,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-04-06 20:11:05,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:11:05,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:05,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 697 conjuncts, 95 conjunts are in the unsatisfiable core [2022-04-06 20:11:05,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:06,290 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 7330 proven. 5377 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-06 20:11:06,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12834 backedges. 7330 proven. 5377 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-04-06 20:11:06,743 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435127710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:06,743 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:06,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 53, 53] total 61 [2022-04-06 20:11:06,744 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:06,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1530830929] [2022-04-06 20:11:06,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1530830929] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:06,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:06,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-04-06 20:11:06,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481749942] [2022-04-06 20:11:06,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:06,744 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-04-06 20:11:06,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:06,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-04-06 20:11:06,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-04-06 20:11:06,745 INFO L87 Difference]: Start difference. First operand 290 states and 333 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 46 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 20:11:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:08,302 INFO L93 Difference]: Finished difference Result 425 states and 511 transitions. [2022-04-06 20:11:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-04-06 20:11:08,302 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 46 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 289 [2022-04-06 20:11:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:08,304 INFO L225 Difference]: With dead ends: 425 [2022-04-06 20:11:08,304 INFO L226 Difference]: Without dead ends: 420 [2022-04-06 20:11:08,304 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 755 GetRequests, 651 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4148, Invalid=6772, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:08,304 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:08,304 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2022-04-06 20:11:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 293. [2022-04-06 20:11:08,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.15625) internal successors, (333), 288 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:08,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 337 transitions. [2022-04-06 20:11:08,777 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 337 transitions. Word has length 289 [2022-04-06 20:11:08,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:08,777 INFO L478 AbstractCegarLoop]: Abstraction has 293 states and 337 transitions. [2022-04-06 20:11:08,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 46 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 20:11:08,777 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 337 transitions. [2022-04-06 20:11:08,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-04-06 20:11:08,778 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:08,778 INFO L499 BasicCegarLoop]: trace histogram [94, 93, 50, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:08,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-04-06 20:11:08,978 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:08,978 INFO L403 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:08,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:08,979 INFO L85 PathProgramCache]: Analyzing trace with hash 621233511, now seen corresponding path program 185 times [2022-04-06 20:11:08,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:08,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1527921023] [2022-04-06 20:11:08,980 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:08,980 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:08,980 INFO L85 PathProgramCache]: Analyzing trace with hash 621233511, now seen corresponding path program 186 times [2022-04-06 20:11:08,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:08,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928337026] [2022-04-06 20:11:08,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:08,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:09,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:09,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:09,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:09,747 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 7305 proven. 5634 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2022-04-06 20:11:09,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:09,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928337026] [2022-04-06 20:11:09,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928337026] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:09,747 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827476102] [2022-04-06 20:11:09,747 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:09,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:09,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:09,748 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:09,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-04-06 20:11:09,889 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 94 check-sat command(s) [2022-04-06 20:11:09,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 704 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 20:11:09,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:10,477 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 7349 proven. 5634 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:11:10,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 13113 backedges. 7349 proven. 5634 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2022-04-06 20:11:10,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827476102] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:10,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:10,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 53, 53] total 60 [2022-04-06 20:11:10,926 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:10,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1527921023] [2022-04-06 20:11:10,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1527921023] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:10,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:10,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-04-06 20:11:10,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607080891] [2022-04-06 20:11:10,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:10,927 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-04-06 20:11:10,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:10,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-04-06 20:11:10,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-04-06 20:11:10,930 INFO L87 Difference]: Start difference. First operand 293 states and 337 transitions. Second operand has 48 states, 48 states have (on average 3.9166666666666665) internal successors, (188), 47 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:12,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:12,608 INFO L93 Difference]: Finished difference Result 431 states and 519 transitions. [2022-04-06 