/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/string-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 03:38:29,707 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 03:38:29,709 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 03:38:29,745 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 03:38:29,804 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 03:38:29,804 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 03:38:29,805 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 03:38:29,806 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-15 03:38:29,815 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 03:38:29,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 03:38:29,816 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 03:38:29,816 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 03:38:29,816 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 03:38:29,816 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 03:38:29,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 03:38:29,817 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 03:38:29,817 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 03:38:29,817 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 03:38:29,817 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 03:38:29,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 03:38:29,817 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 03:38:29,818 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 03:38:29,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 03:38:29,818 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:29,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 03:38:29,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 03:38:29,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 03:38:29,818 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-15 03:38:29,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 03:38:30,010 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 03:38:30,029 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 03:38:30,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 03:38:30,032 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 03:38:30,032 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 03:38:30,033 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/string-1.i [2022-02-15 03:38:30,090 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0918e3790/debb6d89ea164256996c4732e35eef18/FLAG07add4c7d [2022-02-15 03:38:30,421 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 03:38:30,422 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i [2022-02-15 03:38:30,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0918e3790/debb6d89ea164256996c4732e35eef18/FLAG07add4c7d [2022-02-15 03:38:30,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0918e3790/debb6d89ea164256996c4732e35eef18 [2022-02-15 03:38:30,440 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 03:38:30,441 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 03:38:30,442 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:30,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 03:38:30,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 03:38:30,446 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,447 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@383ab0c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30, skipping insertion in model container [2022-02-15 03:38:30,447 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,454 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 03:38:30,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 03:38:30,596 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-02-15 03:38:30,636 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:38:30,641 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 03:38:30,650 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/string-1.i[896,909] [2022-02-15 03:38:30,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 03:38:30,667 INFO L208 MainTranslator]: Completed translation [2022-02-15 03:38:30,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30 WrapperNode [2022-02-15 03:38:30,668 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 03:38:30,669 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 03:38:30,669 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 03:38:30,669 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 03:38:30,680 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,680 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,687 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,687 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,698 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,705 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,706 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,708 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 03:38:30,709 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 03:38:30,709 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 03:38:30,710 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 03:38:30,711 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (1/1) ... [2022-02-15 03:38:30,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 03:38:30,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 03:38:30,743 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) [2022-02-15 03:38:30,755 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 [2022-02-15 03:38:30,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 03:38:30,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 03:38:30,782 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 03:38:30,783 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 03:38:30,783 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 03:38:30,783 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 03:38:30,783 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 03:38:30,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 03:38:30,783 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 03:38:30,784 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 03:38:30,784 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 03:38:30,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 03:38:30,784 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 03:38:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 03:38:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-15 03:38:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 03:38:30,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 03:38:30,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 03:38:30,787 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 03:38:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 03:38:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 03:38:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 03:38:30,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 03:38:30,869 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 03:38:30,871 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 03:38:31,013 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 03:38:31,018 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 03:38:31,019 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-02-15 03:38:31,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:38:31 BoogieIcfgContainer [2022-02-15 03:38:31,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 03:38:31,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 03:38:31,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 03:38:31,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 03:38:31,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 03:38:30" (1/3) ... [2022-02-15 03:38:31,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5513bb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:38:31, skipping insertion in model container [2022-02-15 03:38:31,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 03:38:30" (2/3) ... [2022-02-15 03:38:31,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5513bb45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 03:38:31, skipping insertion in model container [2022-02-15 03:38:31,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 03:38:31" (3/3) ... [2022-02-15 03:38:31,038 INFO L111 eAbstractionObserver]: Analyzing ICFG string-1.i [2022-02-15 03:38:31,051 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 03:38:31,052 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 03:38:31,110 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 03:38:31,119 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=QVASR [2022-02-15 03:38:31,120 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 03:38:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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) [2022-02-15 03:38:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 03:38:31,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:31,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:31,139 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:31,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:31,144 INFO L85 PathProgramCache]: Analyzing trace with hash 739829093, now seen corresponding path program 1 times [2022-02-15 03:38:31,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:31,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971505175] [2022-02-15 03:38:31,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:31,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:31,213 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:31,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:31,416 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:31,416 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971505175] [2022-02-15 03:38:31,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [971505175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:31,418 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:31,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 03:38:31,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87159893] [2022-02-15 03:38:31,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:31,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 03:38:31,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:31,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 03:38:31,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 03:38:31,462 INFO L87 Difference]: Start difference. First operand has 35 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 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 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2022-02-15 03:38:31,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:31,632 INFO L93 Difference]: Finished difference Result 73 states and 109 transitions. [2022-02-15 03:38:31,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 03:38:31,636 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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 [2022-02-15 03:38:31,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:31,644 INFO L225 Difference]: With dead ends: 73 [2022-02-15 03:38:31,645 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 03:38:31,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:38:31,650 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 47 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:31,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 45 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 03:38:31,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2022-02-15 03:38:31,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-02-15 03:38:31,686 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 22 [2022-02-15 03:38:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:31,687 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-02-15 03:38:31,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 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) [2022-02-15 03:38:31,687 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-02-15 03:38:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 03:38:31,688 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:31,688 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:31,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 03:38:31,688 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:31,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:31,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1075962823, now seen corresponding path program 1 times [2022-02-15 03:38:31,689 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:31,689 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481703941] [2022-02-15 03:38:31,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:31,700 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:31,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:31,708 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:31,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:31,798 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:31,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481703941] [2022-02-15 03:38:31,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481703941] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:31,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:31,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:38:31,799 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933741188] [2022-02-15 03:38:31,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:31,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:38:31,800 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:31,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:38:31,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:38:31,801 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-02-15 03:38:31,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:31,909 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-02-15 03:38:31,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:38:31,909 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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 [2022-02-15 03:38:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:31,911 INFO L225 Difference]: With dead ends: 65 [2022-02-15 03:38:31,911 INFO L226 Difference]: Without dead ends: 44 [2022-02-15 03:38:31,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:31,912 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 48 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:31,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 32 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:31,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-15 