20:11:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-04-06 20:11:12,608 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.9166666666666665) internal successors, (188), 47 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-04-06 20:11:12,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:12,610 INFO L225 Difference]: With dead ends: 431 [2022-04-06 20:11:12,610 INFO L226 Difference]: Without dead ends: 426 [2022-04-06 20:11:12,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 765 GetRequests, 661 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1909 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4143, Invalid=6777, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:12,610 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:12,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 83 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-04-06 20:11:13,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 296. [2022-04-06 20:11:13,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.1580756013745706) internal successors, (337), 291 states have internal predecessors, (337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:13,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 341 transitions. [2022-04-06 20:11:13,116 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 341 transitions. Word has length 292 [2022-04-06 20:11:13,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:13,116 INFO L478 AbstractCegarLoop]: Abstraction has 296 states and 341 transitions. [2022-04-06 20:11:13,116 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.9166666666666665) internal successors, (188), 47 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:13,116 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 341 transitions. [2022-04-06 20:11:13,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-04-06 20:11:13,117 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:13,117 INFO L499 BasicCegarLoop]: trace histogram [95, 94, 50, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:13,134 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-04-06 20:11:13,318 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:13,318 INFO L403 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:13,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:13,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1297052031, now seen corresponding path program 187 times [2022-04-06 20:11:13,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:13,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1238949033] [2022-04-06 20:11:13,319 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:13,319 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:13,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1297052031, now seen corresponding path program 188 times [2022-04-06 20:11:13,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:13,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358204036] [2022-04-06 20:11:13,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:13,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:14,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 7336 proven. 5897 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-04-06 20:11:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358204036] [2022-04-06 20:11:14,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358204036] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:14,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026218523] [2022-04-06 20:11:14,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:14,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:14,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:14,199 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:14,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-04-06 20:11:14,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:14,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:14,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 97 conjunts are in the unsatisfiable core [2022-04-06 20:11:14,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:14,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 7365 proven. 5897 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 20:11:14,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 13395 backedges. 7365 proven. 5897 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-04-06 20:11:15,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026218523] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:15,314 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:15,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 53, 53] total 59 [2022-04-06 20:11:15,315 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:15,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1238949033] [2022-04-06 20:11:15,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1238949033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:15,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:15,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-04-06 20:11:15,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140420208] [2022-04-06 20:11:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:15,315 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-04-06 20:11:15,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-04-06 20:11:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-04-06 20:11:15,316 INFO L87 Difference]: Start difference. First operand 296 states and 341 transitions. Second operand has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 48 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:17,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:17,090 INFO L93 Difference]: Finished difference Result 437 states and 527 transitions. [2022-04-06 20:11:17,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-04-06 20:11:17,090 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 48 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-04-06 20:11:17,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:17,091 INFO L225 Difference]: With dead ends: 437 [2022-04-06 20:11:17,091 INFO L226 Difference]: Without dead ends: 432 [2022-04-06 20:11:17,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 775 GetRequests, 671 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1814 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4139, Invalid=6781, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:17,092 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:17,092 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 84 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:17,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-04-06 20:11:17,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 299. [2022-04-06 20:11:17,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 294 states have (on average 1.1598639455782314) internal successors, (341), 294 states have internal predecessors, (341), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:17,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 345 transitions. [2022-04-06 20:11:17,632 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 345 transitions. Word has length 295 [2022-04-06 20:11:17,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:17,632 INFO L478 AbstractCegarLoop]: Abstraction has 299 states and 345 transitions. [2022-04-06 20:11:17,632 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.9183673469387754) internal successors, (192), 48 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:17,633 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 345 transitions. [2022-04-06 20:11:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2022-04-06 20:11:17,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:17,634 INFO L499 BasicCegarLoop]: trace histogram [96, 95, 50, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:17,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:17,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2022-04-06 20:11:17,855 INFO L403 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:17,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:17,856 INFO L85 PathProgramCache]: Analyzing trace with hash -106793177, now seen corresponding path program 189 times [2022-04-06 20:11:17,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:17,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1359335653] [2022-04-06 20:11:17,857 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:17,857 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:17,857 INFO L85 PathProgramCache]: Analyzing trace with hash -106793177, now seen corresponding path program 190 times [2022-04-06 20:11:17,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:17,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443795938] [2022-04-06 20:11:17,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:17,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:18,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:18,696 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7361 proven. 6166 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-04-06 20:11:18,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443795938] [2022-04-06 20:11:18,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443795938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:18,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657160355] [2022-04-06 20:11:18,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:11:18,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:18,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:18,699 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:18,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-04-06 20:11:18,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:11:18,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:18,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 718 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 20:11:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:19,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7378 proven. 6166 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:11:19,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13680 backedges. 7378 proven. 6166 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-04-06 20:11:19,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657160355] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:19,784 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:19,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 53, 53] total 58 [2022-04-06 20:11:19,784 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:19,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1359335653] [2022-04-06 20:11:19,784 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1359335653] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:19,784 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:19,784 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-04-06 20:11:19,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122374750] [2022-04-06 20:11:19,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:19,785 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-04-06 20:11:19,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:19,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-04-06 20:11:19,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-04-06 20:11:19,786 INFO L87 Difference]: Start difference. First operand 299 states and 345 transitions. Second operand has 50 states, 50 states have (on average 3.92) internal successors, (196), 49 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 20:11:21,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:21,683 INFO L93 Difference]: Finished difference Result 443 states and 535 transitions. [2022-04-06 20:11:21,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-04-06 20:11:21,684 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.92) internal successors, (196), 49 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 298 [2022-04-06 20:11:21,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:21,685 INFO L225 Difference]: With dead ends: 443 [2022-04-06 20:11:21,685 INFO L226 Difference]: Without dead ends: 438 [2022-04-06 20:11:21,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 681 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1718 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4136, Invalid=6784, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:21,685 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:21,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 80 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 632 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:21,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-04-06 20:11:22,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 302. [2022-04-06 20:11:22,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 297 states have (on average 1.1616161616161615) internal successors, (345), 297 states have internal predecessors, (345), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:22,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 349 transitions. [2022-04-06 20:11:22,266 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 349 transitions. Word has length 298 [2022-04-06 20:11:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:22,267 INFO L478 AbstractCegarLoop]: Abstraction has 302 states and 349 transitions. [2022-04-06 20:11:22,267 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.92) internal successors, (196), 49 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 20:11:22,267 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 349 transitions. [2022-04-06 20:11:22,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2022-04-06 20:11:22,268 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:22,268 INFO L499 BasicCegarLoop]: trace histogram [97, 96, 50, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:22,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-04-06 20:11:22,468 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-04-06 20:11:22,468 INFO L403 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash -355269439, now seen corresponding path program 191 times [2022-04-06 20:11:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:22,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410223588] [2022-04-06 20:11:22,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:22,470 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:22,470 INFO L85 PathProgramCache]: Analyzing trace with hash -355269439, now seen corresponding path program 192 times [2022-04-06 20:11:22,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:22,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973183905] [2022-04-06 20:11:22,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:22,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:22,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:23,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:23,335 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 7380 proven. 6441 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 20:11:23,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:23,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973183905] [2022-04-06 20:11:23,335 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973183905] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:23,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847379388] [2022-04-06 20:11:23,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:23,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:23,336 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:23,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-04-06 20:11:23,481 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2022-04-06 20:11:23,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 99 conjunts are in the unsatisfiable core [2022-04-06 20:11:23,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 7388 proven. 