03:38:31,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-02-15 03:38:31,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.206896551724138) internal successors, (35), 29 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) [2022-02-15 03:38:31,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2022-02-15 03:38:31,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 28 [2022-02-15 03:38:31,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:31,922 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2022-02-15 03:38:31,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 4 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) [2022-02-15 03:38:31,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2022-02-15 03:38:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 03:38:31,923 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:31,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:31,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 03:38:31,923 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash 875420793, now seen corresponding path program 2 times [2022-02-15 03:38:31,924 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:31,924 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2054178024] [2022-02-15 03:38:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:31,927 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:31,928 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:32,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:32,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2054178024] [2022-02-15 03:38:32,053 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2054178024] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:32,053 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:32,053 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 03:38:32,053 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133763231] [2022-02-15 03:38:32,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:32,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 03:38:32,054 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:32,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 03:38:32,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 03:38:32,055 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:32,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:32,189 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2022-02-15 03:38:32,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 03:38:32,190 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 03:38:32,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:32,191 INFO L225 Difference]: With dead ends: 75 [2022-02-15 03:38:32,191 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 03:38:32,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:32,192 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:32,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 32 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:32,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 03:38:32,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2022-02-15 03:38:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 33 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:32,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-02-15 03:38:32,216 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 32 [2022-02-15 03:38:32,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:32,216 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-02-15 03:38:32,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:32,217 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-02-15 03:38:32,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 03:38:32,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:32,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:32,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 03:38:32,218 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:32,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:32,218 INFO L85 PathProgramCache]: Analyzing trace with hash 133934009, now seen corresponding path program 3 times [2022-02-15 03:38:32,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:32,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057792250] [2022-02-15 03:38:32,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:32,222 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:32,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:32,224 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:32,314 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:32,314 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057792250] [2022-02-15 03:38:32,314 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057792250] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:32,314 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:32,314 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 03:38:32,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391085122] [2022-02-15 03:38:32,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:32,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 03:38:32,316 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 03:38:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:32,317 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2022-02-15 03:38:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:32,486 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2022-02-15 03:38:32,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 03:38:32,487 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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 36 [2022-02-15 03:38:32,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:32,488 INFO L225 Difference]: With dead ends: 85 [2022-02-15 03:38:32,489 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 03:38:32,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:32,499 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:32,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 37 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 03:38:32,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2022-02-15 03:38:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:32,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2022-02-15 03:38:32,512 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 36 [2022-02-15 03:38:32,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:32,513 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2022-02-15 03:38:32,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 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) [2022-02-15 03:38:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2022-02-15 03:38:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 03:38:32,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:32,514 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:32,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 03:38:32,514 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:32,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:32,515 INFO L85 PathProgramCache]: Analyzing trace with hash 173558265, now seen corresponding path program 4 times [2022-02-15 03:38:32,515 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:32,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166888375] [2022-02-15 03:38:32,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:32,517 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:32,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:32,518 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:32,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:32,645 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:32,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166888375] [2022-02-15 03:38:32,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [166888375] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:32,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:32,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:38:32,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557531942] [2022-02-15 03:38:32,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:32,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:38:32,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:32,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:38:32,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:38:32,648 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2022-02-15 03:38:32,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:32,808 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2022-02-15 03:38:32,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:38:32,809 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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 40 [2022-02-15 03:38:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:32,812 INFO L225 Difference]: With dead ends: 93 [2022-02-15 03:38:32,813 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 03:38:32,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:32,820 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 71 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:32,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 42 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:32,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 03:38:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2022-02-15 03:38:32,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.146341463414634) internal successors, (47), 41 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) [2022-02-15 03:38:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-02-15 03:38:32,833 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2022-02-15 03:38:32,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:32,833 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-02-15 03:38:32,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 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) [2022-02-15 03:38:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-02-15 03:38:32,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 03:38:32,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:32,834 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:32,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 03:38:32,835 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:32,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1461422279, now seen corresponding path program 5 times [2022-02-15 03:38:32,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:32,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1290507847] [2022-02-15 03:38:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:32,844 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:32,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:32,846 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:32,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:33,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:33,011 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:33,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1290507847] [2022-02-15 03:38:33,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1290507847] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:33,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:33,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:33,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056635554] [2022-02-15 03:38:33,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:33,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:33,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:33,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:33,013 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2022-02-15 03:38:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:33,160 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2022-02-15 03:38:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:38:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 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 44 [2022-02-15 03:38:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:33,164 INFO L225 Difference]: With dead ends: 62 [2022-02-15 03:38:33,164 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 03:38:33,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:38:33,166 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 37 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:33,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 54 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:33,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 03:38:33,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-02-15 03:38:33,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 43 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:33,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 53 transitions. [2022-02-15 03:38:33,181 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 53 transitions. Word has length 44 [2022-02-15 03:38:33,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:33,181 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 53 transitions. [2022-02-15 03:38:33,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 3.0) internal successors, (24), 7 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) [2022-02-15 03:38:33,182 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 53 transitions. [2022-02-15 03:38:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 03:38:33,188 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:33,188 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:33,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 03:38:33,188 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:33,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1421983316, now seen corresponding path program 1 times [2022-02-15 03:38:33,189 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:33,189 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2005634960] [2022-02-15 03:38:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:33,191 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:33,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:33,193 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:33,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:33,357 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:33,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2005634960] [2022-02-15 03:38:33,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2005634960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:33,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:33,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:38:33,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429851056] [2022-02-15 