6441 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 20:11:24,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:24,463 INFO L134 CoverageAnalysis]: Checked inductivity of 13968 backedges. 7388 proven. 6441 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 20:11:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847379388] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:24,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:24,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 53, 53] total 57 [2022-04-06 20:11:24,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:24,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410223588] [2022-04-06 20:11:24,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410223588] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:24,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:24,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-04-06 20:11:24,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502509374] [2022-04-06 20:11:24,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:24,466 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-04-06 20:11:24,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:24,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-04-06 20:11:24,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-04-06 20:11:24,467 INFO L87 Difference]: Start difference. First operand 302 states and 349 transitions. Second operand has 51 states, 51 states have (on average 3.9215686274509802) internal successors, (200), 50 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:26,472 INFO L93 Difference]: Finished difference Result 449 states and 543 transitions. [2022-04-06 20:11:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-04-06 20:11:26,472 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9215686274509802) internal successors, (200), 50 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 301 [2022-04-06 20:11:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:26,473 INFO L225 Difference]: With dead ends: 449 [2022-04-06 20:11:26,473 INFO L226 Difference]: Without dead ends: 444 [2022-04-06 20:11:26,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 691 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:26,474 INFO L913 BasicCegarLoop]: 59 mSDtfsCounter, 9 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:26,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 81 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:26,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-04-06 20:11:27,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 305. [2022-04-06 20:11:27,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.1633333333333333) internal successors, (349), 300 states have internal predecessors, (349), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:27,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 353 transitions. [2022-04-06 20:11:27,087 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 353 transitions. Word has length 301 [2022-04-06 20:11:27,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:27,087 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 353 transitions. [2022-04-06 20:11:27,087 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9215686274509802) internal successors, (200), 50 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:27,087 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 353 transitions. [2022-04-06 20:11:27,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-04-06 20:11:27,088 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:27,088 INFO L499 BasicCegarLoop]: trace histogram [98, 97, 50, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:27,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:27,291 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:27,291 INFO L403 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:27,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:27,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1812027623, now seen corresponding path program 193 times [2022-04-06 20:11:27,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:27,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1977867699] [2022-04-06 20:11:27,293 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:27,293 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:27,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1812027623, now seen corresponding path program 194 times [2022-04-06 20:11:27,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:27,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324242322] [2022-04-06 20:11:27,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:27,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:27,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:28,186 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 7393 proven. 6722 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:11:28,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324242322] [2022-04-06 20:11:28,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324242322] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:28,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483986410] [2022-04-06 20:11:28,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:28,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:28,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:28,187 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:28,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-04-06 20:11:28,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:28,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:28,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 20:11:28,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:28,779 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 7395 proven. 6722 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:11:28,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 14259 backedges. 7395 proven. 6722 refuted. 0 times theorem prover too weak. 142 trivial. 0 not checked. [2022-04-06 20:11:29,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483986410] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:29,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:29,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 56 [2022-04-06 20:11:29,226 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:29,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1977867699] [2022-04-06 20:11:29,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1977867699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:29,227 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:29,227 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-04-06 20:11:29,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024661339] [2022-04-06 20:11:29,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:29,227 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-04-06 20:11:29,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:29,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-04-06 20:11:29,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:11:29,228 INFO L87 Difference]: Start difference. First operand 305 states and 353 transitions. Second operand has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 51 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:31,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:31,249 INFO L93 Difference]: Finished difference Result 455 states and 551 transitions. [2022-04-06 20:11:31,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-04-06 20:11:31,249 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 51 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2022-04-06 20:11:31,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:31,251 INFO L225 Difference]: With dead ends: 455 [2022-04-06 20:11:31,251 INFO L226 Difference]: Without dead ends: 450 [2022-04-06 20:11:31,251 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 805 GetRequests, 701 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4133, Invalid=6787, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:31,252 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 9 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:31,252 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:11:31,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2022-04-06 20:11:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 308. [2022-04-06 20:11:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 303 states have (on average 1.165016501650165) internal successors, (353), 303 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:31,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 357 transitions. [2022-04-06 20:11:31,904 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 357 transitions. Word has length 304 [2022-04-06 20:11:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:31,904 INFO L478 AbstractCegarLoop]: Abstraction has 308 states and 357 transitions. [2022-04-06 20:11:31,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.923076923076923) internal successors, (204), 51 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 357 transitions. [2022-04-06 20:11:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-04-06 20:11:31,905 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:31,905 INFO L499 BasicCegarLoop]: trace histogram [99, 98, 50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:31,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:32,106 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:32,106 INFO L403 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1515440897, now seen corresponding path program 195 times [2022-04-06 20:11:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:32,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [764456850] [2022-04-06 20:11:32,107 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:32,107 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:32,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1515440897, now seen corresponding path program 196 times [2022-04-06 20:11:32,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:32,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285349630] [2022-04-06 20:11:32,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:32,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:33,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 14553 backedges. 7400 proven. 7009 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 20:11:33,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:33,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285349630] [2022-04-06 20:11:33,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285349630] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:33,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340360829] [2022-04-06 20:11:33,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:11:33,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:33,034 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:33,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-04-06 20:11:33,134 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:11:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 739 conjuncts, 101 conjunts are in the unsatisfiable core [2022-04-06 20:11:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:33,612 INFO L134 CoverageAnalysis]: Checked inductivity of 14553 backedges. 7399 proven. 7009 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-04-06 20:11:33,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:34,058 INFO L134 CoverageAnalysis]: Checked inductivity of 14553 backedges. 7399 proven. 7009 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-04-06 20:11:34,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340360829] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:34,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:34,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 55 [2022-04-06 20:11:34,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:34,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [764456850] [2022-04-06 20:11:34,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [764456850] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:34,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:34,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:11:34,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214310737] [2022-04-06 20:11:34,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:34,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:11:34,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:34,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:11:34,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:11:34,060 INFO L87 Difference]: Start difference. First operand 308 states and 357 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:36,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:36,223 INFO L93 Difference]: Finished difference Result 461 states and 559 transitions. [2022-04-06 20:11:36,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:11:36,223 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-04-06 20:11:36,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:36,224 INFO L225 Difference]: With dead ends: 461 [2022-04-06 20:11:36,224 INFO L226 Difference]: Without dead ends: 456 [2022-04-06 20:11:36,225 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 816 GetRequests, 712 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4133, Invalid=6787, Unknown=0, NotChecked=0, Total=10920 [2022-04-06 20:11:36,225 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:36,225 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 98 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:36,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-04-06 20:11:36,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 311. [2022-04-06 20:11:36,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 306 states have (on average 1.1666666666666667) internal successors, (357), 306 states have internal predecessors, (357), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 361 transitions. [2022-04-06 20:11:36,913 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 361 transitions. Word has length 307 [2022-04-06 20:11:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:36,913 INFO L478 AbstractCegarLoop]: Abstraction has 311 states and 361 transitions. [2022-04-06 20:11:36,913 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 361 transitions. [2022-04-06 20:11:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-04-06 20:11:36,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:36,914 INFO L499 BasicCegarLoop]: trace histogram [100, 99, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:36,931 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2022-04-06 20:11:37,115 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-04-06 20:11:37,115 INFO L403 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:37,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:37,116 INFO L85 PathProgramCache]: Analyzing trace with hash 648014503, now seen corresponding path program 197 times [2022-04-06 20:11:37,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:37,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2141135632] [2022-04-06 20:11:37,117 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:37,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:37,118 INFO L85 PathProgramCache]: Analyzing trace with hash 648014503, now seen corresponding path program 198 times [2022-04-06 20:11:37,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:37,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483442766] [2022-04-06 20:11:37,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:37,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:37,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:38,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:38,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7203 proven. 