03:38:33,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:33,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:38:33,358 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:33,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:38:33,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:33,359 INFO L87 Difference]: Start difference. First operand 48 states and 53 transitions. Second operand has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:33,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:33,558 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2022-02-15 03:38:33,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:38:33,559 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have 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 [2022-02-15 03:38:33,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:33,559 INFO L225 Difference]: With dead ends: 59 [2022-02-15 03:38:33,559 INFO L226 Difference]: Without dead ends: 51 [2022-02-15 03:38:33,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:38:33,561 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 63 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:33,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 61 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:33,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-15 03:38:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2022-02-15 03:38:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 44 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) [2022-02-15 03:38:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-02-15 03:38:33,571 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 46 [2022-02-15 03:38:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:33,571 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-02-15 03:38:33,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-02-15 03:38:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 03:38:33,572 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:33,572 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:33,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 03:38:33,572 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1370221367, now seen corresponding path program 1 times [2022-02-15 03:38:33,573 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:33,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713577794] [2022-02-15 03:38:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:33,575 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:33,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:33,577 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:33,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:33,663 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:33,664 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713577794] [2022-02-15 03:38:33,664 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [713577794] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:33,664 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:33,664 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 03:38:33,664 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446166567] [2022-02-15 03:38:33,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:33,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 03:38:33,664 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:33,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 03:38:33,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 03:38:33,665 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2022-02-15 03:38:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:33,730 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2022-02-15 03:38:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 03:38:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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 48 [2022-02-15 03:38:33,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:33,731 INFO L225 Difference]: With dead ends: 67 [2022-02-15 03:38:33,731 INFO L226 Difference]: Without dead ends: 51 [2022-02-15 03:38:33,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-15 03:38:33,732 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 35 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:33,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 42 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 03:38:33,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-15 03:38:33,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-15 03:38:33,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 46 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:33,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 56 transitions. [2022-02-15 03:38:33,740 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 56 transitions. Word has length 48 [2022-02-15 03:38:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:33,740 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 56 transitions. [2022-02-15 03:38:33,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 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) [2022-02-15 03:38:33,741 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 56 transitions. [2022-02-15 03:38:33,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 03:38:33,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:33,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:33,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 03:38:33,742 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:33,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:33,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1255822596, now seen corresponding path program 1 times [2022-02-15 03:38:33,742 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:33,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [115504886] [2022-02-15 03:38:33,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:33,744 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:33,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:33,745 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:33,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:33,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:33,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:33,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [115504886] [2022-02-15 03:38:33,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [115504886] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:33,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:33,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:38:33,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127780331] [2022-02-15 03:38:33,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:38:33,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:38:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:33,869 INFO L87 Difference]: Start difference. First operand 51 states and 56 transitions. Second operand has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:34,032 INFO L93 Difference]: Finished difference Result 75 states and 86 transitions. [2022-02-15 03:38:34,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:38:34,032 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 03:38:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:34,033 INFO L225 Difference]: With dead ends: 75 [2022-02-15 03:38:34,033 INFO L226 Difference]: Without dead ends: 61 [2022-02-15 03:38:34,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:38:34,034 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 51 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:34,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 51 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:34,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-02-15 03:38:34,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 56. [2022-02-15 03:38:34,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.1372549019607843) internal successors, (58), 51 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2022-02-15 03:38:34,047 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 50 [2022-02-15 03:38:34,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:34,047 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2022-02-15 03:38:34,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,047 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2022-02-15 03:38:34,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:38:34,048 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:34,048 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:34,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 03:38:34,048 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:34,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:34,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1364208609, now seen corresponding path program 1 times [2022-02-15 03:38:34,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:34,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [143317856] [2022-02-15 03:38:34,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:34,050 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:34,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:34,052 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:34,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:34,134 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:34,135 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [143317856] [2022-02-15 03:38:34,135 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [143317856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:34,135 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:34,135 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:38:34,135 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740454515] [2022-02-15 03:38:34,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:34,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:38:34,135 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:34,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:38:34,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:34,136 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2022-02-15 03:38:34,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:34,329 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2022-02-15 03:38:34,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:38:34,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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 52 [2022-02-15 03:38:34,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:34,331 INFO L225 Difference]: With dead ends: 85 [2022-02-15 03:38:34,331 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 03:38:34,332 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2022-02-15 03:38:34,332 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 59 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:34,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 51 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:34,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 03:38:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2022-02-15 03:38:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-02-15 03:38:34,346 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 52 [2022-02-15 03:38:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:34,346 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-02-15 03:38:34,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 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) [2022-02-15 03:38:34,347 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-02-15 03:38:34,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 03:38:34,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:34,347 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:34,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 03:38:34,348 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:34,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:34,348 INFO L85 PathProgramCache]: Analyzing trace with hash 487788375, now seen corresponding path program 2 times [2022-02-15 03:38:34,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:34,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788285815] [2022-02-15 03:38:34,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:34,350 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:34,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:34,359 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:34,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:34,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1788285815] [2022-02-15 03:38:34,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1788285815] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:34,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:34,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:34,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269776778] [2022-02-15 03:38:34,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:34,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:34,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:34,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:34,492 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:34,728 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2022-02-15 03:38:34,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:38:34,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-02-15 03:38:34,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:34,729 INFO L225 Difference]: With dead ends: 83 [2022-02-15 03:38:34,729 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 03:38:34,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:34,730 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:34,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 61 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:34,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 03:38:34,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2022-02-15 03:38:34,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 67 transitions. [2022-02-15 03:38:34,740 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 67 transitions. Word has length 52 [2022-02-15 03:38:34,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:34,740 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 67 transitions. [2022-02-15 03:38:34,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.1) internal successors, (31), 9 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:34,740 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 67 transitions. [2022-02-15 03:38:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 03:38:34,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:34,741 