7500 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 20:11:38,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483442766] [2022-04-06 20:11:38,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483442766] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:38,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423925804] [2022-04-06 20:11:38,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:11:38,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:38,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:38,084 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:38,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-04-06 20:11:38,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 100 check-sat command(s) [2022-04-06 20:11:38,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:38,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 102 conjunts are in the unsatisfiable core [2022-04-06 20:11:38,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7401 proven. 7302 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 20:11:38,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 14850 backedges. 7401 proven. 7302 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 20:11:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423925804] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:39,151 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:39,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 53, 53] total 55 [2022-04-06 20:11:39,151 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:39,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2141135632] [2022-04-06 20:11:39,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2141135632] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:39,151 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:39,151 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-04-06 20:11:39,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362890027] [2022-04-06 20:11:39,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:39,151 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-04-06 20:11:39,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-04-06 20:11:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:11:39,152 INFO L87 Difference]: Start difference. First operand 311 states and 361 transitions. Second operand has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 54 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 20:11:41,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:11:41,456 INFO L93 Difference]: Finished difference Result 467 states and 567 transitions. [2022-04-06 20:11:41,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-04-06 20:11:41,456 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 54 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 310 [2022-04-06 20:11:41,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:11:41,457 INFO L225 Difference]: With dead ends: 467 [2022-04-06 20:11:41,457 INFO L226 Difference]: Without dead ends: 462 [2022-04-06 20:11:41,458 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 776 GetRequests, 670 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=4143, Invalid=7199, Unknown=0, NotChecked=0, Total=11342 [2022-04-06 20:11:41,458 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 16 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 20:11:41,459 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 99 Invalid, 878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 817 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 20:11:41,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2022-04-06 20:11:42,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 314. [2022-04-06 20:11:42,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 309 states have (on average 1.168284789644013) internal successors, (361), 309 states have internal predecessors, (361), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:11:42,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 365 transitions. [2022-04-06 20:11:42,195 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 365 transitions. Word has length 310 [2022-04-06 20:11:42,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:11:42,195 INFO L478 AbstractCegarLoop]: Abstraction has 314 states and 365 transitions. [2022-04-06 20:11:42,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.7818181818181817) internal successors, (208), 54 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 20:11:42,195 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 365 transitions. [2022-04-06 20:11:42,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2022-04-06 20:11:42,196 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:11:42,197 INFO L499 BasicCegarLoop]: trace histogram [101, 100, 51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:11:42,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-04-06 20:11:42,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:42,399 INFO L403 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:11:42,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:11:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1966530881, now seen corresponding path program 199 times [2022-04-06 20:11:42,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:42,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1910388398] [2022-04-06 20:11:42,401 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:11:42,401 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:11:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1966530881, now seen corresponding path program 200 times [2022-04-06 20:11:42,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:11:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170485968] [2022-04-06 20:11:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:11:42,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:11:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:45,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:11:45,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:11:45,466 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:45,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:11:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170485968] [2022-04-06 20:11:45,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170485968] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:11:45,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985227691] [2022-04-06 20:11:45,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 20:11:45,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:11:45,466 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:11:45,467 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:11:45,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-04-06 20:11:45,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 20:11:45,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:11:45,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 205 conjunts are in the unsatisfiable core [2022-04-06 20:11:45,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:11:49,163 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:49,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:11:51,734 INFO L134 CoverageAnalysis]: Checked inductivity of 15150 backedges. 0 proven. 15150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 20:11:51,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985227691] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:11:51,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:11:51,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 105, 105] total 158 [2022-04-06 20:11:51,735 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:11:51,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1910388398] [2022-04-06 20:11:51,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1910388398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:11:51,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:11:51,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-04-06 20:11:51,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831351253] [2022-04-06 20:11:51,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:11:51,735 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-04-06 20:11:51,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:11:51,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-04-06 20:11:51,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2865, Invalid=21941, Unknown=0, NotChecked=0, Total=24806 [2022-04-06 20:11:51,736 INFO L87 Difference]: Start difference. First operand 314 states and 365 transitions. Second operand has 107 states, 107 states have (on average 2.8878504672897196) internal successors, (309), 105 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:19,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:19,109 INFO L93 Difference]: Finished difference Result 4399 states and 5826 transitions. [2022-04-06 20:12:19,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-04-06 20:12:19,109 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.8878504672897196) internal successors, (309), 105 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 313 [2022-04-06 20:12:19,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:19,115 INFO L225 Difference]: With dead ends: 4399 [2022-04-06 20:12:19,115 INFO L226 Difference]: Without dead ends: 4237 [2022-04-06 20:12:19,119 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 837 GetRequests, 543 SyntacticMatches, 34 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20667 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=5835, Invalid=62547, Unknown=0, NotChecked=0, Total=68382 [2022-04-06 20:12:19,120 INFO L913 BasicCegarLoop]: 159 mSDtfsCounter, 315 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 16331 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 16490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 16331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:19,120 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 476 Invalid, 16490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 16331 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-04-06 20:12:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2022-04-06 20:12:36,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 4188. [2022-04-06 20:12:36,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4183 states have (on average 1.0241453502271098) internal successors, (4284), 4183 states have internal predecessors, (4284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:36,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 4288 transitions. [2022-04-06 20:12:36,914 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 4288 transitions. Word has length 313 [2022-04-06 20:12:36,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:12:36,914 INFO L478 AbstractCegarLoop]: Abstraction has 4188 states and 4288 transitions. [2022-04-06 20:12:36,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.8878504672897196) internal successors, (309), 105 states have internal predecessors, (309), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:12:36,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 4288 transitions. [2022-04-06 20:12:36,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2022-04-06 20:12:36,916 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:12:36,916 INFO L499 BasicCegarLoop]: trace histogram [102, 101, 52, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:12:36,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2022-04-06 20:12:37,131 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-04-06 20:12:37,131 INFO L403 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:12:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:12:37,132 INFO L85 PathProgramCache]: Analyzing trace with hash 117058663, now seen corresponding path program 201 times [2022-04-06 20:12:37,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:37,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [194928449] [2022-04-06 20:12:37,133 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:12:37,133 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:12:37,133 INFO L85 PathProgramCache]: Analyzing trace with hash 117058663, now seen corresponding path program 202 times [2022-04-06 20:12:37,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:12:37,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422298938] [2022-04-06 20:12:37,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:12:37,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:12:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:38,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:12:38,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:12:38,235 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7403 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 20:12:38,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:12:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422298938] [2022-04-06 20:12:38,235 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422298938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:12:38,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156050295] [2022-04-06 20:12:38,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 20:12:38,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:12:38,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:12:38,236 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:12:38,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-04-06 20:12:38,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 20:12:38,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:12:38,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 760 conjuncts, 103 conjunts are in the unsatisfiable core [2022-04-06 20:12:38,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:12:38,878 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 20:12:38,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 20:12:39,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15453 backedges. 7903 proven. 7401 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2022-04-06 20:12:39,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156050295] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 20:12:39,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 20:12:39,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 54, 54] total 56 [2022-04-06 20:12:39,395 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:12:39,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [194928449] [2022-04-06 20:12:39,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [194928449] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:12:39,396 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:12:39,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-04-06 20:12:39,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635854648] [2022-04-06 20:12:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:12:39,396 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-04-06 20:12:39,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:12:39,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-04-06 20:12:39,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1486, Invalid=1594, Unknown=0, NotChecked=0, Total=3080 [2022-04-06 20:12:39,397 INFO L87 Difference]: Start difference. First operand 4188 states and 4288 transitions. Second operand has 56 states, 56 states have (on average 3.8214285714285716) internal successors, (214), 55 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 20:12:59,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:12:59,510 INFO L93 Difference]: Finished difference Result 8375 states and 8576 transitions. [2022-04-06 20:12:59,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-04-06 20:12:59,511 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.8214285714285716) internal successors, (214), 55 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 316 [2022-04-06 20:12:59,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:12:59,517 INFO L225 