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:34,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 03:38:34,741 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:34,741 INFO L85 PathProgramCache]: Analyzing trace with hash -559251162, now seen corresponding path program 2 times [2022-02-15 03:38:34,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:34,742 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204576919] [2022-02-15 03:38:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:34,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:34,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:34,744 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:34,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:34,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:34,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:34,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204576919] [2022-02-15 03:38:34,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [204576919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:34,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:34,806 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 03:38:34,806 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562191] [2022-02-15 03:38:34,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:34,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 03:38:34,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:34,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 03:38:34,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 03:38:34,807 INFO L87 Difference]: Start difference. First operand 60 states and 67 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2022-02-15 03:38:34,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:34,905 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2022-02-15 03:38:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 03:38:34,906 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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 54 [2022-02-15 03:38:34,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:34,907 INFO L225 Difference]: With dead ends: 69 [2022-02-15 03:38:34,907 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 03:38:34,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:34,908 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:34,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 43 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:34,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 03:38:34,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-15 03:38:34,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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) [2022-02-15 03:38:34,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-02-15 03:38:34,916 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 54 [2022-02-15 03:38:34,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:34,916 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-02-15 03:38:34,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 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) [2022-02-15 03:38:34,916 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-02-15 03:38:34,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 03:38:34,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:34,917 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:34,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 03:38:34,917 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:34,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:34,918 INFO L85 PathProgramCache]: Analyzing trace with hash 328203649, now seen corresponding path program 3 times [2022-02-15 03:38:34,918 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:34,918 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068511130] [2022-02-15 03:38:34,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:34,919 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:34,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:34,921 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:35,045 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,045 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068511130] [2022-02-15 03:38:35,045 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1068511130] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,045 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,045 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:35,045 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411661956] [2022-02-15 03:38:35,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:35,046 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:35,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:35,047 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2022-02-15 03:38:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:35,232 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2022-02-15 03:38:35,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:38:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 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 56 [2022-02-15 03:38:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:35,233 INFO L225 Difference]: With dead ends: 66 [2022-02-15 03:38:35,233 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 03:38:35,234 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2022-02-15 03:38:35,234 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 62 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:35,235 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 61 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:35,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 03:38:35,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2022-02-15 03:38:35,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.1346153846153846) internal successors, (59), 52 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) [2022-02-15 03:38:35,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 63 transitions. [2022-02-15 03:38:35,242 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 63 transitions. Word has length 56 [2022-02-15 03:38:35,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:35,243 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 63 transitions. [2022-02-15 03:38:35,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 9 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) [2022-02-15 03:38:35,243 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 63 transitions. [2022-02-15 03:38:35,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 03:38:35,243 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:35,243 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:35,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 03:38:35,244 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:35,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:35,244 INFO L85 PathProgramCache]: Analyzing trace with hash -351854721, now seen corresponding path program 3 times [2022-02-15 03:38:35,244 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:35,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706122504] [2022-02-15 03:38:35,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:35,246 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:35,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:35,248 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:35,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:35,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706122504] [2022-02-15 03:38:35,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [706122504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:38:35,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127819849] [2022-02-15 03:38:35,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:38:35,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:38:35,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:38:35,358 INFO L87 Difference]: Start difference. First operand 57 states and 63 transitions. Second operand has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2022-02-15 03:38:35,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:35,571 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2022-02-15 03:38:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 03:38:35,572 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 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 56 [2022-02-15 03:38:35,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:35,572 INFO L225 Difference]: With dead ends: 87 [2022-02-15 03:38:35,572 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 03:38:35,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-02-15 03:38:35,576 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 54 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:35,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 61 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:35,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 03:38:35,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2022-02-15 03:38:35,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.152542372881356) internal successors, (68), 59 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) [2022-02-15 03:38:35,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-02-15 03:38:35,587 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 56 [2022-02-15 03:38:35,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:35,588 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-02-15 03:38:35,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2022-02-15 03:38:35,588 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-02-15 03:38:35,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:38:35,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:35,589 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:35,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 03:38:35,589 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:35,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:35,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1780018396, now seen corresponding path program 4 times [2022-02-15 03:38:35,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:35,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [792525654] [2022-02-15 03:38:35,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:35,593 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:35,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:35,594 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:35,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:35,680 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [792525654] [2022-02-15 03:38:35,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [792525654] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:35,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555007661] [2022-02-15 03:38:35,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:35,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:35,681 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:35,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:35,821 INFO L93 Difference]: Finished difference Result 109 states and 130 transitions. [2022-02-15 03:38:35,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:38:35,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 03:38:35,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:35,822 INFO L225 Difference]: With dead ends: 109 [2022-02-15 03:38:35,822 INFO L226 Difference]: Without dead ends: 97 [2022-02-15 03:38:35,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:35,823 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:35,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 47 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-15 03:38:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2022-02-15 03:38:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.1975308641975309) internal successors, (97), 81 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:35,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 101 transitions. [2022-02-15 03:38:35,838 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 101 transitions. Word has length 58 [2022-02-15 03:38:35,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:35,838 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 101 transitions. [2022-02-15 03:38:35,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 101 transitions. [2022-02-15 03:38:35,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 03:38:35,839 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:35,839 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:35,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 03:38:35,839 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:35,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:35,840 INFO L85 PathProgramCache]: Analyzing trace with hash 2088694042, now seen corresponding path program 4 times [2022-02-15 03:38:35,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:35,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086983723] [2022-02-15 03:38:35,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:35,841 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:35,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:35,843 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:35,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:35,960 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:35,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086983723] [2022-02-15 03:38:35,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086983723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:35,960 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:35,960 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:38:35,960 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279129930] [2022-02-15 03:38:35,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:35,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:38:35,961 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:35,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:38:35,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:35,961 INFO L87 Difference]: Start difference. First operand 86 states and 101 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:36,297 INFO L93 Difference]: Finished difference Result 110 states and 132 transitions. [2022-02-15 03:38:36,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 03:38:36,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 03:38:36,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:36,299 INFO L225 Difference]: With dead ends: 110 [2022-02-15 03:38:36,299 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 