Difference]: With dead ends: 8375 [2022-04-06 20:12:59,517 INFO L226 Difference]: Without dead ends: 4191 [2022-04-06 20:12:59,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 790 GetRequests, 682 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1825 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4452, Invalid=7320, Unknown=0, NotChecked=0, Total=11772 [2022-04-06 20:12:59,522 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 110 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 20:12:59,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 44 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 20:12:59,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2022-04-06 20:13:17,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4191. [2022-04-06 20:13:17,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4191 states, 4186 states have (on average 1.0241280458671762) internal successors, (4287), 4186 states have internal predecessors, (4287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 20:13:17,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4191 states to 4191 states and 4291 transitions. [2022-04-06 20:13:17,382 INFO L78 Accepts]: Start accepts. Automaton has 4191 states and 4291 transitions. Word has length 316 [2022-04-06 20:13:17,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:13:17,382 INFO L478 AbstractCegarLoop]: Abstraction has 4191 states and 4291 transitions. [2022-04-06 20:13:17,382 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.8214285714285716) internal successors, (214), 55 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 20:13:17,382 INFO L276 IsEmpty]: Start isEmpty. Operand 4191 states and 4291 transitions. [2022-04-06 20:13:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-04-06 20:13:17,383 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 20:13:17,383 INFO L499 BasicCegarLoop]: trace histogram [103, 102, 52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 20:13:17,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2022-04-06 20:13:17,583 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-04-06 20:13:17,584 INFO L403 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 20:13:17,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 20:13:17,584 INFO L85 PathProgramCache]: Analyzing trace with hash 2055380803, now seen corresponding path program 203 times [2022-04-06 20:13:17,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 20:13:17,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [481102619] [2022-04-06 20:13:17,585 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 20:13:17,585 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 20:13:17,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2055380803, now seen corresponding path program 204 times [2022-04-06 20:13:17,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 20:13:17,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924284616] [2022-04-06 20:13:17,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 20:13:17,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 20:13:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:13:18,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 20:13:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 20:13:18,539 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11580 proven. 149 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2022-04-06 20:13:18,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 20:13:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924284616] [2022-04-06 20:13:18,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924284616] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 20:13:18,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036414622] [2022-04-06 20:13:18,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 20:13:18,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 20:13:18,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 20:13:18,540 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 20:13:18,540 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-04-06 20:13:18,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2022-04-06 20:13:18,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 20:13:18,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 767 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 20:13:18,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 20:13:19,111 INFO L134 CoverageAnalysis]: Checked inductivity of 15759 backedges. 11729 proven. 0 refuted. 0 times theorem prover too weak. 4030 trivial. 0 not checked. [2022-04-06 20:13:19,111 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 20:13:19,111 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036414622] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:13:19,111 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 20:13:19,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [54] total 55 [2022-04-06 20:13:19,112 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 20:13:19,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [481102619] [2022-04-06 20:13:19,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [481102619] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 20:13:19,112 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 20:13:19,112 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-04-06 20:13:19,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695581450] [2022-04-06 20:13:19,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 20:13:19,112 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-04-06 20:13:19,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 20:13:19,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-04-06 20:13:19,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:13:19,113 INFO L87 Difference]: Start difference. First operand 4191 states and 4291 transitions. Second operand has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 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 20:13:19,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 20:13:19,314 INFO L93 Difference]: Finished difference Result 4191 states and 4291 transitions. [2022-04-06 20:13:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-04-06 20:13:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 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 319 [2022-04-06 20:13:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 20:13:19,314 INFO L225 Difference]: With dead ends: 4191 [2022-04-06 20:13:19,315 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 20:13:19,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 320 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1383, Invalid=1587, Unknown=0, NotChecked=0, Total=2970 [2022-04-06 20:13:19,319 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 20:13:19,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 198 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 20:13:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 20:13:19,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 20:13:19,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 20:13:19,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 20:13:19,320 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 319 [2022-04-06 20:13:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 20:13:19,320 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 20:13:19,320 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.056603773584906) internal successors, (162), 53 states have internal predecessors, (162), 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 20:13:19,321 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 20:13:19,321 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 20:13:19,323 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 20:13:19,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-04-06 20:13:19,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-04-06 20:13:19,537 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.