03:38:36,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=534, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:38:36,300 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 73 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:36,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 67 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:36,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 03:38:36,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2022-02-15 03:38:36,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.2117647058823529) internal successors, (103), 85 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 107 transitions. [2022-02-15 03:38:36,324 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 107 transitions. Word has length 58 [2022-02-15 03:38:36,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:36,324 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 107 transitions. [2022-02-15 03:38:36,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,324 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 107 transitions. [2022-02-15 03:38:36,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:38:36,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:36,325 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:36,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 03:38:36,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:36,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash 144224649, now seen corresponding path program 5 times [2022-02-15 03:38:36,326 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:36,326 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284674243] [2022-02-15 03:38:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:36,327 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:36,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:36,329 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:36,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:36,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:36,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284674243] [2022-02-15 03:38:36,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [284674243] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:36,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:36,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:38:36,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93526974] [2022-02-15 03:38:36,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:36,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:38:36,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:36,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:38:36,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:36,432 INFO L87 Difference]: Start difference. First operand 90 states and 107 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:36,577 INFO L93 Difference]: Finished difference Result 106 states and 125 transitions. [2022-02-15 03:38:36,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:38:36,578 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 03:38:36,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:36,578 INFO L225 Difference]: With dead ends: 106 [2022-02-15 03:38:36,579 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 03:38:36,579 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:36,581 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 47 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:36,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 47 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:36,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 03:38:36,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2022-02-15 03:38:36,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.1625) internal successors, (93), 80 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2022-02-15 03:38:36,598 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 60 [2022-02-15 03:38:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:36,598 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2022-02-15 03:38:36,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,598 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2022-02-15 03:38:36,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:38:36,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:36,599 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:36,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 03:38:36,599 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:36,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash 2129101949, now seen corresponding path program 5 times [2022-02-15 03:38:36,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:36,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833264513] [2022-02-15 03:38:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:36,601 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:36,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:36,603 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:36,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:36,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:36,671 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:36,671 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833264513] [2022-02-15 03:38:36,671 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833264513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:36,671 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:36,671 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 03:38:36,671 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912651718] [2022-02-15 03:38:36,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:36,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 03:38:36,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:36,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 03:38:36,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 03:38:36,672 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:36,788 INFO L93 Difference]: Finished difference Result 91 states and 102 transitions. [2022-02-15 03:38:36,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 03:38:36,788 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 03:38:36,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:36,789 INFO L225 Difference]: With dead ends: 91 [2022-02-15 03:38:36,789 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 03:38:36,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:36,790 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 40 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:36,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 45 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 03:38:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2022-02-15 03:38:36,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.1587301587301588) internal successors, (73), 63 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2022-02-15 03:38:36,802 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 60 [2022-02-15 03:38:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:36,802 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2022-02-15 03:38:36,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2022-02-15 03:38:36,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 03:38:36,802 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:36,803 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 03:38:36,803 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:36,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:36,803 INFO L85 PathProgramCache]: Analyzing trace with hash -344219479, now seen corresponding path program 6 times [2022-02-15 03:38:36,803 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:36,803 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941657016] [2022-02-15 03:38:36,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:36,805 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:36,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:36,807 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:36,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:36,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:36,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:36,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:36,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941657016] [2022-02-15 03:38:36,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [941657016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:36,881 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:36,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 03:38:36,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434625209] [2022-02-15 03:38:36,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:36,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 03:38:36,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:36,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 03:38:36,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-02-15 03:38:36,882 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:37,007 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2022-02-15 03:38:37,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 03:38:37,008 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 03:38:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:37,008 INFO L225 Difference]: With dead ends: 79 [2022-02-15 03:38:37,008 INFO L226 Difference]: Without dead ends: 63 [2022-02-15 03:38:37,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:38:37,009 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 60 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:37,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 53 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:37,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-15 03:38:37,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-02-15 03:38:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-02-15 03:38:37,018 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 60 [2022-02-15 03:38:37,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:37,018 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-02-15 03:38:37,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-02-15 03:38:37,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:38:37,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:37,019 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:37,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 03:38:37,019 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:37,020 INFO L85 PathProgramCache]: Analyzing trace with hash -346543548, now seen corresponding path program 7 times [2022-02-15 03:38:37,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:37,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040488522] [2022-02-15 03:38:37,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:37,022 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:37,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:37,023 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:37,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:37,138 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:37,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040488522] [2022-02-15 03:38:37,139 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1040488522] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:37,139 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:37,139 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:38:37,139 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359589347] [2022-02-15 03:38:37,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:37,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:38:37,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:37,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:38:37,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:37,140 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:37,343 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-02-15 03:38:37,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:38:37,344 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 03:38:37,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:37,344 INFO L225 Difference]: With dead ends: 74 [2022-02-15 03:38:37,344 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 03:38:37,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:37,345 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 69 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:37,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 66 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 03:38:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 63. [2022-02-15 03:38:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2022-02-15 03:38:37,355 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 62 [2022-02-15 03:38:37,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:37,355 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2022-02-15 03:38:37,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,355 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2022-02-15 03:38:37,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 03:38:37,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:37,356 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:37,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 03:38:37,356 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:37,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:37,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1047608126, now seen corresponding path program 6 times [2022-02-15 03:38:37,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:37,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857834825] [2022-02-15 03:38:37,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:37,358 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:37,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:37,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:37,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:37,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857834825] [2022-02-15 03:38:37,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1857834825] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:37,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:37,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:38:37,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059984257] [2022-02-15 03:38:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:37,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:38:37,464 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:38:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:38:37,464 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:37,694 INFO L93 Difference]: Finished difference Result 99 states and 118 transitions. [2022-02-15 03:38:37,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 03:38:37,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 03:38:37,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:37,696 INFO L225 Difference]: With dead ends: 99 [2022-02-15 03:38:37,696 INFO L226 Difference]: Without dead ends: 81 [2022-02-15 03:38:37,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2022-02-15 03:38:37,697 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:37,697 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 66 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:37,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-02-15 03:38:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2022-02-15 03:38:37,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 82 transitions. [2022-02-15 03:38:37,711 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 82 transitions. Word has length 62 [2022-02-15 03:38:37,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:37,712 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 82 transitions. [2022-02-15 03:38:37,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,712 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 82 transitions. [2022-02-15 03:38:37,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:38:37,712 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:37,713 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:37,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 03:38:37,713 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:37,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1672013017, now seen corresponding path program 8 times [2022-02-15 03:38:37,713 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:37,713 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010266756] [2022-02-15 03:38:37,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:37,715 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:37,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:37,716 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:37,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:37,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:37,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:37,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010266756] [2022-02-15 03:38:37,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2010266756] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:37,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:37,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:37,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140962328] [2022-02-15 03:38:37,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:37,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:37,791 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:37,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:37,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:37,792 INFO L87 Difference]: Start difference. First operand 72 states and 82 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2022-02-15 03:38:37,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:37,955 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2022-02-15 03:38:37,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:38:37,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 64 [2022-02-15 03:38:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:37,957 INFO L225 Difference]: With dead ends: 129 [2022-02-15 03:38:37,957 INFO L226 Difference]: Without dead ends: 115 [2022-02-15 03:38:37,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:37,958 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:37,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 42 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-15 03:38:37,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2022-02-15 03:38:37,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:37,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 119 transitions. [2022-02-15 03:38:37,981 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 119 transitions. Word has length 64 [2022-02-15 03:38:37,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:37,982 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 119 transitions. [2022-02-15 03:38:37,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2022-02-15 03:38:37,982 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 119 transitions. [2022-02-15 03:38:37,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 03:38:37,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:37,983 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:37,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 03:38:37,983 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:37,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:37,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1013928861, now seen corresponding path program 7 times [2022-02-15 03:38:37,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:37,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1349818926] [2022-02-15 03:38:37,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:37,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:37,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:37,986 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:38,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:38,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:38,100 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:38,100 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1349818926] [2022-02-15 03:38:38,100 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1349818926] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:38,100 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:38,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:38:38,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500847458] [2022-02-15 03:38:38,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:38,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:38:38,101 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:38,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:38:38,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:38,101 INFO L87 Difference]: Start difference. First operand 100 states and 119 transitions. Second operand has 15 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) [2022-02-15 03:38:38,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:38,444 INFO L93 Difference]: Finished difference Result 132 states and 162 transitions. [2022-02-15 03:38:38,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 03:38:38,444 INFO L78 Accepts]: Start accepts. Automaton has has 15 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 64 [2022-02-15 03:38:38,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:38,445 INFO L225 Difference]: With dead ends: 132 [2022-02-15 03:38:38,445 INFO L226 Difference]: Without dead ends: 126 [2022-02-15 03:38:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=246, Invalid=746, Unknown=0, NotChecked=0, Total=992 [2022-02-15 03:38:38,447 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 81 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:38,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 67 Invalid, 341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:38,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-15 03:38:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 104. [2022-02-15 03:38:38,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.2222222222222223) internal successors, (121), 99 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 125 transitions. [2022-02-15 03:38:38,474 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 125 transitions. Word has length 64 [2022-02-15 03:38:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:38,474 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 125 transitions. [2022-02-15 03:38:38,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 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) [2022-02-15 03:38:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 125 transitions. [2022-02-15 03:38:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:38:38,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:38,475 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 03:38:38,475 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash -429691828, now seen corresponding path program 9 times [2022-02-15 03:38:38,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:38,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034181784] [2022-02-15 03:38:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:38,477 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:38,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:38,479 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:38,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:38,566 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:38,566 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034181784] [2022-02-15 03:38:38,566 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2034181784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:38,566 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:38,566 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:38:38,567 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229760338] [2022-02-15 03:38:38,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:38,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:38:38,567 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:38,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:38:38,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:38:38,568 INFO L87 Difference]: Start difference. First operand 104 states and 125 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:38,796 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2022-02-15 03:38:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:38:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:38,797 INFO L225 Difference]: With dead ends: 136 [2022-02-15 03:38:38,797 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 03:38:38,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2022-02-15 03:38:38,798 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:38,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 52 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:38,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 03:38:38,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 106. [2022-02-15 03:38:38,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.2178217821782178) internal successors, (123), 101 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2022-02-15 03:38:38,825 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 66 [2022-02-15 03:38:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:38,825 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2022-02-15 03:38:38,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2022-02-15 03:38:38,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:38:38,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:38,826 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:38,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 03:38:38,826 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:38,827 INFO L85 PathProgramCache]: Analyzing trace with hash 71914048, now seen corresponding path program 8 times [2022-02-15 03:38:38,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:38,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30739344] [2022-02-15 03:38:38,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:38,828 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:38,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:38,830 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:38,906 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:38,906 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30739344] [2022-02-15 03:38:38,906 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [30739344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:38,906 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:38,907 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 03:38:38,907 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049605598] [2022-02-15 03:38:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:38,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 03:38:38,907 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 03:38:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-02-15 03:38:38,908 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2022-02-15 03:38:39,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:39,104 INFO L93 Difference]: Finished difference Result 134 states and 162 transitions. [2022-02-15 03:38:39,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 03:38:39,104 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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 66 [2022-02-15 03:38:39,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:39,105 INFO L225 Difference]: With dead ends: 134 [2022-02-15 03:38:39,105 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 03:38:39,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-15 03:38:39,106 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 47 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:39,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 56 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:39,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 03:38:39,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 94. [2022-02-15 03:38:39,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2022-02-15 03:38:39,127 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 66 [2022-02-15 03:38:39,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:39,127 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2022-02-15 03:38:39,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 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) [2022-02-15 03:38:39,127 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2022-02-15 03:38:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 03:38:39,128 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:39,128 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:39,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 03:38:39,128 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:39,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:39,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1121275668, now seen corresponding path program 10 times [2022-02-15 03:38:39,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:39,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761767823] [2022-02-15 03:38:39,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:39,130 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:39,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:39,132 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:39,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:39,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:39,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761767823] [2022-02-15 03:38:39,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1761767823] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:39,214 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:39,214 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 03:38:39,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570546817] [2022-02-15 03:38:39,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:39,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 03:38:39,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:39,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 03:38:39,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-02-15 03:38:39,215 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:39,427 INFO L93 Difference]: Finished difference Result 118 states and 140 transitions. [2022-02-15 03:38:39,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 03:38:39,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 03:38:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:39,428 INFO L225 Difference]: With dead ends: 118 [2022-02-15 03:38:39,428 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 03:38:39,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2022-02-15 03:38:39,429 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:39,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 55 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:39,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 03:38:39,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-02-15 03:38:39,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.1547619047619047) internal successors, (97), 84 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2022-02-15 03:38:39,448 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 66 [2022-02-15 03:38:39,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:39,448 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2022-02-15 03:38:39,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,448 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2022-02-15 03:38:39,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:38:39,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:39,449 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:39,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 03:38:39,449 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:39,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:39,449 INFO L85 PathProgramCache]: Analyzing trace with hash 719926191, now seen corresponding path program 11 times [2022-02-15 03:38:39,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:39,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337539495] [2022-02-15 03:38:39,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:39,451 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:39,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:39,453 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:39,558 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:39,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337539495] [2022-02-15 03:38:39,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [337539495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:39,559 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:39,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:38:39,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950066265] [2022-02-15 03:38:39,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:39,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:38:39,561 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:39,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:38:39,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:39,562 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:39,812 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2022-02-15 03:38:39,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:39,813 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:38:39,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:39,814 INFO L225 Difference]: With dead ends: 106 [2022-02-15 03:38:39,814 INFO L226 Difference]: Without dead ends: 69 [2022-02-15 03:38:39,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:39,815 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 44 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:39,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 59 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:39,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-02-15 03:38:39,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-02-15 03:38:39,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-02-15 03:38:39,828 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 68 [2022-02-15 03:38:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:39,828 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-02-15 03:38:39,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:39,832 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-02-15 03:38:39,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:38:39,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:39,833 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:39,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 03:38:39,834 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:39,834 INFO L85 PathProgramCache]: Analyzing trace with hash 462723015, now seen corresponding path program 12 times [2022-02-15 03:38:39,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:39,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901323067] [2022-02-15 03:38:39,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:39,837 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:39,840 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:39,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:39,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:39,980 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:39,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901323067] [2022-02-15 03:38:39,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [901323067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:39,980 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:39,980 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:38:39,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497405734] [2022-02-15 03:38:39,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:39,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:38:39,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:39,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:38:39,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:39,982 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:40,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:40,286 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2022-02-15 03:38:40,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:38:40,286 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:38:40,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:40,287 INFO L225 Difference]: With dead ends: 82 [2022-02-15 03:38:40,287 INFO L226 Difference]: Without dead ends: 76 [2022-02-15 03:38:40,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:38:40,288 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 71 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:40,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 66 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-15 03:38:40,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 69. [2022-02-15 03:38:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:40,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 77 transitions. [2022-02-15 03:38:40,305 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 77 transitions. Word has length 68 [2022-02-15 03:38:40,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:40,305 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 77 transitions. [2022-02-15 03:38:40,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 13 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:40,305 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 77 transitions. [2022-02-15 03:38:40,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 03:38:40,306 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:40,306 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:40,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 03:38:40,306 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:40,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1049529029, now seen corresponding path program 9 times [2022-02-15 03:38:40,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:40,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975569554] [2022-02-15 03:38:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:40,308 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:40,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:40,310 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:40,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:40,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:40,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:40,457 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:40,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975569554] [2022-02-15 03:38:40,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1975569554] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:40,457 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:40,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 03:38:40,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703763195] [2022-02-15 03:38:40,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:40,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 03:38:40,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:40,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 03:38:40,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-15 03:38:40,458 INFO L87 Difference]: Start difference. First operand 69 states and 77 transitions. Second operand has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:40,744 INFO L93 Difference]: Finished difference Result 111 states and 134 transitions. [2022-02-15 03:38:40,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:38:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 03:38:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:40,745 INFO L225 Difference]: With dead ends: 111 [2022-02-15 03:38:40,745 INFO L226 Difference]: Without dead ends: 91 [2022-02-15 03:38:40,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:38:40,746 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 58 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:40,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 51 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-15 03:38:40,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2022-02-15 03:38:40,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 75 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:40,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2022-02-15 03:38:40,765 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 68 [2022-02-15 03:38:40,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:40,766 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2022-02-15 03:38:40,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:40,766 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2022-02-15 03:38:40,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 03:38:40,766 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:40,767 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:40,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 03:38:40,767 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:40,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1355926550, now seen corresponding path program 13 times [2022-02-15 03:38:40,767 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:40,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653577267] [2022-02-15 03:38:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:40,769 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:40,770 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:40,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:40,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:40,871 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:40,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653577267] [2022-02-15 03:38:40,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [653577267] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:40,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:40,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 03:38:40,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454473937] [2022-02-15 03:38:40,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:40,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 03:38:40,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:40,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 03:38:40,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-02-15 03:38:40,872 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:41,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:41,113 INFO L93 Difference]: Finished difference Result 149 states and 184 transitions. [2022-02-15 03:38:41,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 03:38:41,114 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-15 03:38:41,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:41,115 INFO L225 Difference]: With dead ends: 149 [2022-02-15 03:38:41,115 INFO L226 Difference]: Without dead ends: 133 [2022-02-15 03:38:41,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=384, Unknown=0, NotChecked=0, Total=506 [2022-02-15 03:38:41,116 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 54 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:41,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 47 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-15 03:38:41,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 114. [2022-02-15 03:38:41,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 109 states have (on average 1.2201834862385321) internal successors, (133), 109 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:41,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 137 transitions. [2022-02-15 03:38:41,160 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 137 transitions. Word has length 70 [2022-02-15 03:38:41,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:41,161 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 137 transitions. [2022-02-15 03:38:41,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:41,161 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 137 transitions. [2022-02-15 03:38:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 03:38:41,161 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:41,162 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:41,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 03:38:41,162 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:41,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:41,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1441126688, now seen corresponding path program 10 times [2022-02-15 03:38:41,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:41,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435591858] [2022-02-15 03:38:41,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:41,163 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:41,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:41,166 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:41,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:41,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:41,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:41,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:41,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435591858] [2022-02-15 03:38:41,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [435591858] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:41,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:41,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 03:38:41,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75533991] [2022-02-15 03:38:41,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:41,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 03:38:41,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:41,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 03:38:41,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-15 03:38:41,556 INFO L87 Difference]: Start difference. First operand 114 states and 137 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2022-02-15 03:38:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:42,109 INFO L93 Difference]: Finished difference Result 143 states and 174 transitions. [2022-02-15 03:38:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 03:38:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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 70 [2022-02-15 03:38:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:42,110 INFO L225 Difference]: With dead ends: 143 [2022-02-15 03:38:42,110 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 03:38:42,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 03:38:42,111 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 93 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:42,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 28 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 03:38:42,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 03:38:42,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 99. [2022-02-15 03:38:42,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 94 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:42,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 113 transitions. [2022-02-15 03:38:42,144 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 113 transitions. Word has length 70 [2022-02-15 03:38:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:42,145 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 113 transitions. [2022-02-15 03:38:42,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 16 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) [2022-02-15 03:38:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 113 transitions. [2022-02-15 03:38:42,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:38:42,145 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:42,145 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:42,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 03:38:42,146 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:42,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:42,146 INFO L85 PathProgramCache]: Analyzing trace with hash 1988634575, now seen corresponding path program 14 times [2022-02-15 03:38:42,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:42,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450409266] [2022-02-15 03:38:42,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:42,148 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:42,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:42,150 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:42,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:42,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:42,264 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:42,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450409266] [2022-02-15 03:38:42,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450409266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:42,264 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:42,264 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:38:42,264 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58235452] [2022-02-15 03:38:42,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:42,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:38:42,265 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:42,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:38:42,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:38:42,265 INFO L87 Difference]: Start difference. First operand 99 states and 113 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2022-02-15 03:38:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:42,613 INFO L93 Difference]: Finished difference Result 140 states and 168 transitions. [2022-02-15 03:38:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:38:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 72 [2022-02-15 03:38:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:42,614 INFO L225 Difference]: With dead ends: 140 [2022-02-15 03:38:42,614 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 03:38:42,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2022-02-15 03:38:42,616 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 49 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:42,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 61 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 03:38:42,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 103. [2022-02-15 03:38:42,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.163265306122449) internal successors, (114), 98 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-02-15 03:38:42,654 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 72 [2022-02-15 03:38:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:42,654 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-02-15 03:38:42,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2022-02-15 03:38:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-02-15 03:38:42,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 03:38:42,655 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:42,655 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:42,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 03:38:42,655 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:42,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:42,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1533649391, now seen corresponding path program 15 times [2022-02-15 03:38:42,656 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:42,656 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253107244] [2022-02-15 03:38:42,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:42,657 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:42,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:42,659 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:42,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:42,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:42,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:42,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:42,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253107244] [2022-02-15 03:38:42,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [253107244] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:42,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:42,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 03:38:42,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974107619] [2022-02-15 03:38:42,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:42,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 03:38:42,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:42,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 03:38:42,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2022-02-15 03:38:42,769 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2022-02-15 03:38:43,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:43,090 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2022-02-15 03:38:43,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 03:38:43,091 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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 72 [2022-02-15 03:38:43,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:43,091 INFO L225 Difference]: With dead ends: 122 [2022-02-15 03:38:43,092 INFO L226 Difference]: Without dead ends: 85 [2022-02-15 03:38:43,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2022-02-15 03:38:43,093 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:43,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 71 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:43,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-15 03:38:43,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-15 03:38:43,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.15) internal successors, (92), 80 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) [2022-02-15 03:38:43,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 96 transitions. [2022-02-15 03:38:43,124 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 96 transitions. Word has length 72 [2022-02-15 03:38:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:43,124 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 96 transitions. [2022-02-15 03:38:43,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 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) [2022-02-15 03:38:43,125 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 96 transitions. [2022-02-15 03:38:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 03:38:43,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 03:38:43,125 INFO L514 BasicCegarLoop]: trace histogram [7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 03:38:43,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 03:38:43,125 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 03:38:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 03:38:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 769718898, now seen corresponding path program 16 times [2022-02-15 03:38:43,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 03:38:43,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1282535943] [2022-02-15 03:38:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 03:38:43,128 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Qvasr do not support arrays. [2022-02-15 03:38:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 03:38:43,129 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 03:38:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:43,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 03:38:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 03:38:43,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 03:38:43,256 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 03:38:43,256 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1282535943] [2022-02-15 03:38:43,256 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1282535943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 03:38:43,256 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 03:38:43,256 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 03:38:43,256 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111456127] [2022-02-15 03:38:43,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 03:38:43,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 03:38:43,257 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 03:38:43,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 03:38:43,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-02-15 03:38:43,257 INFO L87 Difference]: Start difference. First operand 85 states and 96 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:43,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 03:38:43,551 INFO L93 Difference]: Finished difference Result 94 states and 108 transitions. [2022-02-15 03:38:43,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 03:38:43,552 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 03:38:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 03:38:43,553 INFO L225 Difference]: With dead ends: 94 [2022-02-15 03:38:43,553 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 03:38:43,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2022-02-15 03:38:43,554 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 03:38:43,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 58 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 03:38:43,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 03:38:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 03:38:43,555 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) [2022-02-15 03:38:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 03:38:43,555 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 74 [2022-02-15 03:38:43,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 03:38:43,555 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 03:38:43,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 03:38:43,555 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 03:38:43,555 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 03:38:43,558 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 03:38:43,558 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 03:38:43,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.